Product release
Browser-based workflows
English
AK
appkiro.com
Complete web tools for everyone.
Browser-based tools for images, color, PDF, text, CSS, audio, video, and everyday digital work — no upload, no signup, runs locally.
Focused workflows
Open the tool you need, finish the task quickly, and export the result without extra friction.
Built for real work
Use Appkiro for production tasks across images, color, PDF, text, and everyday digital operations.
Private by default
Core workflows stay in the browser so you can move faster and keep routine work self-serve.
New Tools
New
Database Connection Checker
Test PostgreSQL, MySQL, MongoDB, and Redis connections, inspect read-only metadata, and convert database URIs for Navicat, TablePlus, DBeaver, DataGrip, Prisma, Laravel, and CLI workflows.
New
Zip và UnZip Online
Zip và UnZip Online directly in your browser with fflate. Create ZIP archives, extract ZIP files, add files or folders, choose compression level, inspect contents, and download results without uploading private files.
New
RSA Key Pair Generator
Generate real RSA key pairs (2048, 3072, 4096-bit) with PEM PKCS#8 + SPKI, OpenSSH public key, JWK, and SHA-256 fingerprint. Fully local via Web Crypto API for JWT signing, mTLS, SSH access, and JWKS endpoints.
Popular Tools
Color Palette Generator
Generate ready-to-use color palettes for branding, interfaces, illustration, packaging, and social content.
Background Remover
Remove image backgrounds quickly and export clean cutouts for products, portraits, mockups, and social assets.
Image to WebP Converter
Convert uploaded image files, image URLs, or non-WebP images found on a website to WebP in batches of up to 36 files.
AK
Mobile roadmap
appkiro.com for iPhone and Android
The web product is live today. Native mobile apps are planned next so the same fast workflows can travel with you.
Web product available now
App Store release coming soon
iPhone
Android
Video
Record Live Media
Record your camera, screen, microphone, or a combined source directly in your browser.
Video Converter
Convert video files between MP4, WebM, MKV, and MOV formats directly in your browser.
Video Compressor
Compress MP4, WebM, MOV, and MKV in your browser. Hit a target file size with H.264, H.265, or AV1, downscale resolution, drop frame rate, strip audio, and preview the result before download.
Video to GIF
Convert MP4, MOV, WebM, and MKV clips to GIF or animated WebP with quality, resolution, FPS, loop, and trim controls.
Add Subtitles to Video
Add subtitles (SRT, VTT) to your video easily. Customize font, size, color, position and style, then burn them directly into MP4.
Merge Video
Combine multiple video files into a single output. Reorder clips, trim each segment, mute audio, and export to MP4 or WebM directly in your browser.
Split Video
Split one video into multiple clips by markers, duration, count, or custom ranges, then export selected segments as files or a ZIP.
Video Trimmer
Trim and cut video segments by start and end timestamps directly in your browser.
HLS Clip Cutter
Cut a clip from any public HLS (m3u8) stream. Choose start time, end time, quality, audio track, and export to MP4, WebM, or MKV in your browser.
Crop Video
Crop unwanted areas from your video. Pick an aspect ratio, drag the crop box, and export an MP4 directly in your browser.
Video Resizer
Resize video resolution, aspect ratio, and fit mode directly in your browser.
Video Rotator
Rotate videos by 90, 180, or 270 degrees directly in your browser.
Add Audio to Video
Add background music, voice-over, or sound effects to any video with volume, fade, trim, loop, and ducking controls directly in your browser.
Add Overlay to Video
Add text and image overlays to a video. Customize font, color, position, opacity, rotation and time range, then burn into MP4 in the browser.
Add Watermark to Video
Watermark a video with a logo or text stamp. Control size, opacity, position, rotation and duration, then export burn-in MP4 directly in your browser.
Video Thumbnail Generator
Extract high-quality thumbnails from video files at custom intervals, timestamps, or counts directly in your browser. Convert video to image snapshots for previews, covers, and social media.
Video & Audio Metadata Editor
Edit metadata of your video or audio files. Update title, artist, album, year, description, cover art and more without re-encoding.
AI Scene Detection
Video Scene Detection helps automatically detect scene changes in a video, review cut points, and export timestamps as JSON, CSV, or chapter markers.
Metadata Extraction
Extract metadata from videos and audio files including format, duration, codecs, tracks, and embedded tags.
Share Sample Video Files
Browse, preview, and copy direct links for free MP4, WebM, and OGV sample videos at 240p–1080p for HTML5 players, upload tests, and streaming demos.
Audio
Microphone Tester
Test your microphone in the browser with delayed replay, live waveform, frequency spectrum, peak meter, and noise floor readings.
Voice Recorder
Record voice from your microphone in the browser, preview the clip, and export it as MP3, WAV, or M4A without uploading audio.
Video to Audio
Extract audio from video, trim with a real waveform editor, and export to MP3, WAV, FLAC, OGG, Opus, AAC, or M4A directly in your browser.
Change Audio Speed
Slow down or speed up MP3, WAV, M4A, AAC, OGG, FLAC, and Opus audio without changing pitch. WSOLA time-stretching with fade in/out, normalize, and export to MP3, WAV, M4A, OGG, or FLAC — all in your browser.
Audio Trimmer
Trim audio precisely with a real waveform editor. Cut MP3, WAV, M4A, AAC, OGG, or FLAC and export to the format you need — all in your browser.
Audio Normalizer
Normalize audio loudness to a target LUFS or peak with EBU R128, ReplayGain, or peak modes. Prevent clipping with a max true-peak limit and export to MP3, WAV, FLAC, M4A, AAC, or OGG.
Audio Effects
Enhance audio with normalization, bass boost, noise reduction, EQ, reverb, echo, compression, and stereo widening directly in your browser.
Silence Remover
Automatically detect and remove silent parts from podcasts, voice notes, interviews, and other audio files directly in your browser.
Voice Cleaner
Remove background noise, echo, hum, breaths, and harsh sibilance while enhancing voice clarity for podcasts, recordings, interviews, and more.
Merge Audio
Combine multiple audio files into one. Reorder tracks, crossfade transitions, and export to MP3, WAV, FLAC, OGG, Opus, AAC, or M4A — all in your browser.
Split Audio
Split an audio file into multiple parts by count, duration, or custom markers directly in your browser.
Convert MP3
Convert MP3 files to other audio formats quickly and easily.
Sample Audio Files
Browse, preview, and download free MP3, WAV, OGG, M4A, AAC, and FLAC sample audio files curated from public sources and the AppKiro library — ideal for HTML5 audio, upload tests, streaming demos, and prototypes.
Images & Assets
Artwork Enhancer
Add subtle color noise and texture to digital artwork so flat gradients and solid fills feel richer and more organic.
Background Remover
Remove image backgrounds quickly and export clean cutouts for products, portraits, mockups, and social assets.
Blur Background
Blur the background of any image while keeping the subject sharp. Pick AI auto-detect or a manual rectangle, fine-tune intensity and edge feathering, and export as JPG, PNG, or WebP — all in your browser.
Flip Image
Flip images horizontally or vertically with realtime preview. Lossless mirror, JPG/PNG/WebP export, all processed locally in your browser.
Grayscale Image
Convert color photos to grayscale in your browser. Pick lightness, luminosity, or average methods, fine-tune contrast, brightness, and saturation, then export as JPG, PNG, or WebP.
Image Resize
Resize up to 36 images by exact pixels, percentage, or fit-to-box presets while keeping aspect ratio. Preview and export JPG, PNG, WebP, or a ZIP directly in your browser.
Image Collage Maker
Combine multiple JPG, PNG, and WebP images into grid, masonry, strip, story, or polaroid collage layouts with custom canvas size, spacing, background, and PNG/JPG/WebP export.
Picture to Pixel Art
Convert any picture into pixel art with adaptive or retro palettes (Game Boy, NES, CGA), Floyd-Steinberg or ordered dithering, custom backgrounds, and 1×–8× export — all in your browser.
Rotate Image
Rotate images by 90°, 180°, -90°, or any custom angle from -180° to 180°. Background fill, auto crop to fit, JPG/PNG/WebP export — all in your browser.
Add Text to Image
Add text to your images with different fonts, colors, and styles. Tune outline, shadow, and a translucent plate, then export JPG, PNG, or WebP — all in your browser.
Add Logo to Image
Add a logo, badge, or watermark to any photo with full control over position, size, opacity, margin, and rotation. Live preview, JPG/PNG/WebP export, all processed locally in your browser.
Add Border to Image
Add a border or frame around any image with solid, dashed, dotted, double, or inset styles, custom colors, rounded corners, padding, and optional drop shadow. Live preview, JPG/PNG/WebP export, all in browser.
Favicon Generator
Generate favicon files and common app icon sizes from one source image for websites, PWAs, and bookmarks.
Favicon Builder
Generate the full favicon and PWA package from text, emoji, or uploaded images. Exports ICO, 14 PNG sizes, SVG, Web App Manifest, HTML snippet, and a Next.js App Router bundle.
App Icon Generator
Generate app icon packages from text or an image for iOS, iPadOS, watchOS, macOS, Android, Web/PWA, and Next.js projects with ready-to-use source folders.
Transparent PNG Trimmer
Trim empty transparent space around PNG artwork so files are tighter, cleaner, and easier to place in layouts.
Pixelate Image
Pixelate image areas instantly for private redaction. Blur or block sensitive details, then export PNG, JPG, or WebP in your browser.
Image Converter
Convert images between PNG, JPEG, WebP, AVIF, GIF, BMP, TIFF, ICO, and ICNS with browser-based processing.
Image Metadata Viewer (EXIF)
View and analyze EXIF, GPS, IPTC, XMP, TIFF, and ICC metadata from image files directly in your browser.
Image to WebP Converter
Convert uploaded image files, image URLs, or non-WebP images found on a website to WebP in batches of up to 36 files.
GIF Compressor
Reduce animated GIF file size with smart palette reduction, lossy compression, and frame-level optimization. Batch process multiple GIFs locally in your browser — no upload, no signup.
GIF Crop
Batch crop animated GIFs in your browser. Pick aspect ratio presets, drag the crop box, and export every frame at the new size — all locally.
GIF Upside Down
Reverse the playback order of animated GIFs in your browser. Keeps each frame's original duration so the animation plays back perfectly in reverse.
Extract Frames from GIF
Extract every frame from animated GIF, WebP, or APNG files as PNG, JPG, or WebP images. Set frame range, step, and filename pattern, then download a ZIP — all locally in your browser.
Image Splitter
Split one image into multiple tiles for print layouts, design workflows, or social media posting.
Image to SVG Converter
Trace raster images and export editable SVG vectors for logos, icons, artwork, and print-ready graphics.
Paste Image
Paste an image directly from your clipboard, crop it quickly, and download the result without extra software.
Placeholder Generator
Generate placeholder images with custom sizes, colors, and labels for mockups, wireframes, and development.
SVG Optimizer
Optimize SVG files to reduce file size, remove unnecessary markup, and keep graphics lightweight for the web.
PDF Tools
Images to PDF
Convert JPG, PNG, WebP, GIF, BMP, and TIFF images into a single PDF with custom page size, margins, layout templates, and metadata directly in your browser.
PDF to Image
Convert PDF pages to JPG, PNG, or WebP images. Pick page range, resolution, color mode, and background, then download a single image or a ZIP archive.
Rotate PDF
Rotate PDF pages 90, 180, or 270 degrees. Apply to all pages, a range, or hand-pick pages, then download the rotated PDF without re-uploading.
Merge PDF
Combine multiple PDF files into a single document. Drag to reorder, choose page size, orientation, margins, and optionally insert blank pages between files.
Split PDF
Split one PDF into multiple files by page range, extract specific pages into a single PDF, or break every page into its own file. Custom filenames and ZIP download.
PDF Preflight Checker
Check PDFs for print-readiness issues before you send files to press or share them with production teams.
PDF Imposer
Arrange PDF pages for booklet printing, saddle stitch, step-and-repeat, gang runs, and custom N-up layouts.
Mini Zine Imposer
Turn PDF pages into printable 8-page mini zine layouts that are ready to fold, cut, and distribute.
Color
Color Blindness Simulator
Preview how colors appear across common types of color blindness so you can make safer design decisions.
Color Converter
Convert color values between HEX, RGB, HSL, LCH, LAB, OKLAB, and OKLCH without leaving your browser.
Color Contrast Checker
Check text and background color combinations against WCAG contrast requirements for accessible websites and interfaces.
Gradient Generator
Create linear, radial, and conic CSS gradients visually with live preview and copy clean CSS or Tailwind utility classes instantly.
Color Harmony Generator
Generate complementary, analogous, triadic, and other balanced color harmonies from a single starting color.
Palette Library
Browse curated color palettes for UI, brand, and content work, then refine promising swatches or test contrast before using them.
Color Palette Extractor
Extract clean color palettes from photos, artwork, screenshots, and other images with one upload.
Color Palette Generator
Generate ready-to-use color palettes for branding, interfaces, illustration, packaging, and social content.
Image Color Picker
Pick exact colors from any image with a zoomed preview so you can sample confidently down to the pixel.
Tailwind Color Generator
Turn a single base color into a full Tailwind-ready shade scale you can use in UI design and development.
HEX to Colortone Converter
Map a HEX color to its closest CSS named color (Colortone).
RGB to Colortone Converter
Map an RGB triple to its nearest CSS named color (Colortone).
HSL to Colortone Converter
Map an HSL color to the closest CSS named color.
HSV to Colortone Converter
Map an HSV color to the closest CSS named color (Colortone).
CMYK to Colortone Converter
Map a CMYK color to the closest CSS named color (Colortone).
CMYK to HEX Converter
Convert CMYK percentages to a six-digit HEX color for web use.
CMYK to RGB Converter
Convert CMYK percentages to RGB integers for screen rendering.
CMYK to HSL Converter
Convert CMYK percentages to HSL for CSS color editing.
CMYK to HSV Converter
Convert CMYK colors to HSV for screen-friendly editing.
HSV to HEX Converter
Lock in HSV picks as portable HEX color codes.
HSV to RGB Converter
Convert HSV values to RGB triples for canvas, CSS and shaders.
HSV to HSL Converter
Convert HSV picker values into CSS-friendly HSL notation.
HSV to CMYK Converter
Translate HSV values into CMYK percentages for print briefs.
HSL to HEX Converter
Convert HSL values into compact six-digit HEX color codes.
HSL to RGB Converter
Convert HSL values into RGB channel values for canvas and APIs.
HSL to HSV Converter
Convert HSL colors into HSV picker values.
HSL to CMYK Converter
Convert HSL colors into approximate CMYK print percentages.
HEX to HSV Converter
Convert HEX colors into HSV — hue, saturation and value.
HEX to HSL Converter
Convert HEX color codes into CSS HSL values.
RGB to HEX Converter
Convert RGB triples into the canonical six-digit HEX code.
RGB to HSV Converter
Convert RGB to HSV for hue-led color tweaking.
RGB to HSL Converter
Convert RGB channel values into CSS HSL notation.
RGB to CMYK Converter
Convert RGB to CMYK percentages for print briefs.
HEX to RGB Converter
Convert HEX color codes into RGB integers for canvas and CSS.
HEX to CMYK Converter
Convert HEX color codes into CMYK percentages for print.
Colortone to HEX Converter
Look up the canonical HEX code for any CSS named color.
Colortone to RGB Converter
Convert any CSS named color into RGB integers.
Colortone to HSL Converter
Convert any CSS named color into HSL notation.
Colortone to CMYK Converter
Convert a CSS named color into CMYK percentages for print.
Colortone to HSV Converter
Convert a CSS named color into hue, saturation and value.
Base64 Tools
Base64 Encoder / Decoder
Encode and decode Base64 strings, with standard and URL-safe variants plus output information.
Image to Base64
Encode any image (PNG, JPG, WebP, AVIF, GIF, SVG, BMP) into Base64 with optional data URL prefix.
Base64 to Image
Decode Base64 or data URLs back into an image preview and download.
MP3 to Base64
Encode MP3 audio into Base64 with optional data URL prefix for inline use.
Audio to Base64
Encode any audio file (MP3, WAV, OGG, M4A, FLAC, Opus) into Base64.
PNG to Base64
Encode PNG images into Base64 with full transparency preserved.
JPEG to Base64
Encode JPEG/JPG photos into Base64 for inline use and pipelines.
JSON to Base64
Encode JSON documents into Base64 for transport-friendly payloads.
XML to Base64
Encode XML markup into Base64 to embed inside JSON or query strings.
YAML to Base64
Encode YAML documents into Base64 — multi-line, indentation-safe.
Base64 to JSON
Decode Base64 back into JSON documents for inspection.
Base64 to XML
Decode Base64 back into XML markup for review and reformatting.
Base64 to YAML
Decode Base64 back into the original YAML document.
CSV to Base64
Encode CSV tables into Base64 for transport-safe sharing.
Base64 to CSV
Decode CSV bytes from Base64 for spreadsheets and ETL flows.
TSV to Base64
Encode tab-separated values into Base64 for transport.
Base64 to TSV
Decode TSV bytes from Base64 back into tab-separated tables.
Binary to Base64
Convert byte-aligned binary into Base64 for wire transport.
Base64 to Binary
Decode Base64 into space-separated 8-bit byte strings.
Hexadecimal to Base64
Convert hexadecimal byte sequences into Base64.
Base64 to Hexadecimal
Decode Base64 into uppercase hexadecimal byte pairs.
Octal to Base64
Convert octal byte streams into Base64 for legacy interop.
Base64 to Octal
Decode Base64 into octal digit streams.
HTML to Base64
Encode HTML markup into Base64 for inline transport.
Base64 to HTML
Decode Base64 back into HTML markup.
CSS to Base64
Encode CSS source into Base64 for data URIs and pipelines.
Base64 to CSS
Decode Base64 back into CSS source ready to paste.
Javascript to Base64
Encode JavaScript source into Base64 for inline transport.
Base64 to Javascript
Decode Base64 back into JavaScript source for review.
Ascii to Base64
Encode decimal ASCII byte values into Base64.
Base64 to Ascii
Decode Base64 into decimal byte (ASCII) values.
Text to Base64
Encode plain UTF-8 text into Base64.
Base64 to Text
Decode Base64 back into the original UTF-8 text.
SVG to Base64
Encode SVG vector files into Base64 for CSS and inline use.
BMP to Base64
Encode BMP bitmap files into Base64 for transport.
GIF to Base64
Encode GIF animations into Base64, preserving every frame.
WebP to Base64
Encode WebP images into Base64 for inline use.
AVIF to Base64
Encode AVIF photos into Base64 for modern browser data URIs.
APNG to Base64
Encode animated PNG (APNG) into Base64, preserving frames and timing.
Data
JSON Formatter
Beautify, minify, and validate JSON in your browser with indent, key sorting, non-ASCII escape, and clear line/column error reporting — no upload required.
Zip và UnZip OnlineNew
Zip và UnZip Online directly in your browser with fflate. Create ZIP archives, extract ZIP files, add files or folders, choose compression level, inspect contents, and download results without uploading private files.
CSV to JSON
Convert pasted CSV/TSV, uploaded CSV files, or public web page tables into JSON directly in your browser.
Excel to JSON
Convert Excel spreadsheets (.xlsx, .xls) into JSON instantly. Multi-sheet preview, type coercion, pretty or minified output - all processed in your browser.
Excel to Markdown Table
Convert Excel spreadsheets (.xlsx, .xls), Google Sheets URLs, or pasted tables into Markdown tables, grid tables, or HTML — all processed in your browser.
JSON to Excel
Convert JSON arrays, API responses, and uploaded JSON files into Excel spreadsheets with flattening, array expansion, and CSV export.
XML to JSON
Convert pasted XML, public XML URLs, RSS feeds, or uploaded XML files into clean JSON with attribute, type parsing, and output shape controls.
JSON to CSV
Convert pasted JSON, public JSON APIs, or uploaded JSON files into CSV with delimiter, quoting, line ending, and BOM controls — all processed in your browser.
JSON to YAML
Convert pasted JSON, public JSON URLs, or uploaded JSON files into clean YAML 1.2 with indent, quoting, multi-line block, and document marker controls — all in your browser.
YAML to XML
Convert YAML to XML with configurable root elements, pretty print, XML declaration, and direct browser-based XML export.
JSON to XML
Convert pasted JSON, public JSON URLs, or uploaded JSON files into well-formed XML with root name, indent, null strategy, CDATA wrapping, and declaration controls — all in your browser.
JSON to Markdown Table
Convert JSON arrays or objects into clean Markdown tables, lists, structured documents, or HTML tables. Perfect for README files, GitHub, Notion, and Obsidian — all processed in your browser.
JSON to Zod
Convert JSON objects or arrays into Zod schemas with accurate types, optional fields, nested structures, and TypeScript type inference — all processed in your browser.
JSON to Schema
Convert JSON objects or arrays into JSON Schema (Draft 4, 6, 7, 2019-09, 2020-12) with accurate types, format detection, required fields, and validation rules — all in your browser.
JSON to Function Calling Schema
Convert JSON objects into Function Calling schemas for OpenAI, Claude, and Gemini. Tool calling, structured outputs, and AI integrations — all processed in your browser.
JSON to TypeScript
Convert JSON objects or arrays into TypeScript interfaces or type aliases with nested extraction, readonly modifiers, optional fields, and string literal unions — all processed in your browser.
Excel to XML
Convert Excel spreadsheets (.xlsx, .xls), CSV files, and pasted table content into clean XML with element or attribute cell styles, multi-sheet support, and CDATA controls — all processed in your browser.
String Tools
Upside Down Text
Flip short phrases into upside-down Unicode characters for playful captions, usernames, profile notes, and copy-paste experiments.
Random Word Generator
Generate random words for naming ideas, classroom prompts, placeholder labels, fixture data, and quick creative exercises.
NTLM Hash Generator
Compute NTLM hashes from sample passwords for authorized security labs, parser tests, documentation, and legacy Windows research.
String Builder
Combine line-based snippets with custom prefixes, suffixes, wrappers, and separators for queries, labels, fixtures, and code notes.
Number to Word Converter
Spell out numbers in English words for drafts, checks, invoices, contracts, classroom material, and amount validation.
Word to Number Converter
Parse English number words into numeric values for forms, survey cleanup, spreadsheet import, and amount checking.
Word Repeater
Repeat one word with a custom count and separator for layout checks, parser fixtures, classroom exercises, and stress tests.
Reverse String
Reverse text character by character for puzzles, Unicode checks, parser experiments, and order-sensitive debugging.
String to Hex Converter
Encode UTF-8 text into hexadecimal byte pairs for payload inspection, byte-level debugging, documentation, and test fixtures.
Hex to String Converter
Decode hexadecimal byte pairs into UTF-8 text for reading logs, packet notes, token dumps, and small binary snippets.
Case Converter
Convert labels between camelCase, PascalCase, snake_case, kebab-case, Title Case, and other naming styles.
Delimited Text Extractor
Extract one field from CSV, TSV, pipe-separated text, or log lines when an export contains more columns than you need.
Remove Accents
Strip diacritical marks from names, titles, tags, and search keys while keeping a plain-text companion value.
Remove Duplicate Lines
Drop repeated lines from lists, exports, URLs, IDs, or logs while keeping the first occurrence and reviewable order.
Remove Empty Lines
Remove blank and whitespace-only rows from pasted text so lists, logs, notes, and imports stay compact.
Remove Extra Spaces
Collapse repeated spaces and tabs, trim padded lines, and tidy copied text from PDFs, emails, CMS fields, and snippets.
Remove Whitespace
Strip every whitespace character from tokens, hashes, serials, identifiers, and strict comparison values.
Remove Line Breaks
Collapse multi-line text into one line for metadata fields, prompts, spreadsheet cells, titles, and compact notes.
Remove Lines Containing
Filter out lines that match a phrase or regular expression from logs, exports, lists, and draft text.
Sort Text Lines
Order line-based text alphabetically, numerically, or in reverse for lists, IDs, keywords, logs, and review queues.
Word Sorter
Sort words from a passage or word list for vocabulary review, classroom exercises, word games, and text cleanup.
Word Frequency Counter
Count repeated words in drafts, transcripts, keyword sets, and passages to spot dominant terms and cleanup needs.
Text Repeater
Duplicate a full text block with custom separators and counts for layout testing, fixtures, training data, and stress checks.
Remove Punctuation
Remove punctuation and symbols from text before simple matching, word counts, classroom exercises, or basic token cleanup.
Typography & Text
Font File Explorer
Inspect font files, preview live text, and review useful font details before you use or ship them.
Unicode Glyph Browser
Browse Unicode characters, inspect glyphs, and copy the symbols you need for design, content, or development work.
Line Height Calculator
Calculate balanced line-height values that improve readability across interfaces, articles, and printed layouts.
Paper Size Guide
Look up standard paper dimensions for A-series, US, and print production formats without hunting through charts.
PX to REM Converter
Convert pixel values to rem units for responsive design systems, accessible typography, and cleaner CSS.
Typography Unit Converter
Convert between typographic units like points, picas, ciceros, agates, inches, and millimeters with ease.
Markdown to HTML
Convert Markdown syntax to clean, semantic HTML with live preview, safe sanitization, and copy or download export.
HTML to Markdown
Convert HTML markup into clean Markdown with GitHub Flavored output, configurable heading and link styles, live preview, and download.
Word Counter
Count words, characters, and reading length quickly when you need cleaner drafts, tighter copy, or publishing checks.
Developer Tools
2FA Live
Generate Time-based One-Time Passwords (TOTP) in real-time. Paste your Base32 secret to see the current OTP, refreshing every period — compatible with Google Authenticator, Authy, and Microsoft Authenticator.
Key Generator
Generate JWT secrets, API keys, service tokens, passwords, and PEM-style key material locally in your browser with per-key regenerate and copy actions.
RSA Key Pair GeneratorNew
Generate real RSA key pairs (2048, 3072, 4096-bit) with PEM PKCS#8 + SPKI, OpenSSH public key, JWK, and SHA-256 fingerprint. Fully local via Web Crypto API for JWT signing, mTLS, SSH access, and JWKS endpoints.
Curl Parser
Parse cURL commands into structured HTTP request details, including method, URL, headers, cookies, query parameters, body, and exportable code.
Cookie Parser
Parse Cookie and Set-Cookie strings, decode encoded values, inspect attributes, and export cookies as JSON, JavaScript, or header text.
Database Connection CheckerNew
Test PostgreSQL, MySQL, MongoDB, and Redis connections, inspect read-only metadata, and convert database URIs for Navicat, TablePlus, DBeaver, DataGrip, Prisma, Laravel, and CLI workflows.
MongoDB ObjectId
Convert, parse and analyze MongoDB ObjectId. Supports single or bulk input (string or object).
MongoDB ObjectId Generator
Generate valid MongoDB ObjectId values randomly, from a timestamp, or in batches for tests, fixtures, and database workflows.
SIP Authorization Tester
Verify SIP digest authentication and generate Authorization header responses with browser-side MD5 calculations.
SIP Message Builder
Build raw SIP requests and responses with editable headers, body content, and automatic Content-Length calculation.
SIP Message Parser
Parse raw SIP messages online and inspect the start line, headers, body, status, method, and protocol fields.
SIP Call Flow Analyzer
Analyze SIP call flows with sequence diagrams, timing metrics, response summaries, and RTP stream hints from SDP.
SIP Header Checker
Validate SIP message headers for malformed Via values, missing branch cookies, Contact hints, Content-Length mismatches, and SDP issues.
SIP Port Scanner
Plan SIP port checks across hosts with TCP, UDP, and TLS profiles, timeout settings, concurrency, response details, and scan logs.
UUID Parser
Parse, validate, and analyze UUID values across v1, v3, v4, v5, v6, v7, and v8 with timestamp, variant, and byte breakdowns.
UUID Generator
Generate bulk UUIDs for v1, v3, v4, v5, v6, v7, and v8 with standard, uppercase, hyphenless, braces, URN, TXT, and JSON output.
WebSocket Tester
Test WebSocket connections from the browser, send text, JSON, or binary messages, inspect responses, and export session logs.
K6 Script Generator
Generate production-ready k6 load test scripts in the browser. Configure load, stress, spike, soak, or smoke scenarios, ramp-up stages, HTTP requests, checks, thresholds, environment variables, and CSV data — then download a runnable k6 script.
Gatling Script Generator
Generate runnable Gatling (Scala) simulations from the browser. Configure injection profiles, scenarios with repeat or during loops, HTTP requests with timeouts, checks, and CSV feeders — then download a complete Simulation.scala file.
Crypto & Security
Impermanent Loss CalculatorNew
Estimate impermanent loss and ROI for liquidity pool positions across AMM pool types with price-change scenarios, fee income, farming rewards, HODL comparison, copy results, and JSON export.
Staking Rewards CalculatorNew
Estimate staking rewards for ETH, SOL, MATIC, ATOM, ADA, and custom assets with static APR references, editable token prices, compounding, validator fees, reward projections, and JSON export.
Mnemonic Phrase Generator
Generate secure BIP39 mnemonic recovery phrases locally in your browser with 12, 15, 18, 21, or 24 words, optional passphrase, checksum validation, QR preview, and offline security guidance.
Gas Fee Calculator
Estimate gas fees for transfers, swaps, NFT minting, bridging, and approvals with static network references, editable gas values, USD estimates, copy actions, and JSON export.
Ethereum Unit Converter
Convert ETH, Wei, Gwei, Kwei, Mwei, Szabo, and Finney values with exact browser-based Ethereum unit calculations, gas fee estimates, copy actions, and JSON export.
Ethereum Address Validator
Check Ethereum wallet addresses, verify EIP-55 checksum formatting, normalize casing, and export structured validation results in your browser.
Transaction Hash Parser
Inspect Ethereum transaction hashes, validate hash format, prepare explorer links, and review sample transaction status, fees, gas, and decoded activity in your browser.
Bitcoin Address Validator
Check Bitcoin address format, checksum, and network compatibility for legacy, SegWit, Bech32, and Bech32m addresses directly in your browser.
Other Tools
Barcode Generator
Generate barcodes including Code 128, EAN-13, PDF417, Aztec, and Data Matrix for packaging, labels, and print.
Meta Tag Generator
Create SEO and social sharing meta tags for websites, landing pages, products, and articles without hand-coding.
QR Code Generator
Create beginner-friendly QR codes for websites, text, Wi-Fi, phone, email, and contacts with EasyQRCodeJS loaded only on the QR tool page.
QR Code Reader
Decode QR codes from images or your live camera. Inspect content type, version, modules, and error correction. History is stored locally only.
Regex Tester
Test regular expressions against sample text, inspect matches, and debug patterns faster while you work.
Password Generator
Generate strong random passwords with length, character set, ambiguity, and batch options that run locally in your browser.
Tailwind CSS Cheat Sheet
Browse common Tailwind CSS utilities so you can find the right classes faster during daily design and development.
Text Scratchpad
Write notes, clean messy text, transform case, sort lines, and reshape content in one flexible browser-based scratchpad.
Calculators
Algebra Calculator
Simplify expressions, factor equations, solve problems, and calculate derivatives with symbolic algebra tools.
Base Converter
Convert numbers between binary, octal, decimal, and hexadecimal for development, education, and troubleshooting.
Encoding Tools
Encode and decode Base64, URL strings, and common hashes when you need quick text transformation utilities.
URL Encode & Decode
Encode URL text, decode percent-encoded URLs, parse every URL field, and reveal readable Base64 values inside paths or query parameters.
JWT Debugger
Decode, inspect, verify, and encode JSON Web Tokens with formatted header and payload output for API debugging.
Graphing Calculator
Plot mathematical functions and explore equations visually when a graph explains more than raw numbers.
Scientific Calculator
Handle everyday scientific calculations with useful advanced functions and a running history you can review.
Time Calculator
Convert timestamps, compare time zones, and do date arithmetic fast when you need precise time calculations.
Unit Converter
Convert units for length, weight, area, volume, data, temperature, and other everyday calculations.
DNS & Network
DNS Lookup
Check the DNS records a public domain publishes, including A, AAAA, MX, NS, CNAME, TXT, and SOA.
MX Lookup
Find the mail servers and priority values that receive email for a domain.
NS Lookup Online
See which name servers are authoritative for a domain and catch delegation mistakes.
CNAME Lookup
Check where a subdomain's CNAME alias points for CDN, SaaS, and hosted app setup.
Online Port Checker
Test whether selected public TCP ports are reachable from the app server.
SMTP Test Tool
Test SMTP connection, TLS mode, authentication, and optional sample email sending.
FTP Test
Test FTP or FTPS login and preview a remote directory listing for a public server.
SPF Checker
Find SPF TXT records and review which senders are authorized for a domain.
My IP Address
Check your public IPv4 and IPv6 address in the browser, inspect connection details, and copy API examples for cURL, JavaScript, Python, and Go.
Hex to IP
Convert a hexadecimal value back into a dotted-decimal IPv4 address for networking and packet analysis.
IP to Hex
Convert an IPv4 address into its compact 32-bit hexadecimal representation.
Binary to IP
Decode a 32-bit binary value or four binary octets back into an IPv4 address.
IP to Binary
Expand an IPv4 address into its 32-bit binary form, grouped per octet for easy subnet reading.
Decimal to IP
Convert a single 32-bit unsigned decimal integer into a dotted-decimal IPv4 address.
IP to Decimal
Convert any IPv4 address into a single 32-bit unsigned decimal integer for storage and indexing.
Octal to IP
Decode octal-encoded IPv4 addresses, dotted or single-value, back into the standard form.
IP to Octal
Render an IPv4 address as four zero-padded octal octets for legacy systems and security review.
IPv6 to Binary
Expand any IPv6 address (including :: shorthand) into a 128-bit binary representation.
Education
Language Experiments
Number Utilities
All Numbers Converter
Convert numbers between binary, octal, decimal, and hexadecimal in one place, with bitwise operations and a 16-bit toggle view.
Decimal to Binary
Convert decimal integers into base-2 binary with BigInt precision for register dumps and bitmasks.
Decimal to Octal
Convert decimal numbers to base-8 octal for Unix permissions, escape codes, and legacy formats.
Binary to Decimal
Read what a binary string means in decimal, supporting separators and arbitrary length.
Binary to Hex
Convert binary values into compact uppercase hexadecimal — the natural form for byte-level work.
Binary to Octal
Group binary digits into base-8 octal — useful for permission masks and three-bit groupings.
Hex to Decimal
Decode hexadecimal numbers into base-10 decimal integers with a step-by-step calculation breakdown and full all-formats panel.
Hex to Binary
Expand hex values into nibble-aligned binary, plus signed/unsigned/Base64/float decoding in one workspace.
Hex to ASCII
Decode hex bytes into decimal ASCII codepoints, plus every other format (text, binary, octal, float, Base64) side by side.
Hex to Text
Convert hex bytes back to UTF-8 text with full multibyte support, plus full all-formats panel for inspection.
Hex to Octal
Convert hex into base-8 octal with side-by-side bit, byte, decimal, and Base64 readings.
Hex to Float
Decode hex bytes as IEEE 754 single or double precision floating-point values with sign, exponent, and mantissa context.
Hex to All
One-page hex inspection: decimal, binary, octal, ASCII, text, signed/unsigned widths, Base64, float — all from a single input.
Octal to Decimal
Decode octal numbers into decimal integers — perfect for translating Unix permission codes.
Octal to Binary
Expand octal digits into 3-bit binary groups for permission and embedded register analysis.
Octal to Hex
Convert octal values into hexadecimal when migrating legacy scripts to modern tooling.
Binary to Text
Decode UTF-8 binary byte strings back into readable text, with multibyte and emoji support.
Text to Binary
Encode any UTF-8 text into space-separated 8-bit binary bytes for puzzles and low-level demos.
ASCII to Text
Decode a list of decimal Unicode codepoints into readable text — emoji and CJK supported.
Char to ASCII
Look up the decimal Unicode codepoint of every character in a string for tests and tickets.
Reverse Hex
Reverse the byte order of a hexadecimal string for endianness flips in protocol and file work.
CSS Tools
CSS Beauty, Minify & Formatter
Beautify, minify, analyze, upload, copy, and download CSS with browser-based formatting and code statistics.
Box Shadow Generator
Design layered CSS box-shadows visually with live preview. Stack multiple inner and outer shadows, tune offset, blur, spread, opacity, and border radius, then copy CSS or Tailwind utility classes.
Border Generator
Design CSS borders visually with per-side widths, eight border styles, color with opacity, and per-corner border-radius. Live preview, real use-case demos, and one-click copy of CSS or Tailwind utility classes.
CSS Filter Generator
Apply CSS filters visually — blur, brightness, contrast, saturate, hue-rotate, grayscale, sepia, opacity, invert, and drop-shadow. Live preview against image, avatar, card, and background; copy CSS or Tailwind classes.
CSS Animation Generator
Build CSS keyframe animations visually. Pick from a library of fade, slide, zoom, bounce, rotate and more, customize duration, easing, delay, iteration, direction, and fill mode, preview live, and copy CSS, HTML, React, or Vue code.
Date Time
Time Converter
Convert Unix seconds, Unix milliseconds, ISO 8601, readable dates, and timezone views for logs, APIs, and scheduling.
Lunar Calendar Converter
Convert between Gregorian solar dates and Chinese lunar calendar dates, browse nearby months, and review festivals, zodiac, lunar phase, and planning details in your browser.
Countdown Timer
Create a live countdown timer for focus sessions, workouts, meetings, presentations, study blocks, and breaks with fullscreen preview, sound alerts, share links, embed code, and image export.
Unix Timestamp Converter
Convert Unix epoch timestamps in seconds or milliseconds into ISO dates, readable times, and timezone-aware references.
Unit Converters
Length Converter
Convert metric, imperial, and nautical distance units including metres, kilometres, miles, feet, inches, yards, and nautical miles.
Weight Converter
Convert mass values between kilograms, grams, milligrams, pounds, ounces, stones, and tonnes for everyday measurement work.
Volume Converter
Convert litres, millilitres, cubic metres, US and UK gallons, quarts, pints, cups, and fluid ounces.
Area Converter
Convert square metres, square feet, square kilometres, hectares, acres, square yards, and square miles.
Data Converter
Convert digital storage and transfer units between bytes, bits, kilobytes, megabytes, gigabytes, terabytes, and petabytes.
Temperature Converter
Convert Celsius, Fahrenheit, and Kelvin with correct scale offsets for weather, cooking, science, and equipment references.
Speed Converter
Convert speed units between metres per second, kilometres per hour, miles per hour, knots, and feet per second.
Why teams use appkiro
Appkiro keeps digital utility work simple: find the right tool, get the output you need, and move on without bloated workflows.
Focused workflows
Open the tool you need, finish the task quickly, and export the result without extra friction.
Built for real work
Use Appkiro for production tasks across images, color, PDF, text, and everyday digital operations.
Private by default
Core workflows stay in the browser so you can move faster and keep routine work self-serve.
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