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appkiro.comDrag and drop your video file here
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Supported: MP4, WebM, MOV, MKV
Max file size: 2GB
Video preview
Select a video to preview the output frame.
Original: -
Output: -
Aspect: Original
Fit: Contain
Resized video will appear here
Videos selected from your device are processed locally in your browser. We do not upload or store your files.
Video Resizer changes the resolution, frame shape, and fit behavior of a video in the browser. It is useful when a clip is too large, the wrong aspect ratio, or needs a standard size before uploading to a website, course, product page, or social platform.
The tool exports a new MP4 video with the selected width, height, fit mode, frame rate, bitrate, and optional metadata removal.
Creators, ecommerce teams, support teams, teachers, and developers can prepare videos without installing a desktop editor.
Resize when you need a smaller file, a 720p or 1080p deliverable, a square preview, a vertical crop, or a consistent output size across many clips.
Local files stay on your device. Remote URL mode is browser-first and depends on the source server allowing direct CORS and Range access.
Upload from device is best for private videos. From URL is best for public direct video links, not normal streaming pages.
Preset chooses common output sizes, Custom Size lets you enter exact dimensions, and Percentage scales the source up or down proportionally.
Resolution controls pixel dimensions. Aspect ratio controls the frame shape, such as 16:9, 1:1, or 9:16. Keeping the original aspect ratio avoids unwanted distortion.
Contain keeps the entire source visible, Cover fills the output frame and may crop edges, and Stretch forces the frame to the exact output shape.
Frame rate affects motion smoothness. Bitrate affects quality and file size. Auto is usually safest unless you have a specific delivery requirement.
Metadata removal avoids copying common descriptive tags into the resized MP4. It does not change visible video frames.
No. Local files are decoded, resized, encoded, and downloaded in your browser. URL mode only reads the remote file from its original server.
Use 720p for smaller sharing files, 1080p for general HD delivery, 1440p or 4K when the source is high quality and you need a larger output.
Contain preserves the full picture, cover fills the output and may crop edges, and stretch forces the exact dimensions but can distort people or objects.
The URL must point directly to a video file and allow browser CORS plus Range requests. Streaming pages and private CDNs often block browser tools.
No. Resizing can make dimensions smaller or larger, but it cannot recreate detail that is missing from the original video.
Encoding support depends on the browser, operating system, hardware acceleration, codec, resolution, and available memory.
Yes. Enable remove metadata in advanced options to avoid copying common descriptive tags into the new output file.
No. The original file remains untouched. The tool creates a new resized MP4 download.