Does my workbook leave the browser?

Uploaded .xlsx and .xls files are parsed entirely in your browser. The Extract from URL tab is the only path that touches the server, and only to proxy the URL you supply so CORS does not block direct fetches. Nothing is stored.

Which output format should I pick?

Pipe (GitHub) emits the standard | header | divider | rows | format that GitHub, GitLab, Notion, and Obsidian render. Grid emits an ASCII grid table that is easier to read in raw text and required by some reStructuredText converters. Simple emits whitespace-aligned columns without separators. HTML Table is for emails, CMS rich-text editors, or HTML reports.

How are line breaks and pipe characters handled?

Pipe characters in cell content are escaped as \| so they don't break the table. Line breaks are joined with spaces, or replaced with when Wrap long text is on so multi-line cells render correctly on GitHub.

What does Align columns do?

Pads each cell to the longest value in its column so the raw Markdown stays human-readable. Disable it for the smallest payload — GitHub still renders pipe tables without padding.

How are dates handled?

Workbooks are parsed with cellDates enabled, so true date cells become Date objects and are emitted as ISO 8601 strings (for example 2024-03-18T00:00:00.000Z). Format dates in Excel before exporting if you need a different display.

Can I export every sheet at once?

Switch sheet tabs and copy or download each sheet individually. Each sheet emits its own Markdown table. You can then concatenate them in your editor with `## Sheet Name` headings.

What size files are supported?

Up to 25 MB for both upload and URL fetch. Workbooks parse incrementally inside the browser; close the tab to release memory after large files.

appkiro.com

Data

Excel から Markdown への変換

Data

Excel データを Markdown にブラウザ内で変換します。API レスポンスのフォーマット変換、フィクスチャ整理、マイグレーション作業に向いており、インデントや引用符、エスケープのオプションも揃っています。

Input Excel

Example workbook loaded.

products.xlsx5 rows - 5 columns

#	sku	name	category	price	in_stock
1	P-001	Wireless Mouse	Electronics	19.99	true
2	P-002	USB-C Hub	Electronics	34.5	true
3	P-003	Notebook A5	Stationery	4.25	false
4	P-004	Mechanical Keyboard	Electronics	89	true
5	P-005	Desk Lamp	Home	27.9	false

Output Markdown

Excel to Markdown converts .xlsx and .xls workbooks into clean Markdown tables, grid tables, simple whitespace tables, or HTML tables — entirely in your browser. Drop your spreadsheet, fetch a Google Sheets link, or paste cells from the clipboard, and copy ready-to-paste output for READMEs, GitHub issues, Notion, Obsidian, Jira, or static-site docs.

Why this tool exists

Hand-typing pipe characters, getting alignment rows right, and chasing down stray newlines wastes hours every week. This tool collapses the loop into one page: developers paste tables into READMEs, analysts drop quarterly numbers into Notion, and PMs convert OKR sheets into ticket descriptions — without scripts, plugins, or sending data to a server.

Workflow at a glance

Pick an input method: paste from clipboard, fetch a Google Sheets / public xlsx URL, or upload a workbook.
Inspect the parsed sheet — switch sheets, search rows, hide unwanted columns.
Tune Markdown Settings: code style, alignment, header row, padding, line break handling.
Copy to clipboard or download a .md / .html file.

When to flip each option

Pipe (GitHub) — default for GitHub, GitLab, Notion, Obsidian, Jira, and most Markdown renderers.
Grid — ASCII grid for readable raw text; required by some reStructuredText converters.
Simple — whitespace-aligned columns without separators; great for plain-text logs and reports.
HTML Table — for emails, CMS rich-text editors, and HTML-only renderers that don't parse Markdown.
Column alignment — Auto right-aligns numeric columns; pick Left/Center/Right when team conventions demand it.
Align columns — keep on for readable raw output; turn off for the smallest payload.
Preserve line breaks — keep on so multi-line cells render as <br>; turn off to flatten newlines into spaces.

Tips that save real time

Hide noisy columns with the chip toggles before exporting to keep tables compact.
For multi-sheet workbooks, copy each sheet separately and prefix with ## Sheet Name.
Excel date cells emit as ISO 8601 strings — format dates in Excel before exporting if you want a different display.
For small embeddable snippets, switch to Simple style and turn alignment off.

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