Markdown formatter and linter
Format Markdown consistently and identify skipped heading levels or missing image descriptions.
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Keep this page handy for next time.
- On a computer
- Press Ctrl + D, or Command + D on a Mac.
- On a phone or tablet
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A bookmark saves the page link. Save any tool results separately.
How to use this tool
- Paste Markdown source.
- Run formatting to normalise wrapping, lists and tables.
- Review warnings for skipped heading levels and images without descriptions.
Things to know
- Lint checks cover heading order and image alternatives; they are not a comprehensive editorial or accessibility audit.
- Each text input accepts up to 5 MiB. Output is limited to 25 MiB and combined text settings to 1 MiB.
- Markdown parsing accepts 100,000 lines and syntax markers, 128 quote levels and 512 leading spaces per line.
- Formatting accepts up to 1 MiB of Markdown. This parser has a lower input limit than simple text transformations.
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