Inspect a Markdown document locally for heading structure, missing image text, bare links and readability problems, with a downloadable line-by-line report.
Everything runs locally in this browser: your source text is not uploaded or saved by this tool.
A deterministic browser-only inspection walks the document line by line, ignoring fenced code, then checks heading hierarchy, title count, duplicate headings, image alternative text, bare URLs, trailing whitespace and unusually long source lines.
Run a consistent pre-publication structural check on a README, guide, documentation page or article and retain a line-referenced report for review.
Static syntax can identify likely problems but cannot establish truth, originality, appropriate tone, rendered accessibility or whether a destination URL currently works.
Select Load example to place a deliberately small, non-sensitive input in the editor. Convert it, compare every row and then alter one awkward value—such as a comma, quote or vertical bar—to see how the output is escaped. This makes the conversion behaviour visible before you use your own material.
Markdown tables are a common extension rather than part of every minimal Markdown implementation. Preview the result in the exact renderer—such as GitHub, a documentation platform or a static-site generator—that will publish it.
No account is required and conversion happens in your current browser tab. The tool does not transmit or retain the input, but you should still avoid placing confidential data in any device or browser you do not trust.
For the formal baseline behind portable Markdown, see the CommonMark specification; table behaviour is renderer-specific.