Markdown Link Checker

Find broken links in a Markdown file before you publish it

A readme with a dead link, or a wiki page pointing to a heading you renamed months ago, is easy to miss until a reader hits it. The Markdown Link Checker scans a document line by line and reports which links work and which do not.

Upload a single .md or .markdown file, or a .zip of a whole folder, and the checker lists every link, image and reference definition it finds. Web links are visited to confirm they respond; heading anchors, such as a link to a section further down the page, are matched against the document's own headings. There is one option, checking web links, on by default; turn it off for a faster, internal-only pass. With a single file, links to other local files cannot be confirmed and are flagged as skipped. Upload a .zip of the project instead, and the checker follows relative links across every Markdown file inside it, including a link into another page's specific heading. The result is a table with a line number, the link, its status, ok, broken or skipped, a note, and a summary count.

Nothing installs and nothing runs in your browser; the file is checked on our servers and removed within 60 minutes. If the report also turns up messy spacing or heading structure, clean that up first with the Markdown Linter and Formatter.