Markdown Viewer & Editor

Why use this tool

• Your document never leaves the device

  The file is read with the browser's own file APIs and rendered in the page. Nothing is uploaded — which matters when the Markdown is a draft contract, a postmortem or an unpublished post.
• Read and edit in one place

  Side-by-side source and rendered preview with synchronised scrolling, so you can fix a typo without leaving the page you were reading.
• Save back to the original file

  On Chromium browsers a file opened through the picker can be written back in place. Everywhere else you get Save As or a download — and the button says which.
• Export that actually stands alone

  Exported HTML carries its own styles and syntax highlighting inline, so it renders identically with no network access.

How it works

1. 1Drop a .md file, or open one with the file picker.
2. 2Read the rendered preview beside the source.
3. 3Edit on the left; the preview updates as you type.
4. 4Save back to the file, export HTML, or print to PDF.

Best practices

• Open through the file picker rather than dragging if you want Save to overwrite the original — drag-and-drop cannot grant write access.
• Fence your code blocks with a language tag to get syntax highlighting in both the preview and the export.
• Use Print / PDF for sharing a read-only copy and Export HTML when the recipient needs to open it offline.
• Your draft is kept in this browser, so a refresh will not lose work — but it is not a backup.

FAQ

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