Privacy Policy

Effective date: 21 August 2026 · Applies to the Markdown Browser Tools browser extension and this website.

The short version

Markdown Browser Tools collects no data. Not usage analytics, not crash reports, not file contents, not file names, not anything. There is no account, no server, and no network traffic initiated on your behalf by the extension.

What the extension does with your files

The extension renders Markdown documents — local .md files, local folders, and Markdown served by websites you have allowed — inside your own browser, on your own machine. Reading, rendering, search and folder listings all happen locally. Nothing you open, and nothing about what you open, is transmitted anywhere.

What the extension stores

Your settings (theme, layout, language), your list of recent and pinned files, and your chosen folder are stored using the browser's extension storage, on your device only. Uninstalling the extension removes them. We cannot see them; they never leave your machine.

Permissions, and why they are asked for

  • Access to file URLs — lets the extension render local .md files and folder listings. It is a browser-level switch you control, and the extension works only with what you open.
  • Access to websites — lets the extension render a Markdown document a website serves you. It checks the page's content type and leaves every ordinary web page untouched. You can narrow site access at any time in your browser's extension settings.
  • Storage — the local settings described above.
  • Scripting — used to load the bundled diagram (Mermaid) and math (KaTeX) renderers into a page only when a document actually needs them. All code ships inside the extension package; nothing is fetched from a server.

This website

markdown-browser-tools.com is a static informational site. It sets no advertising cookies and runs no tracking by default. If privacy-preserving, cookieless aggregate statistics (Plausible) are enabled at some point, they collect no personal data and are covered by Plausible's data policy.

Changes

If any of the above ever changes — for example, if an optional licensing check is added for paid features — this policy will be updated first, with the change described plainly, and the extension's store listing will disclose it.

Contact

Questions: hello@markdown-browser-tools.com.