# Privacy Policy — Markdown Toolkit

**Last updated:** 19 July 2026

Markdown Toolkit ("the Extension") is a browser extension that renders Markdown
files (`.md`, `.markdown`, `.mdx`) into a formatted, readable preview. This
policy explains what the Extension does — and does not — do with your data.

## Summary

**The Extension does not collect, store, transmit, or sell any personal data.**
Everything happens locally, inside your browser, on your device. There are no
servers, no analytics, no tracking, and no user accounts.

## What data the Extension accesses

To render a document, the Extension reads the content of the Markdown file or
page you open. This content is processed **entirely on your device** to produce
the preview and is **never sent anywhere**.

The Extension does not access, read, or modify pages that are not Markdown
documents.

## Data storage

The Extension stores your **preferences only** — such as the selected theme,
font size, whether preview is enabled, and your allow-list. These settings are
saved using Chrome's `storage.sync` API, which syncs them across your own
devices through **your own Google account**. The developer has no access to this
data.

No document content is ever stored.

## Data sharing and selling

The Extension does **not**:

- Collect or transmit any personal or usage data to the developer or any third
  party.
- Sell or transfer user data to third parties.
- Use or transfer user data for any purpose unrelated to rendering Markdown.
- Use or transfer user data to determine creditworthiness or for lending
  purposes.

## Network activity

The Extension does not make network requests to any external server as part of
its normal operation. All required assets (fonts, stylesheets, syntax
grammars, diagram and math libraries) are bundled inside the Extension package
and loaded locally.

> Note: The optional "Export to HTML" feature generates a standalone `.html`
> file that you download. That exported file references a public stylesheet for
> math rendering; this only applies to the file you export and open yourself,
> not to the Extension's own behavior.

## Permissions

- **storage** — to save your preferences locally and sync them via your own
  Google account.
- **contextMenus** — to add a right-click shortcut to the settings page.
- **Host / content-script access** — required so the Extension can detect and
  render Markdown files (`.md`, `.markdown`, `.mdx`) on any site or local file.
  It activates only on Markdown documents and does not read other pages.
- **Access to file URLs** (optional, enabled by you) — to preview local
  Markdown files opened via `file://`. File contents are processed locally and
  never transmitted.

## Open source

Markdown Toolkit is open source under the MIT License. You can review exactly
what it does at:

https://github.com/boykioyb/markdown-toolkit

## Changes to this policy

If this policy changes, the updated version will be published at this same URL
with a new "Last updated" date.

## Contact

Questions or concerns? Please open an issue at
https://github.com/boykioyb/markdown-toolkit/issues