Effective date: 25 September 2026 · Applies to: Nestmark 1.4 and later

Nestmark is a browser extension for highlighting text on web pages. This policy
explains what the extension does with your data. The short version: Nestmark
keeps everything on your device. It collects nothing and sends nothing anywhere.


When you highlight text, Nestmark saves the following locally in your
browser's extension storage (chrome.storage.local / browser.storage.local):

• the highlighted text, a small amount of the text around it, and its position in
  the page's structure (used to find the highlight again when you return to the page);
• the address (URL) and title of the page where you made the highlight;
• the highlight's style and the time you created it;
• any note you add to a highlight;
• your styles, including any you create or edit, and which one is selected.

This data never leaves your device unless you choose to export it.

Notes are private to you. Nestmark never writes a note into the web page or sends
it to the page, so the websites you visit cannot read what you wrote about them.

• It does not send your highlights, browsing history or any other data to
  the developer or to any server. The extension makes no network requests.
• It does not use analytics, tracking, advertising or telemetry.
• It does not require an account.
• It does not sell, share or transfer data to third parties.

| Permission | Why it is needed |
|---|---|
| Access to all websites (<all_urls>) | To draw your highlights on the pages where you made them and restore them when you come back. Page content is read only inside your browser to locate the highlighted text. |
| storage, unlimitedStorage | To save your highlights and styles on your device, without a size cap for large collections. |
| contextMenus | To add "Highlight with Nestmark" to the right-click menu. |
| activeTab | To act on the current tab when you use the toolbar button or a keyboard shortcut. |

• Export (Markdown, CSV, JSON) creates a file that is saved by your browser
  to a location you control. Exported files include your notes, so keep them
  somewhere you trust. Import reads a file you select, locally.
• Read aloud uses your browser's built-in speech engine (the Web Speech
  API). Nestmark sends the text only to that engine. Depending on the voice your
  browser or operating system selects, the browser itself may process that text
  according to its own privacy policy.

You can remove any highlight, all highlights on a page, or everything, from
Nestmark's popup, sidebar or overview page. Uninstalling the extension deletes all
of its stored data.


Nestmark does not knowingly collect any information from anyone, including children.


If this policy changes, the new version will be published at this address with an
updated effective date.


Questions or requests about your privacy: email [email protected].