Is DeepL safe?

Clean risk

DeepL sends selected page text and editable-field text to DeepL translation and writing APIs after user action.

When you ask DeepL to translate or improve writing, the extension reads the selected page text or text from an input field and sends it with the current site hostname to DeepL. This applies on pages where the extension runs, including regular websites, and the request goes to DeepL's translation service.

DeepLv2.10Firefox Add-ons
3Risk

AI-generated. Findings may contain errors. Those marked Verified have been manually reviewed.

Publishers can request a review.

What it can do

Permissions this extension asks for, as declared in version 2.10. Asking for a permission is not a finding on its own - it is what the extension can do if it chooses to.

  • Read and change your data on every site you visit

    <all_urls> and 1 more

  • Schedule its own background tasks

    alarms

  • Act on the current tab, but only after you click the extension

    activeTab

  • Store data in your browser

    storage

  • Add items to the right-click menu

    contextMenus

  • See the address and title of every tab you have open

    tabs

  • Run its own code inside the pages you visit

    scripting

  • Sign you in with your Google account

    identity

  • Watch every request your browser makes

    webRequest

  • Watch, block and rewrite every request your browser makes

    webRequestBlocking

  • Block and redirect the requests your browser makes

    declarativeNetRequest

Where it sends data

Destinations our analysis observed DeepL contacting. Sending data somewhere is not a finding on its own - an extension that syncs your settings has to talk to its own server - but it is where your data can go, and who else it goes to.

  • www2.deepl.com

    DeepL sends data to www2.deepl.com. 2 other extensions we have analysed send data here.

Updated 21 September 2026amo-3019281