Is Wordtune: AI Paraphrasing and Grammar Tool safe?

Medium risk

Wordtune captures the full HTML content of AI chatbot pages and transmits it to its own servers.

When a user visits a whitelisted AI chatbot site (including ChatGPT, Claude, Gemini, Copilot, Perplexity, and others), Wordtune's content script monitors DOM changes and periodically collects the page's full HTML, readable text, URL, and title. This data is sent to api.wordtune.com/reader/insights along with the authenticated user's session identifiers. The whitelist of covered sites is fetched remotely from Amplitude on each page load and can be silently expanded to additional domains by Wordtune at any time.

Part of this rating comes from analysis signals we haven't published as detailed findings yet.

Wordtunev9.19.0Chrome Web Store
45Risk
Who publishes it

AI21 LABS, INC. - no other listings under this identity, 9 shared hostnames

What this publisher told the store about itself, and the other listings that told it the same thing.

Publisher
Wordtune
Declared legal entity
AI21 LABS, INC.
Registered address
1 Bush St #1200, San Francisco, CA 94104-4493, US
Registered contact
AI21 LABS, INC.

Shared hosts - 9 hostnames

Hostnames hardcoded in this extension that few other listings call. That can mean one operator behind both, and it can equally mean a small shared vendor, so it is context rather than a conclusion. Hosts that many listings call are left out: they are services, not connections.

api.wordtune.com
Also called by 2 other listings
app.wordtune.com
Also called by 2 other listings
chromium-extension.wordtune.com
Also called by 2 other listings, including Wordtune: AI Writing, Paraphrasing & Grammar Tool
maccabi-dent.com
Also called by 2 other listings, including Wordtune: AI Writing, Paraphrasing & Grammar Tool
static-design-system.wordtune.com
Also called by 2 other listings, including Wordtune: AI Writing, Paraphrasing & Grammar Tool
support.wordtune.com
Also called by 2 other listings, including Wordtune: AI Writing, Paraphrasing & Grammar Tool
ai21.com
Also called by 3 other listings
api.stigg.io
Also called by 4 other listings, including Guidde
wordtune.com
Also called by 4 other listings

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 9.19.0. 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

    *://*/* and 1 more

  • Read and change your data on wordtune.com

    https://*.wordtune.com/*

  • Read and change your data on every secure site you visit

    https://*/*

  • Read and change cookies, including the ones that keep you signed in

    cookies

  • Store data in your browser

    storage

  • Run its own code inside the pages you visit

    scripting

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

    tabs

  • Show a panel beside the page

    sidePanel

Where it sends data

Destinations our analysis observed Wordtune 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.

  • api.wordtune.com

    Wordtune sends data to api.wordtune.com. 2 other extensions we have analysed send data here.

  • api.lab.amplitude.com

    Wordtune sends data to api.lab.amplitude.com. One other extension we have analysed sends data here.

Updated 30 September 2026nllcnknpjnininklegdoijpljgdjkijc