Extension Tracker

ChatDataMask: Data Leak Prevention for ChatGPT & Claude (GDPR)

6 users Rated 5.00 from 1 rating Last updated 3 Nov 2026

By Andrii Kozak Live in the Chrome Web Store lnjfmiiepenimkkfakanmjmegbjkcbad Search Google ↗ Last checked 4 Nov 2026, 05:51 UTC

The listing

What the Chrome Web Store shows, as of the last check

Local PII masking via tokenization: redact client names, contracts & financial details before ChatGPT, Claude or Gemini see themSummary from the listing
Developer
Andrii Kozak
Enhanced Safe Browsing
Trusted. What this means →
Category
Productivity › Tools
First published
17 Aug 2026
Last updated
3 Nov 2026
Version
2.1.0
Size
995 KiB
Minimum Chrome
116
Languages
5 languages

Deutsch, English, español, polski, українська

Website
chatdatamask.com
See Chrome Web Store page ↗ View its code or download CRX ↗
Users over time As shown on the Chrome Web Store
456Tracking began 27 Sep 202627 Sep4 Oct11 Oct18 Oct25 Oct1 Nov2026-09-27: 5 users2026-10-05: 4 users2026-10-18: 6 users2026-10-29: 5 users2026-11-01: 4 users2026-11-04: 6 users2026-11-04: new version2026-11-01: new version2026-10-31: new version2026-10-29: new version2026-10-18: new version2026-10-05: new version6456Tracking began27 Sep11 Oct25 Oct2026-09-27: 5 users2026-10-05: 4 users2026-10-18: 6 users2026-10-29: 5 users2026-11-01: 4 users2026-11-04: 6 users2026-11-04: new version2026-11-01: new version2026-10-31: new version2026-10-29: new version2026-10-18: new version2026-10-05: new version6
Average rating
4.804.905.0027 Sep11 Oct25 Oct5.004.804.905.0027 Sep11 Oct25 Oct5.00
Number of ratings
127 Sep11 Oct25 Oct1127 Sep11 Oct25 Oct1
New version One point per check. Source: the extension's public Chrome Web Store listing.
Show the numbers
CheckedUsersRatingRatings
2026-11-0465.001
2026-11-0145.001
2026-10-31–5.001
2026-10-2955.001
2026-10-1865.001
2026-10-0545.001
2026-09-2755.001
Users, 7 days
+2
since a week ago
Users, 30 days
+2
+50.0%
Rank
#187,587
by users, of 289,024 extensions
In its category
#71,406
of 114,373 in Tools

What changed

Every change found on a check, newest first

  1. Now trusted by Enhanced Safe Browsing.

    New version 2.1.0, replacing 2.0.3.

  2. New version 2.0.3, replacing 2.0.2.

  3. New version 2.0.2, replacing 2.0.1.

  4. New version 2.0.1, replacing 2.0.0.

    Added the permission contextMenus.

  5. New version 2.0.0, replacing 1.7.0.

    The summary on the listing changed.

    Added the permission scripting.

    Added the sites https://chatgpt.com/*, https://claude.ai/*, https://gemini.google.com/*.

    Minimum Chrome version raised from 114 to 116.

    The developer's contact email changed.

  6. New version 1.7.0, replacing 1.6.0.

    Added the permissions clipboardRead, clipboardWrite.

    Added the site https://analytics.chatdatamask.com/collect.

    The developer's website link changed.

Developer history

Moves to another publisher account and new contact emails, newest first

  1. The contact email changed.

    What it can access changed the same day.

We know contact emails only by a keyed hash, so they're never shown. Recent account and contact changes →

What it can access

From the extension's manifest, in plain language

Sites
  • https://analytics.chatdatamask.com/collectanalytics.chatdatamask.com
  • https://chatgpt.com/*chatgpt.com
  • https://claude.ai/*claude.ai
  • https://gemini.google.com/*gemini.google.com
Browser features
  • clipboardReadRead what you copy
  • clipboardWriteChange what's in your clipboard
  • contextMenusAdd items to the right-click menu
  • scriptingRun scripts on sites it can reach
  • sidePanelShow a side panel
  • storageSave settings and data in your browser

About this data

Collected from the extension's public Chrome Web Store listing. It's checked every month, and again whenever a new version appears. Last checked 4 Nov 2026, 05:51 UTC; next check around 3 Dec 2026.

How we collect the data

Cite this page

Citation
Extension Tracker. “ChatDataMask: Data Leak Prevention for ChatGPT & Claude (GDPR)” (lnjfmiiepenimkkfakanmjmegbjkcbad). Chrome Web Store data, last checked 2026-11-04. https://extensiontracker.com/extension/lnjfmiiepenimkkfakanmjmegbjkcbad. Accessed 2026-11-08.
BibTeX
@misc{extensiontracker_lnjfmiiepenimkkfakanmjmegbjkcbad,
  title   = {ChatDataMask: Data Leak Prevention for ChatGPT & Claude (GDPR) (lnjfmiiepenimkkfakanmjmegbjkcbad)},
  author  = {{Extension Tracker}},
  year    = {2026},
  note    = {Chrome Web Store data, last checked 2026-11-04},
  url     = {https://extensiontracker.com/extension/lnjfmiiepenimkkfakanmjmegbjkcbad},
  urldate = {2026-11-08}
}

The data is free to reuse under CC BY 4.0.

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