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

Chrome extension by Andrii Kozak · Productivity · Tools

  • Trader

A Chrome extension in Productivity · Tools with 6 users, barely installed.

No site access is declared in the manifest, so it cannot read the pages you open on its own.

What the developer says, and 5 screenshots

Loading from the Chrome Web Store. Open the listing if it does not appear.

Users
6
Rating
5.0 (1 ratings)
Users, last 17 days
+6
Rating, last 30 days
Not watched long enough to say
Version
1.6.0
Updated in the store
2026-09-11
Published
2026-08-17
Manifest
V3
Browser access
2 permissions

How it has moved

Users
+6 since 01.09
0-6 · 8 readings
2026-09-06: released 1.5.02026-09-11: released 1.6.0
  1. 2026-09-010
  2. 2026-09-024
  3. 2026-09-064released 1.5.0
  4. 2026-09-074
  5. 2026-09-085
  6. 2026-09-104
  7. 2026-09-135
  8. 2026-09-176
Rating
+5.00 since 01.09
reviewsrating 0.00-5.00 · 8 readings
2026-09-06: released 1.5.02026-09-11: released 1.6.0
  1. 2026-09-01reviews0rating0.00
  2. 2026-09-02reviews0rating0.00
  3. 2026-09-06reviews0rating0.00released 1.5.0
  4. 2026-09-07reviews0rating0.00
  5. 2026-09-08reviews0rating0.00
  6. 2026-09-10reviews1rating5.00
  7. 2026-09-13reviews1rating5.00
  8. 2026-09-17reviews1rating5.00
Users
+6 since 01.09
0-6 · 8 readings
2026-09-06: released 1.5.02026-09-11: released 1.6.0
  1. 2026-09-010
  2. 2026-09-024
  3. 2026-09-064released 1.5.0
  4. 2026-09-074
  5. 2026-09-085
  6. 2026-09-104
  7. 2026-09-135
  8. 2026-09-176
Rating
+5.00 since 01.09
reviewsrating 0.00-5.00 · 8 readings
2026-09-06: released 1.5.02026-09-11: released 1.6.0
  1. 2026-09-01reviews0rating0.00
  2. 2026-09-02reviews0rating0.00
  3. 2026-09-06reviews0rating0.00released 1.5.0
  4. 2026-09-07reviews0rating0.00
  5. 2026-09-08reviews0rating0.00
  6. 2026-09-10reviews1rating5.00
  7. 2026-09-13reviews1rating5.00
  8. 2026-09-17reviews1rating5.00

A dot marks a day the store showed a different number. Between them the line carries the last one forward: we read every listing more than once a day and record a point only when something moves. History beyond ninety days is in the app.

What it can reach

No site access is declared in the manifest, so it cannot read the pages you open on its own.

  • Open a panel beside the page sidePanel
  • Store data in your browser storage

The full permission history for this extension

Version history

  1. Version 1.6.0
  2. Version 1.5.0

What changed recently

  1. Package size changed
  2. Released version 1.6.0 (was 1.5.0)
  3. Package size changed
Show the remaining 3
  1. Store description rewritten (130 → 120 characters)
  2. Renamed from "ChatDataMask: ChatGPT & Claude Incognito Mode. Prevent AI Leaks (GDPR)" to "ChatDataMask: Data Leak Prevention for ChatGPT & Claude (GDPR)"
  3. Released version 1.5.0 (was 1.4.0)

The publisher

Andrii Kozak.

Like this one

Listings the catalog judges closest in what they say they do.

  1. Privacy Shield for AI Chat Describes nearly the same job, smaller audience 3 users ★ 5.0
  2. GuardIA - European AI Firewall Describes nearly the same job, smaller audience 5 users
  3. Secure Alley - ChatGPT Data Leak Protection Describes nearly the same job, smaller audience 5 users (last published figure)
  4. RedactPrompt Describes nearly the same job, smaller audience 271 users ★ 5.0
  5. ChatGPT Privacy Shield Describes nearly the same job, smaller audience 15 users ★ 5.0

The top 5 only. The full comparison, with why each one is close, is on the alternatives page; ranking a whole neighbourhood by your own criteria is in the app.

Is this your extension?

Connect it to Ext Ops Panel and see installs, uninstalls and uninstall reasons as events arrive, not as a weekly summary.

See what the panel does

Figures come from our own daily pass over the public Chrome Web Store listing, last read on . We publish no contact details for extension developers.