Gemini Privacy — Use Google's AI Without Handing Over Your Data
ChatWall is the privacy firewall for Google Gemini. It removes names, emails, IBANs, secrets and 25+ other PII types before your prompt leaves your browser — and restores them in the answer. You get Gemini's quality without giving Google your raw client or employee data.
gemini.google.com can be reviewed by human raters and stored for up to 18 months on consumer plans. Masking PII on-device is the only way to keep it out.
How ChatWall protects Gemini conversations
- Isolated input. You type into a secure ChatWall overlay that gemini.google.com's scripts cannot read.
- On-device masking. Names, emails, phone numbers, IBANs, credit cards, SSNs, API keys, IP addresses and 20+ more entity types are tokenized locally.
- Anonymized prompt sent to Gemini. Google receives
[NAME_1],[EMAIL_1]— not the originals. - Reversible answers. Gemini's response is unmasked locally in a secure overlay, so the experience feels native.
Gemini privacy at a glance
| Concern | Default Gemini | With ChatWall |
|---|---|---|
| PII visible to Google | Yes | No (tokens only) |
| Possible human review of prompts | Yes | Tokens are reviewed, not raw data |
| Data residency for raw PII | Google data centers | Your browser only |
| Open-source verifiable | No | Yes (GitHub) |
FAQ
Does ChatWall need a Google account or API key?
No. The extension works on the standard gemini.google.com interface with whatever account you already use. Nothing is sent to Google or ChatWall servers — masking is 100% browser-local.
Will Gemini still answer well over masked text?
Yes. Gemini handles placeholder tokens ([NAME_1], [IBAN_1]…) without losing reasoning quality. ChatWall restores the originals in the response so the answer is readable.
What about Gemini in Google Workspace?
The browser extension covers the Gemini web app. For Workspace-integrated Gemini (Docs, Gmail) and API access, deploy ChatWall Box as a corporate gateway so every request is filtered before it leaves your network.
Does Google's "don't use my data for training" toggle solve this?
It limits training use — but the raw prompt still leaves your machine and is processed (and often retained) on Google servers. ChatWall ensures the raw PII never leaves your browser in the first place.