Before any AI sees your file, MasKey™ removes what your client never agreed to share.
Detect and mask PAN, Aadhaar, mobile, bank account, and 20+ other Indian identifiers from Excel, Word, and PDF files. 100% offline. Nothing leaves your machine.
- 100% offline
- 20+ ID formats
- ICAI-conscious
- Made in India
You uploaded an ITR to ChatGPT for a quick review.
Along with it went your client's PAN, Aadhaar, mobile number, bank account, and every line of their financial life — to servers you don't control, kept indefinitely. One breach. One leaked prompt. One employee at the AI company who shouldn't have seen it. Then what?
ICAI disciplinary action
Unauthorized disclosure of client data breaches the CA Regulations. The Institute doesn't distinguish accidental from deliberate.
Client trust, destroyed
A client's PAN and bank statement finding its way into an AI training corpus is a story that ends one way. And they'll be telling everyone.
Legal liability, yours
DPDP Act. IT Act. Contractual confidentiality clauses. The exposure surface is not theoretical, and it lands on the professional's desk.
Five steps. Zero uploads to strangers.
MasKey runs entirely in your browser. Your files are never uploaded anywhere. The masking key stays on your machine. This is not a promise — it's the architecture.
Upload
Drop your Excel, Word, PDF, or CSV file into MasKey. It runs entirely in your browser.
Auto-mask
MasKey finds 20+ Indian ID formats and replaces each with a token like [PAN_1], [MOBILE_1], [ACCOUNT_1].
Download
You get two files: the sanitized document, and a private masking key (.json) that only you have.
Use any AI
Upload the sanitized file to ChatGPT, Claude, Gemini, or any tool. There's nothing sensitive left to leak.
Re-identify
When the AI returns its analysis, use your private key to map tokens back to the original values.
A tour of MasKey in six screens.
Every screen you'll use — from license activation and choosing which identifiers to mask, to the audit trail and the theme toggle.