Let AI read the numbers. Not the names on them.

Summarise the ledger, draft the client letter and check the rule, with tax identifiers and bank details replaced before anything is sent.

Start free in the browser Documents and folders

What you have

Payroll query for Ines Duarte, NIF 48023306L, salary paid to ES91 2100 0418 4502 0005 1332, mobile 612 345 678.

What the assistant receives

Payroll query for ⟦PERSON_1⟧, NIF ⟦DNI_NIF_1⟧, salary paid to ⟦IBAN_1⟧, mobile ⟦PHONE_1⟧.

Synthetic. The reply comes back with the tokens in it and the real values are restored on your machine.

Built for the formats: Country packs for Spain, the US, the UK, France, Germany, Turkey and Italy recognise national identifiers as identifiers rather than as digits. Spain shipped first, so NIF and NIE are first-class.
The numbers survive: What gets masked is who the figures belong to. Amounts stay usable, so a ledger summary comes back structurally correct and the real details are restored on your side.
Format-valid when you need it: Pseudonymised mode substitutes a plausible NIF for a real one, so the model treats the text as ordinary. Tokenised mode makes the veil visible, so you can check it before sending.

A practice runs on identifying data: tax identifiers, bank details, payroll figures, home addresses. The files are made of exactly what should never be pasted into a chatbot.

The free tier of the extension needs no key and no account, so trying this on a real ledger costs two minutes.

What detection catches, and what still slips through, is measured and published on the benchmarks page.

What people ask first

Does masking break the numbers the AI needs to reason about?

Amounts and figures the model needs are left usable; what gets masked is who they belong to, the names, identifiers and account details. In pseudonymized mode even those remain format-valid, so a spreadsheet summary or a drafted letter comes back structurally correct and the real details are restored on your side.

Are Spanish tax identifiers like NIF and NIE actually detected?

Yes, Spain shipped as the first country pack, and NIF and NIE formats are recognised as identifiers rather than random strings. The same applies to the other country packs, and per-language detection results are published on the benchmarks page.

Can my whole team use it, and what does it cost?

The browser extension masks for free with no account or key. Paid licences unlock the desktop app and are per machine, with local-currency pricing on the pricing page. There is no per-seat platform to administer, which for a small practice is rather the point.

Request a demo

See it work on your own data.

Tell us what you work with and we will walk you through it on a call, on your own files. Nothing leaves your machine while we do.

Your address is used to reply to you, and for nothing else.