Free · Open source · Runs on your machine
Keep personal data out of your AI prompts.
Redacto finds names, emails, phone numbers, addresses, IBANs and BSNs, swaps them for neat placeholders like [Name#1], and restores the real values in the AI's reply. Everything runs on your own machine.
Your text never leaves your computer. There is no server, no account, and no telemetry. The detection model runs locally, so sensitive data is scrubbed before it ever reaches an AI.
How it works
- 1
Paste & anonymize
Drop in your text and press Anonymize. Every piece of personal data is highlighted in place.
- 2
Review
Click any highlight to keep a value unmasked. You decide what gets hidden.
- 3
Copy to your AI
Copy the masked text and paste it into ChatGPT, Claude, or anything else.
- 4
Restore
Paste the AI's reply back into Redacto and the real values snap back into place.
Private by design
Detection runs on-device with a local model. No uploads, no server round-trips, no telemetry. Redacto works fully offline after the first launch, so your most sensitive documents stay yours.
Open source
MIT licensed. Read every line, build it yourself, or just trust the source on GitHub.
Built for Dutch too
Beyond names and emails, it catches BSN, IBAN, postcode, kenteken and rijbewijs.
You stay in control
Every detected value is shown before you copy. Toggle anything you want to keep.
No install, no payment
Download, open, done. No installer, no account, no subscription.
Questions
Does my text leave my computer?+
No. All detection runs locally on your machine. There is no server and no account, and nothing is uploaded or logged.
Is it really free?+
Yes. Redacto is free and MIT-licensed open source. No payment, no account, no upsell.
Do I need to install anything?+
No installer. Download, unzip, and run. The first launch downloads the language model once (about 1 GB), after which it works fully offline.
Which languages does it support?+
English and Dutch, including Dutch-specific identifiers like BSN, IBAN, postcode, kenteken and rijbewijs.
Can I trust the detection?+
The code is open source, and you review every highlight before copying. You always decide what is masked and what stays.
Download Redacto
Free, open source, and ready to run. Pick your system below.
Built automatically from source on the GitHub releases page.