Local PII Redaction
Use AI with client data.
Without the risk.
Drop a document in. Every name, email, phone number, address, and ID gets replaced with tokens the AI can understand. When you're done, one click brings everything back.
Attached is the project brief for Meridian Consulting. Please review before our call on Tuesday.
The contact on their side is Thomas Richter (thomas.richter@meridian.de). His assistant Jana can be reached at +49 170 882 4410.
Best,
Alex
Click “Protected” to see it work
The problem
You want to run client files through ChatGPT, Claude, or your internal AI. But the documents are full of real names, real email addresses, real phone numbers.
So you either risk it — or you don't use AI at all.
The first option gets you fined. The second one costs you hours every day.
That's what dropredact is for.
Why tokens, not blackouts
Most tools destroy.
This one remembers.
Most redaction tools black out or delete. That kills context — the AI can't tell who's who anymore. “Someone emailed someone about something” isn't useful.
dropredact replaces each name with a numbered token. The AI understands the structure. It knows [CLIENT_1] and [EMAIL_1] belong to the same person. It just doesn't know the names.
When you're done — one click, everything snaps back. No information lost. No context destroyed.
The Token Register
Your decryption key. A persistent, encrypted mapping from every token to every original — across documents, across sessions, across months.
Consistent
Same person = same token in every document. Monday's contract and Friday's email stay in sync.
Reversible
Need the originals back? One click. The register is your undo button.
Encrypted
Lock it with AES encryption. Without your passphrase, it's unreadable.
Per-project
One register per client, per case, per project. Your worlds never bleed.
Three steps. No cloud.
Drop your file
PDF, Word, HTML, or plain text. Drag it in. Language detected automatically.
Names disappear
AI detects every person, email, phone, address, ID, and IBAN. Replaces them with consistent tokens.
Names come back
When you're done with the AI, reverse the redaction. Every token maps back to the original.
See it on a real document
A freelancer's project brief — names, emails, addresses, tax IDs, IBANs. All redacted. All reversible.
Client: Lisa Bergmann, Founder of Nomad Studio
Email: lisa@nomad-studio.co
Phone: +49 151 220 8837
Address: Schillerstraße 41, 50674 Köln
Brand designer: Cem Yılmaz (cem@typewerk.de)
Accountant: Petra Hofmann at Hofmann & Krause Steuerberatung
Tax ID: DE 814 237 561
IBAN: DE89 3704 0044 0532 0130 00
Budget: €14,500 approved on 28 February 2025
Notes: Lisa wants the rebrand finished before the launch event on 15 April. Cem is handling type and logo, I handle web + copy. Send drafts to lisa@nomad-studio.co and CC Petra on anything with numbers.
10 entity types. Checksum-validated.
Three detection layers: neural NER for names, deterministic validators with real checksums for structured data, and a name database spanning 27 European countries.
Person names
Neural NER trained on 7,600+ European names. German compounds, Polish declensions, Finnish agglutination.
Email addresses
Pattern matching. 99.7% precision.
Phone numbers
Google libphonenumber. Per-country validation, not just regex.
Postal addresses
Postal code anchor + street lists + GeoNames city validation.
National IDs
Checksum-validated. Steuer-ID, BSN, CPR, PESEL, personnummer, DNI, codice fiscale — 10 countries.
IBANs
mod-97 checksum. Real validation, not regex.
Credit cards
Luhn algorithm. Catches real numbers, ignores fake ones.
Organizations
Company names, government bodies. Extended mode.
Locations
Cities, regions, landmarks. Extended mode.
URLs
Web addresses in document text.
0
EU languages
0
National ID formats
0+
European names in database
0
Data sent to cloud
Free to use. Pay when your business uses it.
Free
€0
forever
- Desktop app (macOS + Linux)
- CLI for scripting
- All 10 EU languages
- PDF, Word, HTML, text
- Token register + de-redaction
- 10 entity types, checksum-validated
- Runs 100% on your machine
Not a trial. The full engine. One file at a time.
Commercial
€149/year
up to 5 seats
- Everything in Free
- Batch processing — folders at once
- Watch folder — zero-click redaction
- REST API for n8n, Make, Zapier
- Encrypted registers (AES)
- Annual model updates + drift fixes
- GDPR/AI Act regulatory digest
Team
€299/year
unlimited seats
- Everything in Commercial
- Unlimited installs
- No per-seat counting
- Whole team, whole office, every laptop
The software works forever. If you don't renew, you keep everything — the app, your registers, your files. The license is for commercial use, not for access. This is not SaaS.
Your clients trust you with their data.
Keep earning it.
10 EU languages. Reversible tokens. Encrypted registers. Runs on your machine. Free.