DataMask — PII redaction

Strip personal data out of spreadsheets and Word files before they leave the building — without breaking the format.

Format-preserving fakes: phones keep 11 digits, ID cards still pass ISO 7064, bank cards still pass Luhn
Consistent + keyed: the same value maps to the same fake everywhere, so you can still JOIN; reruns are deterministic
Validates by checksum, not by 'looks like 18 digits' — 88 real findings instead of 400 false positives
csv / xlsx / txt / log / json / md / docx; --map file restores the original data; exit 2 on empty under --strict

29 USDT

Pay in USDT (BEP20). The download link unlocks the moment the transfer confirms — no account needed.

What you get

A single Python file plus a one-page README — no framework, no account, no license server.
Sample data and a runnable demo, so you can see the output before you read the code.
Source included. Runs offline on Python 3.9+. Most tools use the standard library only.

unzip datamask.zip && cd datamask
pip install -r requirements.txt   # only if the README lists one
python datamask.py demo/input.csv -o out.csv

One-time payment, no subscription, no seat count. If the file will not run on your machine, reply to the order and it gets fixed or refunded.