Auto-Redact Screenshot

Cover phone numbers, ID numbers, card numbers and emails recognised in a screenshot.

Redaction & masking Heavy client-side (WASM) tesseract.js OCR + sensitive patterns + Canvas

Tool preview

How to use it

! The OCR engine (~15 MB with the English language data) is downloaded from a public CDN on first use.
! Screenshots with tiny text or heavy compression reduce recognition accuracy.
! Only the built-in patterns are matched; add custom rules with the text mask tool.

Does it work on dark mode screenshots?

Usually, but contrast matters. If recognition misses text, lighten the screenshot first.

What if a number is split across two lines?

Each line is checked separately, so a number broken over a line break may slip through. Check the preview.

Is the image uploaded?

No.

Processing happens in your browser using the File API, WebAssembly and Web Workers. There is no upload endpoint.

Add a use-case, date and recipient watermark to an ID document.

Stamp a purpose and date watermark onto a photocopy.

Lay both sides onto one A4 page, ready to print.