Privacy · Free browser tool

Sensitive Text Redactor

Find and mask common emails, phone numbers, IP addresses, payment-card-like numbers, URLs, and your own specified terms without uploading the text.

Runs on this device No file upload Free to use

Private workspace

Create a shareable text copy with common identifiers masked locally and a clear receipt of what the rules detected.

Local processing

Ready.

Pattern matching is only a first pass. Read every line before sharing it.

What this tool does

Create a shareable text copy with common identifiers masked locally and a clear receipt of what the rules detected.

Know the limits

Browser processing protects the file from an upload workflow, but the browser, device, output format, and selected settings still matter.

Pattern matching can miss sensitive context and can flag harmless text.
Names, addresses, account identifiers, and unusual formats may require manual review.
This is not AI classification, legal redaction, or a guarantee that the result is anonymous.

Four local steps

01
Paste text without including anything you cannot safely display on your current device.
02
Choose detection categories and add optional custom terms.
03
Create the redacted copy and review every replacement.
04
Edit remaining details manually before copying or downloading.

Clear answers

Does the text leave this browser?

No. Pattern detection and replacement run in the current tab without a submission request.

Can it find every name or address?

No. This version uses explicit patterns and custom terms, not an AI model. Always read the complete result before sharing it.

Are card-like numbers validated?

The tool uses length, formatting, and a Luhn checksum to reduce false matches, but the result still requires manual review.