Anonymize Sensitive Data

Mask PII in text before sharing with LLMs or external parties

Offline Copy — Text Masking Only

This file runs entirely on your computer. No network connection is required, no data is sent anywhere, and nothing is stored. PDF redaction is not available because it requires the server-side redactor.

100% Private — Browser-Only Processing

Text masking happens entirely in your browser. Nothing is sent to any server. You can confirm this by opening your browser's Network panel and watching zero requests appear while you mask. When you close this tab, everything disappears.

① Paste Your Sensitive Text

Auto-detects: SSN, Email, Phone, IP, DOB, MRN, Account, Credit Card, Driver's License

All processing happens locally.

Configure Masking

Presets

Detection Types

Always Mask (inclusions — override pattern detection, but exclusions take precedence)

    Never Mask (exclusions — take precedence over pattern detection and always-mask)

      This stores your always-mask and never-mask lists in the browser's localStorage. It is off by default because those lists often contain the very secrets Scrambler exists to protect.