PII Masking Tool
Enter text and an explicit rule to mask matching content in your browser.
Masks only the rules you provide. It does not identify every sensitive detail; processing stays in this browser.
A QUICK WALKTHROUGH
How to use this tool
- Paste text you are allowed to process.
- Choose literal or regular-expression mode and enter one rule.
- Review the original and masked comparison.
Explicit rules only
The tool masks literal or regular-expression matches that you provide. It does not identify every PII category, infer sensitive information, or include a global identity-data dictionary.
Review before sharing
The original and masked text are shown together so you can inspect the result. Regex rules can match more or less than expected; review carefully.
Local browser processing
Text stays in this browser and is not sent to a server or saved by the tool.
GOOD TO KNOW
Common questions
Does it find all PII?
No. It only masks matches from your chosen rule and does not claim complete sensitive-data detection.
Can I use regular expressions?
Yes. Patterns run with global and Unicode flags; malformed expressions are rejected.
Does it upload my text?
No. Processing is local to this browser.