Is my data sent to a server?

No. All redaction is performed in your browser using JavaScript regex. Nothing is uploaded.

Can I add my own patterns?

Yes. Enter a label and a JavaScript regex string in the custom pattern section. Invalid regex is caught before it's applied.

Does it redact inside JSON values?

Yes. The redactor treats the entire input as plain text and replaces matching patterns regardless of structure. JSON keys are not matched — only values.

How accurate is credit card detection?

The pattern matches 13-16 digit sequences. It may produce false positives on other numeric strings. For production compliance use cases, consider a dedicated library.

PII Redactor - Sensitive Data Masker

Redact emails, SSNs, credit cards, IP addresses, and phone numbers from text and logs. Add custom regex patterns. Runs entirely in your browser.

How to use

1
Paste or upload your text
Enter text, log lines, or JSON directly or upload a file.
2
Choose what to redact
Toggle built-in filters for emails, IPs, SSNs, credit cards, and phone numbers. Add custom regex patterns for domain-specific data.
3
Download the redacted output
Click Redact and download the result. The stats panel shows exactly how many items were masked by type.

Why use this tool?

Redacts emails, IPv4/v6, US SSNs, credit card numbers, and phone numbers in one pass
Custom regex patterns for domain-specific identifiers
Configurable replacement placeholder — use [REDACTED], ***, or any custom string
Runs entirely in your browser — sensitive data never leaves your device

Frequently asked questions

Is my data sent to a server?: No. All redaction is performed in your browser using JavaScript regex. Nothing is uploaded.
Can I add my own patterns?: Yes. Enter a label and a JavaScript regex string in the custom pattern section. Invalid regex is caught before it's applied.
Does it redact inside JSON values?: Yes. The redactor treats the entire input as plain text and replaces matching patterns regardless of structure. JSON keys are not matched — only values.
How accurate is credit card detection?: The pattern matches 13-16 digit sequences. It may produce false positives on other numeric strings. For production compliance use cases, consider a dedicated library.

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