# Auto-redact PII

> Detect and permanently black out common PII patterns in a PDF. Free auto-redact — runs locally, no upload, no watermark.

Canonical: https://mypdf.space/tools/auto-redact-pii
Last updated: 2026-10-26

## Short answer

Auto-redact PII runs entirely in your browser. Detect SSNs, emails, phones, and cards — then permanently black them out on matched pages. No account, no watermark, and the file never leaves your device.

## About this tool

Detect SSNs, emails, phones, and cards — then permanently black them out on matched pages.

Detect common PII patterns, then permanently black them out on matched pages.

Detect common PII patterns (emails, phones, SSNs, cards) across split text runs, then permanently black them out on matched pages. Joining text items helps catch patterns split across glyphs. This is pattern-based — not a guarantee of every secret. Always review before sharing. Matched pages are rasterized; untouched pages stay as-is.

## How to use

1. Open a PDF with selectable text.
2. Review detected matches and toggle pattern types.
3. Apply redaction and download after checking every page.

## What you need

- One PDF with selectable text

## Notes

- Joins PDF text items before matching so emails/phones split across glyphs are still found.
- Still pattern-based — not a guarantee of every PII form. Always review before sharing.
- Matched pages are rasterized so blacked-out text is destroyed; untouched pages stay as-is.

## FAQ

### Is auto-redaction permanent?

Yes on matched pages — those pages are rasterized so blacked-out text is destroyed, not just covered. Always review before sharing.

### Can non-PII get redacted?

Sometimes. Invoice numbers can look like cards; version strings can look like IPs. Toggle pattern types off before you run.

### Does auto-redact upload my PDF?

No. Detection and redaction run in your browser. You can download a privacy receipt afterward.

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