FormatDogWorkspace

100% SECURE PRIVATE SANDBOX

Auto-Redact Sensitive Data

Instead of drawing every redaction box by hand, let this tool find likely credit card numbers, Social Security numbers, email addresses, and phone numbers first — review what it found, then redact exactly the ones you choose. Entirely in your browser.

No signup · No file limits · Files never leave your device

How It Works

1

Choose Your PDF

It's scanned instantly for patterns that look like card numbers, SSNs, emails, and phone numbers.

2

Review What Was Found

Every match shows as a masked preview — nothing sensitive is displayed in full, and every item has its own checkbox.

3

Redact Selected & Download

Only the items you leave checked get permanently redacted — the same genuine, page-flattening redaction our Redact PDF tool uses.

Frequently Asked Questions

How does it actually detect sensitive data?

Pattern matching against the PDF's extracted text, plus a couple of real checks where they exist: a Luhn checksum for anything shaped like a card number, and the Social Security Administration's own documented invalid-range rules for anything shaped like an SSN. A Luhn-valid, correctly-formatted number is proof it's a validly formed number — not proof it's a real, currently active card.

What will it miss?

Anything without a clean, machine-matchable pattern — names, street addresses, internal account numbers with no standard format. This tool is meant to catch the obvious, well-formatted cases quickly; it's not a substitute for a careful manual pass with our Redact PDF tool on anything that genuinely matters.

Is the redaction real, or just a box drawn on top?

Real. Once you redact a selected match, the page it's on is rebuilt without the underlying text or image data in that area — the same genuine mechanism our Redact PDF tool uses, not a movable rectangle sitting over content that's still there underneath. See how to verify this yourself on any PDF tool, including this one.

Why do I only see the last 4 digits of what was found?

The report masks everything it finds by default — the same convention banks and card issuers already use — since there's no reason to display a full card number or SSN on screen just to confirm it should be redacted.

Is my file uploaded anywhere?

No. Scanning, reviewing, and redacting all happen entirely inside your browser.

Never leaves your device

Running Client-Side Sandbox Engine...

Processing calculations securely within local tab memory