Black out text in a PDF
Permanently remove the sensitive text from a PDF — not just cover it — automatically and in your browser.
Drop a PDF here, or click to choose a file
Your file is processed in your browser and is never uploaded.
Drawing a black rectangle over text in most editors leaves the words intact underneath, where they can still be copied or searched. AnonymousPDF blacks out information the safe way: it removes the underlying text from the file and rebuilds the page, so it is genuinely gone.
You do not have to mark anything by hand — the tool detects sensitive data automatically (names, emails, phone numbers, IBANs, IDs, dates and more) and removes it. It runs entirely on your device, so confidential files stay private.
1. Drop your PDF
Choose a file or drag it onto the page. It opens locally — nothing is sent to a server.
2. Automatic detection
Pattern matching and an on-device AI model locate the sensitive text for you.
3. Download or copy
Get a redacted PDF with the text truly removed, or copy the cleaned text.
Frequently asked questions
Does the text stay under the black box?
No. Unlike a drawn rectangle, this removes the text from the file, so nothing can be copied or recovered.
Can I choose what to black out?
The tool detects sensitive data automatically; always review the result before sharing.
Is anything uploaded?
No, it is processed locally in your browser.
How much does it cost?
Nothing — it is free, with no sign-up.
100% in your browser
Files are processed on your device and never uploaded to any server.
Free, no sign-up
No account, no email, no watermark. Just open it and go.
Real redaction
The underlying text is removed, not just hidden behind a black box.