Data masking for PDF documents
Mask personally identifiable information (PII) in a PDF automatically — without sending your data to a cloud service.
Drop a PDF here, or click to choose a file
Your file is processed in your browser and is never uploaded.
Data masking removes sensitive values so a document can be shared, reviewed or archived without exposing real personal information. AnonymousPDF masks PII in PDFs by detecting it and removing it from the file.
It recognises structured identifiers — email addresses, phone numbers, IBANs, card numbers, IP addresses and ID or reference numbers — and uses an on-device AI model to catch names, organisations and locations. All masking happens in your browser, so the original data is never transmitted.
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
What counts as PII here?
Contact details, financial identifiers (IBANs, cards), network identifiers (IPs), ID and reference numbers, and names, organisations and places.
Is the original data sent to a server?
No. Detection and masking run locally in your browser.
Can I get the masked text, not just a PDF?
Yes — use 'Copy text' to get the masked text with labels like [NAME] and [EMAIL].
Is it free for business use?
Yes, it is free to use. For sensitive workflows, always review the output before sharing.
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.