WhiskFile security tools: password protect, watermark, and secure your PDFs.
Add a password to protect your PDF
Remove password from a PDF you own
Add text or image watermarks with tiling, page selection & layer control
Smart or full flatten — form fields, annotations, and layers made permanent
Remove metadata, annotations, JavaScript, and hidden content from PDFs
Detect and permanently redact personal information from PDFs
AI detects and permanently redacts PII — choose categories, add custom words
Compare two PDFs with 5 view modes — visual diff, text diff, overlay, flicker, and more
Send PDFs for electronic signature — add signers, place fields, track status
You can sign a PDF document online without printing, scanning, or installing software. The process takes under a minute:…
Password-protecting a PDF prevents unauthorised access by requiring a password to open the file. You can also restrict p…
PDFs support several security features — password protection, encryption, permissions restrictions, and digital signatur…
Legal work generates more PDFs than almost any other profession — contracts, filings, discovery documents, deeds, and co…
Unlocking a PDF removes its password protection, allowing you to edit, print, copy text, and annotate the document freel…
Flattening a PDF merges all interactive layers — form fields, annotations, comments, and digital signatures — into the s…
