PDF Security
Protect, unlock, sign and watermark PDF files privately.
About PDF Security
Protect, unlock, sign and watermark PDF files privately.
Tools
Fill PDF Form
Add text, checkmarks, dates and signatures to a PDF form in your browser.
Sign PDF Online Free
Type or draw a visible signature, place it on your PDF, and download privately.
Watermark PDF
Stamp every page with your text, in your browser.
Add Page Numbers
Number every page with full control over position and format.
Unlock PDF
Strip basic owner restrictions from a PDF you have permission to edit.
Flatten PDF
Bake a PDF into a static, non-editable copy.
PDF Metadata Cleaner
Strip every metadata field before sharing.
FAQ
Which PDF Security tool should I use first?
Start with the tool that matches your immediate task, then use the related tools on each page if you need a follow-up step.
Can I use these tools on mobile?
Yes. The pages and workspaces are responsive, though very large files may be easier to process on a desktop browser.