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Lock PDF
Add password protection to your PDF
Browser Limitation
Full PDF encryption requires server-side processing. This tool optimizes your PDF for protection, but true password encryption is not yet available in pure browser mode. We're actively working on adding this feature.
Drag & drop a PDF file here
or click to browse
Private PDF workflow
What this Lock PDF tool is best for
Prepare a PDF for safer sharing when you want a basic protection workflow.
Common use cases
- Internal sharing
- Draft documents
- Client review packets
- Files that need extra handling care
Formats and privacy
Input: PDF. Output: protected or prepared PDF workflow.
The protection workflow runs locally where possible.
Things to check before sharing
- Browser-based protection is not a replacement for enterprise document security.
- Recipients with access may still share files.
- Use secure channels for sensitive documents.