Protect PDF
Create a PDF with a password required to open it and optional copying, printing or modification permissions. An opening password protects access differently from a visible watermark. Choose a strong password and share it separately from the document.
100 MB per file · up to 500 pages per job · one job at a time. Files are temporary, expire within 24 hours and are cleaned up automatically. Download results promptly; service restarts can remove them earlier.
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What Protect PDF does
Create a PDF with a password required to open it and optional copying, printing or modification permissions. An opening password protects access differently from a visible watermark. Choose a strong password and share it separately from the document.
How to use this tool
- Upload one PDF and supply any existing password if required.
- Set an opening password, owner password and permission options.
- Process, download and test the password in a PDF reader.
Common uses
- Limit access to a document you share.
- Set viewing-permission preferences for a PDF.
Formats and limits
- Input
- Output
- Current file limit
- 100 MB per file, up to 500 pages per job, one job at a time. Shared usage quotas apply.
Reader permission enforcement varies and is not absolute copy prevention. Losing the password can prevent access; keep your original safely.
Questions about Protect PDF
Will printing and copying restrictions stop every reader?
No. PDF permission settings depend on reader enforcement. Do not treat them as complete prevention of copying or screenshots.
Does a password make processing end-to-end encrypted?
No. The hosted worker needs access to the document while processing it. HTTPS protects transport; this is not an end-to-end encrypted processing service.
Your files and privacy
Documents are uploaded over HTTPS to the hosted service. Files are temporary and protected by your browser session. Download results promptly and keep a local copy before temporary files expire.
Read document handling details · Review security and processing limits
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