Protect / Unlock PDF
Add or remove password protection on PDFs.
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About the Protect / Unlock PDF
Add or remove password protection on PDFs. The Protect / Unlock PDF is a fast, free online tool from 100Tools that helps you get the job done in seconds — no downloads, no sign-up walls and no clutter.
Whether you're a beginner or a professional, this pdf tools tool gives you a clean, modern interface and instant results. It runs on our servers with a generous free daily allowance, and 100Tools Pro removes the limits entirely.
Features
- Fast & free — get results instantly with no cost to start.
- Privacy-first — your input is processed securely and never stored.
- Works everywhere — desktop, tablet and mobile, no install needed.
- Clean interface — a modern, distraction-free design.
Common use cases
- Preparing files for upload where there's a size or format limit.
- Cleaning up documents or images before sharing them with others.
- Batch-style one-off conversions without installing desktop software.
How to use the Protect / Unlock PDF
- 1
Add your input
Upload your file or enter your details into the Protect / Unlock PDF above.
- 2
Configure options
Adjust the available options to match exactly what you need.
- 3
Get your result
The Protect / Unlock PDF processes your input instantly and shows the result.
- 4
Copy or download
Copy the output to your clipboard or download it — no sign-up required.