Merge PDF
Combine multiple PDF files into one document. Reorder pages before merging.
OpenPassword-protect a PDF and optionally restrict printing, copying and editing. - runs entirely in your browser. Free, fast and private.
Add the document you want to password-lock.
Choose the password required to open the file.
Optionally block printing, copying, or editing.
Download the encrypted PDF ready to share securely.
Protect PDF is a free pdf utility on OneDevToolkit. Password-protect a PDF and optionally restrict printing, copying and editing. It runs in your browser for this session - use the workspace on this page to try it.
Need a related step? Open the PDF Tools hub at /pdf-tools/ or the <a href="/blog/">blog</a> for longer workflows.
Processes data instantly with no server round-trips.
Your data never leaves your browser. Nothing is uploaded.
Works in any modern browser. Nothing to download or install.
No limits, no sign-up, no credit card required.
Works on desktop, tablet and mobile devices.
Beautiful in both themes. Your preference is saved.
Keyboard shortcut
Run Protect PDF on local files when you cannot upload client or work documents.
Process deliverables on-device and keep an audit trail with privacy receipts where supported.
Handle common pdf tools tasks without installing desktop software.
Answers for this tool. For site-wide help, open the FAQ hub.
No. Protect PDF is built to process PDFs in your browser with client-side libraries. Your document stays on your device during processing.
Protect PDF works with common PDF 1.3–1.7 files produced by Word, browsers, and design apps. Extremely unusual or damaged PDFs may fail validation.
Encrypted PDFs often need unlocking first. If the tool rejects the file, remove the password in a trusted desktop app, then retry Protect PDF.
It depends on the operation. Merge/split/rotate usually preserve page content; compression or rasterisation can affect visual fidelity. Preview results before discarding the original.
There is no fixed server quota, but very large page counts are limited by your device memory. Try a shorter range first if the browser becomes slow.
Keep your original PDF. Browser processing does not replace the source file until you download and overwrite it yourself.
After the page and libraries load, many PDF actions continue offline. First-time library loads need a network connection.
The web tool is free to use for typical personal and commercial workflows. Review Terms for full usage conditions.
Start from a clean source PDF, avoid repeated re-compression, and pick quality presets that match your goal (screen vs print).
See related tools in PDF Tools and our privacy-first PDF guide.