PDF Tools
Password Protect / Unlock — Free Online
Free online password protect / unlock tool. Add or remove PDF passwords. Part of our pdf tools — no signup, no uploads, runs in your browser.
Uses PDF.js and PDFKit (MIT) in your browser. Pages may be rasterized during password changes.
About Password Protect / Unlock
Free online password protect / unlock tool. Add or remove PDF passwords. Part of our pdf tools — no signup, no uploads, runs in your browser.
Why choose Online Tool Hub?
- Free forever — supported by non-intrusive ads
- Privacy-first — client-side processing when possible
- Works on any device with a modern browser
- Part of a growing suite of 35 free pdf tools
Frequently asked questions
- How do I use the Password Protect / Unlock tool?
- Select a PDF from your device, adjust any options shown, then click the action button. The result downloads immediately. If the PDF is password-protected, use the Unlock PDF tool first.
- What PDF formats are supported?
- Standard PDF files from Acrobat, browsers, Office exports, and scanners are supported. Very large files may be slower on older devices because processing happens locally in your browser.
- Can this tool both lock and unlock PDFs?
- Yes. Use the same tool to add a password or remove one when you know the current password.
- Are my files uploaded to your servers?
- No. This tool runs in your browser whenever possible. Your files and text stay on your device and are not sent to our servers for processing.
- Do I need an account or subscription?
- No account is required. Online Tool Hub document tools are free to use with no signup and no usage limits.