PDF Locker
Add password protection, control permissions, and download secured PDFs instantly. Everything happens locally—your documents never leave your device.
PDF Locked Successfully!
Your password-protected PDF has been downloaded. Store the password safely.
Why Password Protect PDFs?
PDF encryption prevents unauthorized access to contracts, medical records, financial statements, course material, and proprietary files. Combine strong passwords with permission controls so only the right people can open, print, copy, or edit your work.
🔐 AES Encryption
Uses strong password-based protection right in your browser.
🧾 Permission Controls
Allow or block printing, copying, and editing before exporting.
⚡ Instant Download
Process files in seconds with no uploads or waiting.
🆓 Unlimited
No size limits, accounts, or hidden fees—lock as many PDFs as you need.
Security Best Practices
- Use a unique, complex password per document and store it in a password manager.
- Share the password over a different channel than the PDF itself.
- Disable printing/copying for sensitive client deliverables or coursework.
- Keep an unlocked master copy stored securely in case you need edits later.
Frequently Asked Questions
No. Everything runs in your browser. We never see, store, or transmit your files.
Password recovery isn’t possible. Make sure you save it in a secure place.
Use our PDF Unlocker tool with the correct password to remove protection later.
Yes. The locker works on any modern browser, including phones and tablets.