PDF Locker & Unlocker
Add a strong password or remove an existing one. Processed 100% locally in your browser so files never leave your device.
Drag & Drop PDF file here
or click to browse local files
How to Secure or Unlock PDFs Client-Side
1Choose Mode & File: Select whether to lock or unlock at the top of the box. Drop your PDF into the secure area.
2Enter a password: Type the desired new password (to lock) or the current password (to unlock).
3Process & Download: Click the button. The browser-side script will securely rewrite the file. Click download to save.
Frequently Asked Questions
Q: Will my locked PDF open in standard readers?
A: Yes! It embeds standard security metadata so Adobe Acrobat, Chrome, Firefox, Edge, Safari, and other
viewers will natively request the password before unlocking contents.
Q: Can I unlock a PDF without the original password?
A: No. You must know the current password to permanently remove it from the document.
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