Protect PDF with a Password
Add password protection to a PDF — instantly in your browser.
No upload No signup Works in browser Free
Drop your file here
or click to browse — nothing is uploaded
How to use
- 1Drop a PDF or click to browse your files.
- 2Enter and confirm a password.
- 3Click "Add password" and download the protected file.
Protect PDF with a Password — why it works this way
Password-protecting a PDF usually means uploading it to a server, which defeats the point if the document is sensitive. This tool encrypts the file with AES-256 entirely in your browser — it never leaves your device.
Is my file uploaded? No. Everything happens locally in your browser using the Canvas/File APIs — your file is never sent anywhere.
FAQs
Is my PDF uploaded anywhere?+
No. Encryption happens entirely in your browser.
How strong is the protection?+
It uses AES-256 encryption via a small, independently-published library — good enough to keep a casual reader out, but not a substitute for audited, industry-standard document-security software for highly sensitive files.
What if I forget the password?+
There's no recovery — keep the password somewhere safe, since it can't be reset.