Password-protect a PDF with strong encryption so only people with the password can open it — done entirely in your browser.
Add your file
Drop your file into the box above or click to browse. It's processed privately in your browser — nothing is uploaded.
Choose your options
Adjust the available settings to get exactly the result you need.
Download the result
Run the tool and download your file instantly — no sign-up, no watermark.
Protect PDF encrypts your document with a password so it can only be opened by someone who knows it — ideal for contracts, statements, IDs and anything confidential you need to email or upload.
Everything runs in your browser: your file never leaves your device and the password is never transmitted. The result is a standard encrypted PDF that any reader will prompt for the password to open.
Yes. The PDF is encrypted with a standard password security handler, so it genuinely can't be opened without the password — it's not just a flag.
No. The encryption happens locally in your browser and neither your PDF nor your password is ever sent to a server.
There's no recovery — that's the point of encryption. Store the password somewhere safe before sharing the file.
Drop files here or browse
application/pdf · up to 20 MB · max 5 files
Anonymous limit: 5 files · sign up free for more