Protect PDF
Add a password to encrypt and protect a PDF file.
Drag & drop your files here
or pick from your device
Supported formats: PDF
How to use
- 1
Upload your PDF file.
- 2
Type the password you want to protect the file with.
- 3
Click "Convert" and download the protected file.
About the Protect PDF tool
Payslips, medical reports, contracts, ID scans — some files should only ever be opened by their owner. This tool encrypts a PDF with a password using the AES-256 standard, the same encryption level used in banking systems, making it practically impossible to open the file without the correct password.
The irony of popular protection services is that you upload your unencrypted file to their servers in order to "secure" it — here, encryption happens entirely in your browser, so neither the file nor the password ever passes through any intermediary. Store the password somewhere safe: without it, nobody can open the file, including us.
When do you need this tool?
Emailing sensitive documents
Encrypt a bank statement or medical report before sending it, and share the password through a separate channel like a call or text.
Protecting files on shared devices
Keep personal documents stored on a work machine or family computer safe from accidental or intentional opening.
Restricting access to business documents
Send price lists or internal plans encrypted so only partners you've given the password can open them.
Why ToolsRio?
Real privacy
All processing happens inside your browser. Your files are never uploaded to any server, and nobody can see them — not even us.
Free without limits
No watermark, no file-count limits, and no hidden paid tiers.
Instant speed
No waiting for uploads and downloads to a remote server — processing starts immediately on your device.
No sign-up
No account, no email, no annoying ads. Open the tool and use it right away.
Frequently asked questions
What kind of encryption is used?+
AES-256 encryption is used — the same standard found in professional PDF protection tools.
What if I forget the password after protecting the file?+
You won't be able to open the file again without it; keep the password somewhere safe before downloading.