Protect PDF
Lock your PDF with a password so only people who know it can open it.
or drop a PDF here
Uses the standard PDF password feature (RC4 40-bit), which keeps casual readers out. For highly sensitive files use dedicated encryption software. Pages are converted to images, so text can no longer be selected. Remember your password: it cannot be recovered.
Your files are processed in your browser and are never uploaded to any server.
Free Online PDF Protector – Add a Password to Your PDF
Contracts, financial statements and personal records should not be open to everyone. Our Free Online PDF Protector adds a password to your PDF so that only people who know it can open the file.
The whole process runs in your browser. Your document and your password are never sent to a server.
Key benefits
- Password to open: the PDF asks for your password before it shows anything.
- Printing control: choose whether printing is allowed.
- Private: no upload, no account, no tracking of your files.
- Free: no watermark and no limits.
How to use it in 3 easy steps
- Select your PDF: click the button or drag the file in.
- Set a password: type it twice and choose your options.
- Protect and download: click "Protect PDF" and save your locked file.
Frequently asked questions (FAQ)
How strong is the protection?
The tool uses the standard PDF password feature (RC4 40-bit). It keeps casual readers out, but for highly sensitive documents we recommend dedicated encryption software.
Can I recover a forgotten password?
No. There is no way to recover it, so keep it somewhere safe.
Why can’t I select text in the protected file?
To apply the password, pages are converted to images. The result looks the same but the text is not selectable.
Is my password sent anywhere?
No. Everything happens locally in your browser.
Conclusion
Add a password to sensitive files in seconds with the Free Online PDF Protector.