Protect PDF
Lock a PDF with a password using real AES-256 encryption. Free, no sign-up, and neither your file nor your password leaves your browser.
How to use Protect PDF
- Upload your PDF.
- Enter a password of at least 4 characters and type it again to confirm.
- Download the protected PDF. It asks for the password every time it is opened.
Common uses
- Sending ID copies, bank statements or transcripts by email
- Sharing contracts and personal documents safely
- Keeping sensitive files private on a shared computer
Frequently asked questions
How strong is the protection?
The file is encrypted with AES-256 using your browser’s built-in cryptography. Nobody can open it without the password.
What if I forget the password?
The file cannot be recovered by anyone, including SeekFora. Keep the password somewhere safe.
Is my PDF or password sent anywhere?
No. Encryption happens in your browser; neither the file nor the password leaves your device.
Related tools
- Redact PDF — Permanently remove sensitive content
- Watermark — Add a text watermark across every page
- Digital Signature — Sign documents digitally with ease
- Compress PDF — Reduce file size, keep it readable