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Protect / Unlock PDF
SecurityEncrypt a PDF with a password, or remove a known password from a protected PDF. All processing stays in your browser.
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Drop files here or click to browse
🔒 100% Private
Files never leave your browser. No upload to any server.
⚡ Instant
Processing runs locally on your device. No queues, no waiting.
🆓 Free & Open Source
No signup, no watermarks, no limits. MIT-licensed code.
Frequently asked questions
How strong is the encryption?
PDFs are encrypted with AES-256 (industry standard).
Can I unlock a PDF I forgot the password to?
No. You must know the password — this tool does not crack passwords.
Are my files uploaded?
No. Encryption and decryption run entirely in your browser.