PDF Encrypt / Decrypt
Add or remove a password
⚠️ This tool can only decrypt PDFs whose password you already know. It does NOT crack unknown passwords.
Quick guide
What can PDF Encrypt / Decrypt help you do?
Free PDF password protection / removal tool. AES-128 encryption. Decryption requires the known password. Browser-based, no upload.
Best for
Useful for quick file work, text cleanup, calculations, content creation, and website or AI checks.
How to use it
Open the tool, enter or upload what it asks for, then copy or download the result directly.
Privacy and limits
Most tools run in your browser with no sign-in. Very large files or older devices may hit browser memory limits.
Frequently Asked Questions
Can I recover a forgotten password?
No. This tool does not crack unknown passwords. Recovering an unknown PDF password is often illegal.
How strong is the encryption?
AES-128 (PDF 1.6 spec). Industrial-grade.
Is my file uploaded?
No. Everything runs via pdf-lib in your browser.