🛡 Local — le fichier n'est jamais envoyé
Password-protect a PDF
Encrypt your PDF with AES-256 using qpdf compiled to WebAssembly — the password and file never leave your browser.
This tool runs entirely in your browser. Your file is never uploaded.
FAQ
How strong is the encryption?
AES-256 (PDF 2.0 standard encryption) via qpdf, the same library used by professional PDF pipelines.
Do you ever see my password?
No. Encryption runs in WebAssembly inside your browser; neither the file nor the password is transmitted.
Are my files uploaded to a server?
No. All local tools process your file inside your browser using WebAssembly. You can verify this in the Network tab of your browser's developer tools.
Do I need a subscription?
No. Local tools are free without limits. AI features use one-time credit packs whose balance never expires.