Protéger un PDF par mot de passe gratuitement — AES-256 sans payer

Questions Fréquentes

Can I password protect a PDF for free?

Yes — our PDF Encrypt tool is 100% free with no sign-up, no daily limits, no watermarks. Drop your PDF, set a password, click 'Encrypt'. The encrypted PDF downloads immediately. We use AES-256, the same encryption standard as paid tools like Adobe Pro.

Is this as secure as Adobe Pro?

Yes for the encryption itself. Adobe Pro uses the same AES-256 standard that we use. The difference: Adobe offers additional features (digital signatures, certificate-based encryption, redlining tools) that we don't. For password-based protection, our output is identical in security strength.

How is this free without ads or selling my data?

We use opt-in non-intrusive advertising on some pages, and premium sponsored positions. We never sell user data, never upload files (everything is browser-side), and never limit usage to force a paid tier. PDF protection is a basic document utility — it should be free for everyone.

Will my PDFs be uploaded?

No. Encryption runs entirely in your browser via pdf-lib + Web Crypto API. Your PDF and your password stay on your device. Only the encrypted output saves locally.

Can I protect many PDFs at once?

Yes — drop multiple PDFs and the tool processes them sequentially. You get a ZIP of encrypted PDFs (each with the same or different passwords, your choice). No limit on batch size other than your device memory.

What if I forget the password?

Recovery is impossible by design — AES-256 with a strong password cannot be brute-forced. If you forget the password, the encrypted PDF is effectively inaccessible. Always store passwords in a password manager (1Password, Bitwarden, LastPass) or in a secure written record.