PDF Verschlüsseln / Entschlüsseln

Schützen Sie ein PDF mit einem Passwort oder entfernen Sie den Schutz

Ziehen Sie ein PDF hierher oder klicken Sie zum Auswählen

Maximale Dateigröße: 128 MB

Die Verarbeitung erfolgt lokal in Ihrem Browser. Ihre Dateien verlassen niemals Ihren Computer.

PDF kostenlos mit Passwort schützen — AES-256 ohne Bezahlung

Add professional-grade password protection to any PDF — entirely free. AES-256 encryption, browser-side processing, no daily limits, no watermarks, no sign-up. Whether you secure one document or one hundred, our tool is ready. Replaces paid alternatives like Adobe Pro for this specific task.

100% FreeNo UploadNo Sign-up100% Free, No Limits

Ähnliche Suchanfragen

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Anleitung

  1. Drop PDF: Drag any PDF in. Multi-page documents supported. The tool shows file size and confirms the PDF is ready for encryption.
  2. Set Strong Password: Enter a password. We recommend 12+ characters with mixed case, numbers, and symbols. Password length matters more than complexity — passphrases like 'correct-horse-battery-staple' are excellent.
  3. Optional Restrictions: Decide whether to restrict printing, copying, or editing. For maximum compatibility, leave restrictions off and rely on the open password alone.
  4. Encrypt: Click 'Encrypt'. Your PDF is encrypted in your browser with AES-256. The output downloads as a new file. Process 1, 5, or 100 documents — no usage limits.

Warum Dieses Tool Wählen

  • 100% Local Processing: Files are processed entirely in your browser using JavaScript — never uploaded to any server.
  • No Limits: No file count or file size restrictions. Process as many files as your device can handle.
  • No Sign-up: Free forever, no account needed, no email required. Open the page and start.
  • Private by Design: Nothing is sent to any server. Close the tab and your files are gone forever.

Häufige Fragen

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.

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NordPass

Nachdem Sie Ihr PDF mit einem Passwort geschützt haben, speichern Sie es in NordPass, damit Sie es nie selbst merken müssen.

Starke Passwörter nutzen nichts, wenn sie in einer Notes-App liegen — ein Passwortmanager verschlüsselt sie und hält sie für Autofill bereit.

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