Encrypt PDF — free, private, no upload

Add a password to a PDF with strong AES-256 encryption and control printing, copying and editing permissions. 100% local.

No upload. No watermark. No sign-up. This encrypt pdf tool runs entirely inside your browser — your file never leaves your device.

How to encrypt pdf

1. Open your PDF in the tool above — it loads locally in your browser.
2. Pick your options; processing happens on your device with JavaScript.
3. Download the result — free, with no watermark added.

More security & privacy tools

• Remove Password — Unlock a PDF you can open, and save a decrypted copy.
• Unlock PDF — Lift printing, copying and editing restrictions.
• Strip Metadata — Scrub author, producer and hidden document info.
• Privacy Risk Scanner — What is this PDF leaking? Metadata, PII — full report.
• Redaction Checker — Is the blacked-out text really gone, or still recoverable?
• Fingerprint File — SHA-256, SHA-1 and MD5 digests to prove file integrity.

← All free local PDF tools