Encrypt / Decrypt PDF
Set an open-password on a PDF, or remove the password from a PDF you own (password required). Everything runs locally in your browser; neither your file nor your password is uploaded.
Drop your file here
or choose from your device — no sign-up needed
Files are processed locally in your browser — never uploaded to any server
Full-release pricing preview: $6.9/mo or $49/yr · 30-day email notice before billing starts · nothing is charged during the beta
How it works (3 steps)
Choose encrypt or decrypt
Encrypt sets an open-password; decrypt removes a password you already know.
Enter the password
Validated before any quota is consumed. Wrong passwords are reported and refunded.
Download the result
An encrypted copy, or an unlocked copy of your own document.
Popular searches
- remove password from PDF online (known password)
- password protect PDF free
- unlock PDF with password
FAQ
No — and we are honest about that. Decryption only works when you provide the correct password. We do not offer password recovery or cracking.
Try it ↑No. Encryption and decryption run locally in your browser; the file and password never leave your device.
Try it ↑AES-based PDF open-password protection compatible with mainstream readers (Adobe, Chrome, Edge).
Try it ↑No. Any change to a signed PDF (merging, compressing, watermarking…) invalidates the existing digital signature — that is the tamper-proof design of PDF signatures, not a limit of this site. Process first, then sign.
Try it ↑Yes — and you can verify it: the tool runs on open-source in-browser engines (pdf-lib, pdf.js, Tesseract OCR…) on your own device. Open DevTools → Network while processing and you will see no file upload requests.
Try it ↑Related tools
Add Watermark to PDF
Stamp every page with text like “CONFIDENTIAL” or “INTERNAL USE ONLY” — tiled across the page or centered, with light / standard / dark opacity
Merge PDF
Combine several PDFs into one file, in exactly the order you want — drag to reorder before merging
Split PDF
Four split modes: extract page ranges (like 1-3,5,7-9), split every N pages, split by bookmarks (outline chapters), or split by target file size