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About this tool
Remove the open password from a PDF you own and download an unlocked copy, entirely in your browser.
Unlock PDF removes the encryption from a password-protected PDF you can already open, producing a copy with no password on it. It decrypts the document using the standard security handler defined in ISO 32000 — RC4 40-bit and 128-bit for older files, AES-256 for PDF 2.0 files — and accepts either the user password or the owner password, exactly as the specification requires. Everything runs in your browser, so the file and the password are never uploaded.
Open Unlock PDF on AltFTool — it loads instantly in your browser.
Upload or drag in the file you want to work with.
Adjust the settings and preview the result.
Download the finished file to your device.
The PDF and the password stay in the browser tab; nothing is uploaded to a server.
Works with the user password or the owner password, and reports which algorithm was in use.
Only the encryption layer is removed — pages, text, fonts and images are untouched.
No. Without the correct password the file encryption key cannot be derived at all, so there is nothing to decrypt. This tool removes protection from files you can already open; it does not guess, crack or recover passwords.
RC4 40-bit and 128-bit (encryption versions 1 and 2, revisions 2 and 3) and AES-256 (version 5, revision 6, the PDF 2.0 standard). Files using a custom or third-party security handler cannot be unlocked here.
The user password is needed to open the document; the owner password controls permissions such as printing and copying. The standard security handler accepts either one to decrypt, so entering whichever you have is enough.
No. The PDF is read into the browser tab with the File API and decrypted there using the Web Crypto API, so neither the document nor the password is sent over the network. Closing the tab discards both.