DocomintUnlock a Password-Protected PDF
Remove a password from a PDF you already know the password to, entirely in your browser.
Drop your PDF here
or choose a file from your device
What is a Unlock a Password-Protected PDF?
This removes a password from a PDF you're already able to open — typically a document you protected yourself and no longer need locked, or a file whose sender gave you the password directly and you'd rather not re-enter it every time.
How to use the Unlock a Password-Protected PDF
- Add a password-protected PDF you know the password to
- Enter that password
- Download the unlocked PDF
Example
Given a PDF that opens after typing "Q7#mx2Lp", entering that same password here removes the requirement entirely, so the next person who opens the file doesn't need it.
Why use Unlock a Password-Protected PDF
Covers the common encryption schemes
Handles RC4 40/128-bit and AES-128 — what the large majority of password-protected PDFs actually use.
Nothing uploaded
Decryption happens locally in this browser; your file and the password you type never leave your device.
Not a cracking tool
Only authenticates a password you already supply — it doesn't attempt to guess or brute-force an unknown one.
What can you create?
Stop re-entering a password you no longer need
Remove protection from a PDF you set a password on yourself but don't need locked anymore.
Prepare a file for merging or editing
Unlock a protected PDF first, since most other tools here can't open an encrypted file directly.
Simplify a file before sharing internally
Drop a password requirement on a document once it's moved from an external channel to internal, already-trusted storage.
Frequently asked questions
Is my PDF uploaded anywhere?
No — Unlock a Password-Protected PDF runs entirely in your browser using JavaScript/WebAssembly. Your PDF is never sent to a server.
Is there a file size limit?
Free use covers files up to 100MB per file; signing up for Pro raises that to 500MB.
Can this tool crack a password I don't know?
No. This only removes a password you already know — it isn't a password-cracking tool and won't attempt to guess or brute-force anything.
Does this work on any password-protected PDF, or only certain encryption types?
It handles the common types — RC4 40/128-bit and AES-128 — which cover most password-protected PDFs. Newer AES-256 (revision 5/6) files are explicitly rejected with a clear error rather than silently mishandled.