Free Unlock PDF
Remove the password from a PDF you can open, or lift printing and copying restrictions you have the right to remove. It never cracks passwords.
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How to remove a password or restrictions from a PDF you own
PDFs can have an open (user) password and owner restrictions on printing, copying or editing. This tool shows exactly which apply, then writes a decrypted copy. It cannot guess or recover a password you do not know.
- Choose the PDF (up to 100 MB). The tool checks the encryption type and lists current permissions.
- If the PDF needs a password to open, type it. The owner password also works.
- Tick the box confirming you own the document or have permission to unlock it.
- Select Unlock and download. QPDF decrypts the file, checks the copy's structure and confirms it is no longer encrypted.
- Keep the unlocked copy safe, because anyone who has it can now open it.
When you might need to unlock a PDF
Banks, payroll services and insurers often send statements protected with a password such as part of your date of birth or customer number. Typing that password every time you open the file, or failing to upload it to a portal that rejects encrypted files, is a nuisance. An unlocked copy solves both.
Other PDFs open freely but carry owner restrictions that block printing, copying text or filling in forms. If you created the document and lost the owner password, or the publisher has given you permission, removing those restrictions makes the file usable again.
Only unlock files you own or are entitled to change. The tool asks you to confirm this, and it cannot open files whose password you do not know.
Worked example: reading the permissions
PDF permissions are stored as a 32-bit number called P. A file protected with printing and copying blocked shows P = −2072. Decoding the bits gives: print not allowed (bit 3), copy text and images not allowed (bit 5), high-resolution print not allowed (bit 12), while editing, comments, form filling, accessibility extraction and page assembly remain allowed. The tool lists these in plain language, for example 'Print (high resolution): not allowed'.
A file with P = −4 has every permission bit set, so nothing is restricted even though it is encrypted. Modern files use AES-256 (security revision 6); older ones may use RC4 or AES-128, and the tool reports which.
In our tests, a two-page PDF protected with an open password and AES-256 was rejected with a wrong password and unlocked with the correct one. The owner password worked as well. A file with only owner restrictions was unlocked without any password once permission was confirmed. In each case QPDF then confirmed that the copy was no longer encrypted.
How unlocking works
The tool uses QPDF 12, a widely used open-source PDF library, compiled to WebAssembly and run in a separate browser worker that is discarded after each job. First it runs QPDF's encryption report to find out whether the file is encrypted, whether a password is required and which permissions are set.
To unlock, QPDF opens the file with the password you entered (or none for owner-only restrictions) and writes a new file without encryption. It then checks the new file's structure and confirms that the copy is no longer encrypted before offering the download. If any check fails, nothing is saved.
The PDF Toolkit also has an unlock option that uses the same engine. This page adds the encryption report and permission list, and handles owner-only restrictions without asking for a password.
Common mistakes and limits
Expecting password recovery. Strong PDF encryption cannot practically be reversed without the password, and this tool does not try. Ask the sender, or check the email that delivered the file, since many organisations explain the password format there.
Typing the password with the wrong case or with extra spaces copied from an email. Passwords are case-sensitive; use the Show button to check what you typed.
Unlocking a digitally signed PDF and expecting the signature to stay valid. Decryption rewrites the file, so signature checks will fail. Keep the original as your proof of signature.
Useful tips and limitations
- If a file only has owner restrictions, it opens without a password and can be unlocked straight away, once you confirm you are allowed to.
- Removing encryption rewrites the file, so existing digital signatures in it will show as invalid. Keep the original.
- After unlocking, you can sign or fill the copy with Sign & Fill PDF, or compress it before uploading it to a portal.
- Delete unlocked copies of sensitive statements when you no longer need them, since they open without a password.
Common questions
Can this unlock a PDF if I forgot the password?
No. There is no guessing, brute force or password recovery. Ask the sender for the password or use an unprotected original.
How is this different from the unlock option in the PDF Toolkit?
Both use QPDF. This page first reports how the file is protected and which permissions are blocked, and it can lift owner-only restrictions from PDFs that open without a password.
Are my file and password sent anywhere?
No. QPDF runs as WebAssembly in an isolated worker in your browser. The password is used once and not stored or logged.
What is the difference between a user and an owner password?
The user (open) password is needed to view the file. The owner password controls permissions such as printing and copying. Either can be entered here when the file needs a password to open.
Does unlocking reduce quality?
No. Pages, images and fonts are copied as they are; only the encryption is removed.
Why does it say the PDF is not encrypted?
The file has no password and no restrictions, so there is nothing to remove. If an app still refuses it, the file may be damaged rather than protected.
The PDF and password are processed in an isolated browser worker and are not uploaded to ToolWorld Online. The password is not saved. Save the unlocked copy before closing the tab.