Six months ago you locked the renewal contract. Now your colleague is on holiday, the password is in a Slack DM you can't find, and you just want to read the thing. Or — more usually — you set a password to email a file, the recipient confirmed receipt, and now the lock is just baggage.
If you know the password, removing it takes seconds.
When you should remove a password
Remove a password when the file's job is done — you've sent it, the recipient has opened it, and from here it just sits on your drive. Carrying the password around forever is a recipe for losing access to your own document.
Don't remove the password before storing the file long-term in a system that isn't itself encrypted. The whole point was to protect it at rest.
Unlocking with Flint
Open Flint's unlock tool, drop in the file, type the password, and download the unlocked copy. The processing happens in your browser, so the password never leaves your machine.
This only works if you know the password. Flint won't (and can't) crack PDFs you don't own — that's a job for forensic software, not a normal web tool.
What about owner passwords?
Some PDFs have an owner password that restricts printing or copying but doesn't require a password to *open*. Flint can remove those too — same tool, drop the file in, and if no open password is needed, the restrictions strip off.
If you didn't set the restrictions yourself and don't have permission to remove them, don't. That's a copyright question, not a technical one.
FAQ
Can Flint remove a PDF password I don't know?
No. You need the original password. Flint is not a cracking tool.
Will removing the password change the PDF in any other way?
No. Page content, signatures, metadata and structure are preserved. Only the encryption layer is stripped.
Is it safe to upload my password to a web tool?
Flint processes the file in your browser — the password isn't sent to a server. For any tool that does upload, check their privacy policy first.
Can I unlock and then re-lock with a new password?
Yes. Unlock with the old password, then run the file through the password tool to apply a new one.
If the lock has done its job, retire it. Unlock your PDF and move on.