A PDF that asks for its password every time is a nuisance once you have typed it a hundred times: the bank statement you download each month, the payslip, the report a client sends locked by policy. This tool takes that PDF and the password you already use for it, and saves a copy that opens without asking.
The password is required. The tool does not guess, recover or bypass one. It runs qpdf, compiled to WebAssembly, inside your browser: the file and the password stay on your device, and nothing is uploaded.
What you need before you start
You need the file and one of its passwords. A PDF can carry two: the open password that a reader asks for, and an owner password that lifts printing and copying restrictions. Either one works here, because either one lets qpdf read the document and write it back out without encryption.
If you do not have a password, this tool cannot help, and neither can anything else that runs in a browser. AES-256 encryption is designed so that the only way in is the key. The copy on this page says the password is required because that is the truth of it, not a formality.
How the file is read
Most PDF tools on this site open a file with a page renderer first, to show thumbnails. A renderer refuses an encrypted file without its password, so this tool skips that step. It reads the raw bytes, looks for the encryption entry every protected PDF carries in its trailer, and tells you whether the file is protected before you type anything.
The password is passed to qpdf along with the bytes. On a match, qpdf writes a new PDF with the encryption removed and the content otherwise unchanged. On a mismatch, it stops and reports an invalid password, and no file is produced.
What changes in the file, and what does not
Only the encryption is removed. Pages, text, fonts, images, bookmarks and form fields come through as they were, because qpdf rewrites the document structure and leaves the content streams alone. Text that was selectable stays selectable; a scanned page stays at the resolution it arrived in.
Restrictions go with the encryption. A file that opened freely but refused to print was protected with an owner password only, and removing the encryption removes that restriction too. That is why the owner password is what this tool needs for such a file: the open password on a file like that is empty, and an empty password is not accepted here.
The first run loads an engine
qpdf is around 1.3 MB of WebAssembly, fetched from this site the first time you click the button in a session. The button says so while it loads. Later runs in the same tab start at once.
Once the engine is in memory, unlocking takes well under a second for a typical document. Large scanned files take longer only because there are more bytes to copy through; the encryption work itself is small.
Frequently asked questions
Can this open a PDF when I have forgotten the password?
No. The password is required, and the tool does not attempt to guess or recover one. If you have lost it, ask whoever sent the file for another copy or for the password itself.
Is my PDF or my password uploaded anywhere?
No. qpdf runs inside your browser as WebAssembly served from this site. The file is read from your disk into memory, the password is used there, and the unlocked copy is written back to your downloads. No request carries either one.
Which password should I enter, the open one or the owner one?
Either. The open password is the one a reader asks for; the owner password is the one that lifts printing and copying restrictions. qpdf accepts both, so type whichever you have.
The file opens without asking me for a password but will not let me print. Can this fix it?
Only with the owner password. A file like that was locked with an owner password alone, and its open password is empty. This tool asks for a password before it will run, so you need the owner password to remove the restriction.
I typed the password and the tool said it was invalid, but it works in my PDF reader.
Check for a trailing space, a different keyboard layout, or Caps Lock, since the field hides what you type. Some readers remember a password and open the file silently, which can make a half-remembered one look right when it is not.
Does the unlocked file lose quality or formatting?
No. The page content is not re-rendered. qpdf copies the objects that make up the document and writes them out without the encryption layer, so text, fonts, images and form fields are the same as before.
Why does the tool say my file has no password?
It scanned the file and found no encryption entry, which means the PDF is not protected and there is nothing to remove. If it still asks for a password in your reader, you may be opening a different file than the one you loaded here.
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