The two kinds of PDF password
Not every password-protected PDF behaves the same way, and knowing which kind you have decides what you can do next.
- Open password (user password). You cannot view the file at all without it. Your reader asks for the password the moment you try to open the document, and the contents stay encrypted until the right password is entered.
- Permissions password (owner password). You can open and read the file, but editing, printing, or copying text is blocked until the restriction is removed by someone with the password.
In both cases the protection is real encryption or a real restriction set by the person or application that created the file — not a flag that any tool can simply switch off.
Why PaperKit cannot open a locked file
No PaperKit tool unlocks, bypasses, or removes a password, and that is deliberate. A browser-based tool that could strip passwords on request would be a tool for opening other people's protected documents. If a PDF will not open in a PaperKit tool, the password restriction is still in place, and the file must be unlocked properly first — there is no PaperKit workaround, and any service claiming otherwise should be treated with suspicion.
Unlock it in the application that created it
The legitimate route is to remove the protection where it was set. Open the file in the application that created it — or in a full PDF application you trust — enter the password, and save or export an unlocked copy. Keep the original locked file untouched, so you always have the protected version to fall back on, and work only on the unlocked copy.
If the file is your own but you cannot remember the password, check whether you saved it alongside the document, in a password manager, or in the notes from when the file was created. Re-creating the document from its source file is often faster than hunting for a forgotten password.
Ask the sender for an unlocked copy
If someone else sent you the file, the simplest honest step is to ask them. Senders often protect a file out of habit and are happy to send an unlocked copy, or to share the password with you directly. Explain what you need the file for — for example, that you need to split out certain pages or merge it with other documents — so they can send a version that fits the job.
After unlocking: split and merge
Once you have an unlocked copy, PaperKit tools work on it like any other PDF. Use the Split PDF tool to extract just the pages you need — it splits by page ranges you choose — or the Merge PDF tool to join the unlocked file with other documents. Both run in your browser, so the unlocked file never needs to be uploaded anywhere.
Beware password-cracking tools
Tools that promise to crack, break, or remove PDF passwords should be avoided. Many are scams, some install unwanted software, and all of them require you to hand your protected file to a stranger — the exact opposite of keeping it private. If a file is not yours and you do not have the password, you do not have a legitimate route to open it. If it is yours, the creating application or the sender is the safe path.
For the wider picture on document privacy, see the PDF privacy guide, which explains browser-based processing and safe sharing habits.
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Open Split PDF →Free, no account needed, and your files are processed in your browser — never uploaded.
Open Merge PDF →