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In-memory processing
Unlock PDF runs as JavaScript inside this tab.
Never uploaded
Safe for financials, contracts and NDAs.
No caps or sign-ups
File size is limited only by device memory.
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Unlock a PDF to remove a password you already know, so you no longer have to type it every time, or to lift restrictions that block printing or copying text. Decryption runs in your browser.
Also known as Remove PDF password and Decrypt PDF.
If the PDF needs a password to open, you must enter it; the tool does not crack or guess passwords. PDFs that open freely but block printing or copying can usually be unlocked without one. Only unlock files you own or have permission to change.
Yes. Unlock PDF runs entirely inside your web browser using JavaScript, so the file never leaves your device. It is safe for confidential documents such as contracts, financial records and IDs.
There is no fixed limit, because the file is processed on your own device. Very large files depend on your device's available memory; a modern laptop or phone handles hundreds of megabytes.
Yes. ZapConvert runs in any modern browser, including Safari on iPhone and iPad and Chrome on Android, with nothing to install. You can add several files at once and download them together as a ZIP.