ToolToUse

PDF & Document

PDF Unlock (Known Password)

Remove PDF encryption using a password you already know, without flattening the document.

Supported formats: PDF. You must know the password and have permission to modify the document. This does not crack passwords. Blank passwords can remove permissions-only encryption. PDF structure is rewritten, not rasterized; digital signatures may be invalidated. Corrupt files, unsupported encryption or engine errors produce no download. Processing is limited to 90 seconds and 25 MB; large files may exhaust browser memory.

PDF

PDF Unlock (Known Password)

Up to 25 MB
Options

Uses qpdf locally in a separate browser worker. Pressing Remove password loads about 1.34 MB of WebAssembly plus the engine code from this website; browser caching may avoid repeat downloads. Uncached resources require internet access. The PDF and password never leave your device.

Uses qpdf locally in a separate browser worker. Pressing Remove password loads about 1.34 MB of WebAssembly plus the engine code from this website; browser caching may avoid repeat downloads. Uncached resources require internet access. The PDF and password never leave your device. You must know the password and have permission to modify the document. This does not crack passwords. Blank passwords can remove permissions-only encryption. PDF structure is rewritten, not rasterized; digital signatures may be invalidated. Corrupt files, unsupported encryption or engine errors produce no download. Processing is limited to 90 seconds and 25 MB; large files may exhaust browser memory.

Good to know

Frequently asked questions

How do I use it?

Choose your file, adjust the options and press “Remove password”. When it finishes, download the result.

How does it work?

Uses qpdf locally in a separate browser worker. Pressing Remove password loads about 1.34 MB of WebAssembly plus the engine code from this website; browser caching may avoid repeat downloads. Uncached resources require internet access. The PDF and password never leave your device.

Are there limitations?

You must know the password and have permission to modify the document. This does not crack passwords. Blank passwords can remove permissions-only encryption. PDF structure is rewritten, not rasterized; digital signatures may be invalidated. Corrupt files, unsupported encryption or engine errors produce no download. Processing is limited to 90 seconds and 25 MB; large files may exhaust browser memory.

Are my files uploaded?

No. Files are processed on your device and never sent to our servers. No account is needed.

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