1Upload the PDF documents whose restrictions you want cleared.
2Supply the password if the file needs one to open at all — that kind is real encryption and is not bypassed here.
3Run it; the printing, copying and editing permission flags are removed from the document.
4Download the unlocked PDF file.
Unlock PDF FAQ
Is it legal to remove these restrictions?
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On a document you own or are authorised to use, removing permission flags so you can print or copy your own material is ordinary. On someone else's copyrighted material it is not. That judgement is yours to make, not ours.
What does Unlock PDF actually remove?
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Concretely, an owner password only sets permission flags — printing, copying, editing — and removing those flags is what this does. A user password, the kind that stops the file opening at all, is real encryption and is not bypassed here; you need the password. It removes restrictions on a document you can already open; it does not recover a document you cannot.
Anything specific to PDF here?
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Yes — a PDF is an object graph, not a page image, so text stays selectable and vectors stay sharp no matter what happens to the raster content inside it. Relevant to what survives once the flags are gone.
Can you remove a password I do not know?
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No, and we do not try. If the file needs a password to open, that is encryption and we will not attempt to break it. Supply the password and the restrictions can be lifted; without it there is nothing to do.
What can I upload to Unlock PDF?
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Any standard PDF, including ones produced by a scanner, by a word processor or by a print driver. Files with an owner password that only restricts editing are handled; files that need a user password to open are not, and we do not attempt to break encryption.
Is there a file size limit on Unlock PDF?
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Yes: free accounts process documents up to 5 MB each, which covers most reports and contracts but not a long scanned document at 600 DPI; Ghostscript and qpdf do the work. Scanned PDFs are the usual thing that exceeds it, and compressing the document first is normally enough to bring it back under.
Will Unlock PDF lower the quality of my PDF documents?
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Text and vector artwork are objects rather than pixels, so they stay perfectly sharp at any zoom no matter what happens. Only the embedded raster images can degrade, and only if the operation you chose resamples them.
Can I run Unlock PDF on several PDF documents at once?
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Yes — upload the set and they process in parallel under one set of settings, which is the point of doing a document workflow here rather than clicking through a desktop reader.
Why does a EPUB site host Unlock PDF?
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EPUB.to is built around the open eBook format — XHTML in a zip, reflowable by design, and readable on hardware nobody has thought about the layout for. A book is a zip full of markup, images and fonts, so almost every job people bring to an eBook site is really a job on one of those things. Unlock PDF runs on the same upload and the same account as the conversions because that is where it is needed.
What should I do with the result once Unlock PDF is finished?
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The converter on this site moves books between EPUB, MOBI, AZW3, PDF and DOCX, so a title ends up on whatever hardware is actually going to read it. Doing that after Unlock PDF means the conversion is made from the version you settled on, not from the one you were still fixing.
Is Unlock PDF here the same tool the sibling sites run?
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The engines are shared — the same toolchain, the same workers, the same limits. What a EPUB site adds is a view on reflow: which of these operations a reflowable book genuinely supports, and which ones only make sense on the fixed-layout media inside it. It also starts from one fact about the format this site is named after: the book is a zip of XHTML with a manifest, so the text costs almost nothing and every decision that matters is about the embedded images and font subsets.
Do I need an account, and does anything get kept?
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No account, and nothing is kept: uploads are deleted from the workers shortly after the job finishes, nothing is read and nothing is indexed. Free accounts exist for history and batch size, not for access.
