2Fill any interactive fields directly; on a flat scanned form, click where an answer belongs and type it there.
3Add a drawn or typed signature if the form asks for one — that is a visible mark, not a certificate-based digital signature.
4Flatten the form so the answers cannot be altered, then download the completed PDF file.
Fill PDF Forms FAQ
Can I add a signature?
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You can draw or type a signature and place it, which is what most forms ask for. That is a visible mark, not a cryptographic digital signature — if you need the latter, it has to be applied by a certificate-based signing tool.
How does Fill PDF Forms fill in a form?
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Concretely, AcroForm fields are detected and filled with real field values, so the result is a properly filled form rather than text drawn on top of a picture of one; flattening afterwards is optional and is what stops recipients editing the answers. Interactive fields are filled as fields; on a flat scanned form you place text yourself where it needs to go.
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 how the completed form behaves for the recipient.
Should I flatten the form before sending it?
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Usually yes. Flattening converts the field values into fixed page content so the recipient sees exactly what you filled in and cannot alter it. Leave it unflattened only if someone downstream still has to complete more of it.
What can I upload to Fill PDF Forms?
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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 Fill PDF Forms?
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Yes: free accounts process documents up to 25 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 Fill PDF Forms 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 Fill PDF Forms 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 Fill PDF Forms?
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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. Fill PDF Forms 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 Fill PDF Forms 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 Fill PDF Forms means the conversion is made from the version you settled on, not from the one you were still fixing.
Is Fill PDF Forms 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.
