"Fillable PDF form" usually means one of two different things, and it's worth being clear on which one you need before you start. One is authoring a new form — designing boxes and checkboxes that stay interactive for anyone who opens the file later. The other is completing a form you already have — typing your answers into it and sending it back.
The second case is far more common, and it's exactly what MakeitPDF's Fill & Sign PDF tool is built for — whether or not the PDF has real, interactive fields to begin with.
Key takeaways
- Need to fill out a form (with or without real fields)? Fill & Sign PDF does this directly.
- Need to build a reusable interactive form from scratch? That needs dedicated form-authoring software.
- Fill & Sign auto-detects existing form fields, and lets you type, tick or sign anywhere the PDF doesn't have them.
- The completed file downloads flattened — your entries become permanent, static content.
Table of contents
Building a brand-new interactive form
If you're designing a form from scratch — say, an intake form you'll send to many different people, each filling in their own copy with real clickable text boxes and checkboxes — that requires dedicated form-authoring software: Adobe Acrobat Pro's form tools, LibreOffice Writer's form controls (exportable to PDF), or an online form builder if you mainly need to collect responses rather than distribute a PDF. MakeitPDF doesn't currently offer this authoring step.
What MakeitPDF does very well is everything downstream of that: once a fillable form exists (yours or someone else's), or even if it's just a plain, non-interactive document, filling it out and returning it is fully covered below.
Filling out a form you already have
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1
Open Fill & Sign PDF and upload the form.
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2
If the PDF has real form fields, they're detected automatically — just click into each one and type.
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3
If there are no real fields (a scanned form, or a plain document), click anywhere to place text, checkmarks, or your signature manually.
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4
Download the completed, flattened PDF — ready to email or submit.
Frequently asked questions
How do I know if my PDF has real form fields?
Upload it to Fill & Sign PDF — if it has real fields, they're detected and highlighted automatically. If none are found, the tool tells you and switches to manual placement mode.
Can I add a signature the same way?
Yes — draw or type a signature directly in the tool, whether the PDF has a signature field or not. See our guide to signing a PDF for more detail.
Will the completed form stay editable for the next person?
No — the downloaded file is flattened, meaning your entries become permanent static content rather than editable field values. This is usually what you want for a submitted or returned form.
The form is just a scanned image — will manual placement still line up correctly?
Yes — you position each text box, checkmark or signature yourself directly on the page preview, so it works the same regardless of whether the underlying PDF has real fields.
