What you need to do to turn a PDF into a fillable form

A fillable PDF form is a document where readers can type answers into boxes, check boxes, or select from dropdown menus without printing it out. To create one, you start with either a blank PDF or a scanned image of a paper form, then add interactive fields using PDF software. The most straightforward tools are Adobe Acrobat (the paid version, not the free Reader), free alternatives like LibreOffice Draw, or online converters that handle straightforward forms.

The process has two main paths: if you already have a form design in Word or another program, you export it as a PDF first, then add the interactive fields. If you have a paper form, you scan it and use the software's form recognition feature, which often detects where fields should go automatically. Either way, you end up with a document people can open, fill in, and either print or email back to you.

Key Takeaways

  • Fillable PDFs require form-creation software; the free Adobe Reader cannot create them, only fill them out.
  • Adobe Acrobat (paid) has the most automated form detection and works fastest for scanned paper forms.
  • LibreOffice Draw and other free tools can create fillable forms but require you to manually place each field.
  • You must save the final document as an interactive PDF, not a static one, or readers will not be able to type into it.
  • Test your form by opening it in a different PDF reader before sending it out, because some readers handle forms differently.

Starting with a design you already have in Word or another program

If your form exists as a Word document, Google Doc, or any other file format, the first step is to convert it to PDF. In Word, go to File, then Save As, and choose PDF from the format dropdown. In Google Docs, click File, then read, then PDF Document. Once you have the PDF, open it in your form-creation software.

In Adobe Acrobat, click the Tools menu, then select Prepare Form. Acrobat will scan the document and automatically detect where text fields, checkboxes, and other fields should go based on the layout. Review each detected field — you can delete ones it missed the purpose of, move fields that are in the wrong spot, or add new ones by hand. For each field, you can set whether it accepts text, numbers only, or specific formats like dates or phone numbers.

In LibreOffice Draw, open the PDF, then go to Form menu and select Design Mode. This lets you manually add fields by clicking Insert, then Form Control, and choosing the type you need. You will place each field by clicking and dragging on the document. This takes longer than Acrobat's automatic detection, but it gives you complete control and costs nothing.

Starting with a scanned paper form

Scan your paper form using a scanner or a phone scanning app (many phones have a built-in Notes app with scanning, or you can use a free app like Adobe Scan or Microsoft Lens). Save the scan as a PDF file. The image quality matters — if the text is blurry or tilted, the form-creation software will struggle to detect fields accurately, so take a clear, straight-on photo or scan.

Open the scanned PDF in Adobe Acrobat and click Tools, then Prepare Form. Acrobat uses optical character recognition to identify where fields should go based on the layout of your paper form. It will detect text boxes, checkboxes, radio buttons, and dropdown menus. Review the detected fields carefully, because OCR is not perfect — you may need to delete fields it created by mistake or add ones it missed. Adjust the position and size of each field so it aligns with the original form's layout.

If you do not have Adobe Acrobat, you can use a free online tool like Smallpdf or ILovePDF to convert a scanned form into a fillable PDF. Upload your scanned image, and the tool will attempt to detect fields automatically. The results are usually less precise than Acrobat, but for straightforward forms with clear layouts, they work well enough. read the result and test it before sending it to others.

Adding and configuring individual fields

Once you have a PDF open in your form software, you can add fields one at a time. In Adobe Acrobat, use the Tools menu to access form-editing options. Click where you want a field to appear, then choose the field type: text box for open-ended answers, checkbox for yes/no questions, radio button for multiple-choice questions where only one answer is correct, or dropdown for lists of preset options.

For each field, you can set a name (this is what the field is called internally and appears in the form data when someone submits it), a default value (text that appears before the person fills it in), and formatting rules. For example, a phone number field can be set to accept only 10 digits and automatically insert dashes. A date field can be set to accept only valid dates. These rules prevent people from entering garbage data and make the form easier to process later.

In LibreOffice Draw, the process is similar but more manual. Go to Insert, then Form Control, and choose your field type. Click and drag on the document to create the field, then right-click it and select Properties to set its name, default value, and any formatting rules. LibreOffice has fewer automatic formatting options than Acrobat, so you may need to add instructions in the form itself telling people what format to use.

Testing your form before you send it out

Before you share your form, open it in a different PDF reader than the one you used to create it. Adobe Reader (the free version) is the most common, so test there. Try filling in each field to make sure it accepts input the way you expect. Check that dropdown menus open and show all their options, that checkboxes actually check when you click them, and that text fields let you type without the text running off the edge of the box.

Save a test version with sample data filled in, then close it and reopen it to confirm the data stayed in place. Some PDF readers do not save form data by default, so you may need to tell people to use a specific reader or to print and sign the form instead of saving it digitally. If your form will be emailed back to you, ask a colleague to fill it out and email it to you so you can see what it looks like on their computer.

Pay special attention to how the form looks on a phone or tablet, because many people will open PDFs on mobile devices. Text fields that are too small or buttons that are too close together become frustrating on a small screen. If your form will be used on phones, test it there and consider making fields larger or reorganizing the layout to work better on narrow screens.

Saving your form so it stays fillable

When you save a PDF form, the software must save it in a way that preserves the interactive fields. In Adobe Acrobat, go to File, then Save As, and make sure you are saving it as a PDF (not as a PostScript file or any other format). The interactive fields will be preserved automatically. If you export it as an image or a different file type, the fields will disappear and people will only see a static picture of the form.

In LibreOffice Draw, go to File, then Export as PDF. A dialog box will appear with options. Make sure the "Create PDF Form" checkbox is selected, or the fields will not be interactive in the final document. If you just click Save and use the .odg format (LibreOffice's native format), the form will only be fillable in LibreOffice, not in other PDF readers.

After you save, open the file one more time to confirm the fields are still there and still work. This catches mistakes before you send the form to other people. If fields are missing or not working, go back to your original file, check your save settings, and try again.

Frequently Asked Questions

Can people fill out my PDF form on a phone or tablet?

Yes, as long as they use a PDF reader that supports interactive forms. Adobe Reader works on phones and tablets. Some other readers do not support form fields, so if you want to reach people on mobile devices, test your form in Adobe Reader on a phone before you send it out. You can also provide a printable version as a backup.

What if I want people to sign the form digitally instead of printing and signing by hand?

Adobe Acrobat lets you add a signature field that people can click to sign with their trackpad, mouse, or finger on a touchscreen. In the form-editing tools, select Signature Field and place it where you want the signature to go. People can then open the form, click the signature field, and draw or type their name. The signature will be embedded in the PDF.

Can I make certain fields required so people cannot submit the form without filling them in?

In Adobe Acrobat, right-click a field, select Properties, and check the Required checkbox. When someone tries to submit or save the form without filling in that field, they will see a warning. In LibreOffice Draw, you can add instructions telling people which fields are required, but the software does not enforce it automatically.

How do I collect the filled-out forms from people?

You can ask people to email the filled-out PDF back to you, or you can use a service like Adobe Document Cloud or Google Forms to collect responses. If you use email, make sure to tell people to save the form after filling it out, because some PDF readers do not save form data automatically. Test this with one person first to see what happens on their computer.

What if the form I created does not look right when someone else opens it?

This usually happens because the other person is using a different PDF reader or a different operating system. Test your form in Adobe Reader on both Windows and Mac, or on both a computer and a phone. If it looks wrong in one reader but right in another, you may need to simplify the form design or provide instructions telling people which reader to use.