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Fill PDF Form

Type into fillable PDF form fields and save the completed form.

Your files never leave your device.

When to use it

Fill PDF Form lets you type answers into a PDF that has fillable fields, then save a completed copy. Use it for government forms, job and rental applications, school permission forms, insurance claims and tax documents that arrive as PDFs. Typed answers are neater than handwriting, and you can send the completed form without printing or scanning anything.

How to fill in a PDF form

  1. Tap Choose PDF file, or drag the form onto the box.
  2. The form’s fields appear in the order the form defines them: text boxes, checkboxes, radio buttons and drop-down menus.
  3. Fill in each field. Required fields and their labels come from the form itself.
  4. Tick Lock the answers so they can’t be changed (flatten) for a final copy.
  5. Press Save filled PDF, then Download. The file ends in “-filled.pdf”.

A worked example

A school sends a 2-page trip consent form with fields for the child’s name, class, emergency contact, two “Yes / No” medical questions and a date. Open it, type the details, choose the answers from the radio buttons, and enter the date. Tick flatten so nothing can change, press Save filled PDF and download it. Then open the result in Sign PDF to add your signature before emailing it back.

What can be filled in

  • Text boxes, including multi-line boxes for addresses and comments.
  • Checkboxes for yes/no and “I agree” questions.
  • Radio buttons, where you choose one option from a group.
  • Drop-down menus and lists, such as country or title.

Signature fields aren’t filled here; add your signature afterwards with Sign PDF.

Tips

  • Check the date format the form asks for, such as DD/MM/YYYY or MM/DD/YYYY.
  • Keep answers short in small boxes; long text may be shrunk or cut off by the form’s design.
  • Save an unflattened copy too if you might need to correct something later.
  • Open the result in your normal PDF reader to check every answer before sending.

Common mistakes

  • Uploading a scanned form. Scans have no fields; use Sign PDF to place your signature, or print it.
  • Flattening too early, then finding a mistake. Keep the unflattened version until you’re sure.
  • Using emoji or symbols the form’s font can’t show.
  • Forgetting to sign, when the form needs a signature; filling fields doesn’t add one.

Private by design

Personal details stay on your device. The form is filled and saved in your browser and never uploaded.

Add a signature with Sign PDF, lock interactive elements with Flatten PDF, or add a password with Protect PDF.

Frequently asked questions

How do I know if my PDF can be filled in?

Open it here. If it has fillable fields, they appear as boxes, checkboxes and menus you can complete. If the tool says there are no fillable fields, the form is a flat scan or image; you can sign it with Sign PDF or print it.

What does "flatten" mean?

Flattening turns your answers into regular page content, so they can't be edited and look the same in every PDF reader. Choose it for the final copy you send; leave it off if you or someone else still needs to change answers.

Why do some characters not work?

Each form uses a font chosen by its creator, and some fonts lack emoji or non-Latin letters. If that happens, you'll see a message; remove those characters and save again.

Can I sign the form too?

Yes. Save the filled PDF, then open it in Sign PDF to add your signature.

Are my answers stored?

No. The form is filled in your browser and never uploaded, which matters for tax, medical and immigration forms.

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