Fill PDF Forms Online Free (Text, Checkboxes and Dropdowns)

A fillable PDF stores real form fields - text boxes, checkboxes, radio buttons and dropdowns - inside the file. Filling them here writes into those AcroForm fields in your browser, so the values survive when you open the downloaded PDF in Adobe Reader, Preview or another viewer. If the PDF is not fillable yet, Edit Form lets you place new fields on the page, then switch back to Fill Form to complete them. Nothing is uploaded: the file is read and written locally with pdf-lib, which matters for tax forms, HR paperwork and anything else confidential.

Key benefits

• Runs entirely in your browser - tax forms and contracts never leave your device.
• Fills real AcroForm fields so values stay editable in other PDF readers (unless you flatten).
• Edit Form adds text, checkbox, radio and dropdown fields when the PDF was not fillable.
• Sidebar field list keeps multi-page forms organised.
• No account, no watermark and no upload limit beyond what your browser can handle.

How to use it, step by step

1. Add your PDF. Drop a fillable form or a blank PDF. Fields are detected automatically and listed in the sidebar.
2. Fill or edit. Use Fill Form to type into fields, tick checkboxes and pick dropdown values. Switch to Edit Form to click on the page and add new text, checkbox, radio or dropdown fields.
3. Review in the field list. The Form Field List shows every field by page. Click a name to jump to it and edit its value.
4. Download. Export a filled PDF. Optionally flatten fields so values become permanent page content and can no longer be changed.

Common use cases

• Completing government, school or HR fillable PDF forms without Adobe Acrobat.
• Turning a static PDF into a fillable form by adding fields in Edit Form mode.
• Filling checkboxes and dropdowns on multi-page applications.
• Preparing a flattened PDF when recipients should not change the answers.
• Working on confidential forms offline once the page has loaded.

Pro tips

• If no fields appear, the PDF may be a flat scan. Use Edit Form to place fields, or OCR first if you need selectable text.
• Flatten only when you are done - flattened fields cannot be edited later.
• Password-protected PDFs need Unlock PDF before form fields can be read.
• For a signature scribble rather than a form signature field, use PDF E-Signature.
• Check the sidebar count against the document - hidden or off-page widgets sometimes exist in poorly built forms.

Common mistakes to avoid

• Expecting a scanned paper form to be fillable. Scans are images until someone adds AcroForm fields.
• Flattening too early and losing the ability to correct a typo.
• Uploading sensitive forms to an online filler that stores files on a server. This tool never uploads.
• Confusing this with the Live PDF Editor, which draws annotations on top of the page rather than writing into form fields.

Frequently asked questions

How do I fill a PDF form online?

Upload your fillable PDF, use Fill Form mode to complete text fields, checkboxes, radios and dropdowns, then download the filled file. Everything stays on your device.

Can I fill a PDF that is not fillable?

Yes. Switch to Edit Form, choose a field type from the toolbar, and click on the page to place text boxes, checkboxes, radios or dropdowns. Then fill them as usual.

Is my PDF uploaded to a server?

No. Form detection, filling and export run entirely in your browser with pdf-lib. The file never leaves your device.

What does flatten fields mean?

Flattening turns filled values into permanent page content. Recipients see the answers but cannot edit the form fields. Leave flatten off if you still need an editable form.

Does this work with Adobe Acrobat fillable forms?

Yes for standard AcroForm fields (text, checkbox, radio, dropdown, list). XFA-only forms are not fully supported; the tool strips XFA when possible so AcroForm fields can be used.

Can I add a handwritten signature?

Use the PDF E-Signature tool for draw/type/upload signatures. This form filler focuses on AcroForm fields rather than freehand signatures.

People also search for

• fill pdf form online free
• fillable pdf filler
• fill pdf form without adobe
• edit pdf form fields
• add form fields to pdf
• fill pdf checkbox online
• pdf form filler no upload
• make pdf fillable online

Ready to get started? Open the Fill PDF Form and try it now - completely free.