Fill PDF Form
Fill in interactive form fields, or add your own text, checkbox, signature, and dropdown fields.
shieldFiles stay on your device — processing runs in your browser.
- check_circleType into existing form fields and save the result
- check_circleDesign new text, checkbox, radio, dropdown, and signature fields
- check_circleSwitch between Design and Fill mode with one click
Fill in and create PDF forms in your browser
Complete interactive PDF forms by typing directly into their fields, or design new form fields — text boxes, checkboxes, radio buttons, dropdowns, and signature fields — on any PDF. Switch between Design and Fill modes with one click. All of it runs locally, so the forms you fill stay private.
How to fill out a PDF form
- 1Upload your PDF form using the drop area above.
- 2In Fill mode, click each field and type your answers, tick checkboxes, and choose dropdown options.
- 3Need fields that aren't there? Switch to Design mode and add text, checkbox, radio, dropdown, or signature fields.
- 4Export the completed form to download a filled, ready-to-send PDF.
Frequently asked questions
Can I fill a form that already has fields?
Yes. LumosPDF detects existing form fields so you can type into them directly in Fill mode.
What if my PDF has no form fields?
Switch to Design mode and add your own text, checkbox, radio, dropdown, and signature fields anywhere on the page.
Will the values I type be saved into the PDF?
Yes. When you export, your entries are written into the PDF so they appear in any reader.
Are the forms I fill kept private?
Completely. Everything is processed in your browser and never uploaded, so personal information on the form stays on your device.
Is the form filler free?
Yes, filling and building PDF forms is free and requires no account.