What PDFs can I fill?

PDFs that already contain interactive AcroForm fields (text, checkboxes, radios, dropdowns). Flat scanned PDFs need OCR or the PDF Editor instead.

No. Field detection and filling happen entirely in your browser.

Can I lock the fields after filling?

Yes. Enable “Flatten on download” to bake values into the page so the form is no longer editable.

Yes. Complete fillable PDFs for free after you sign in.

The PDF may be a flat scan or image-only form. Use OCR PDF or the PDF Editor to add text instead.

No. Form filling runs in your browser and exports a standard PDF.

In browser

Open a fillable PDF, complete text fields, checkboxes, and dropdowns, then download. Your file never leaves your device.

Drop a fillable PDF here or click to browse

Max 100 MB · form filling stays in your browser

Formats	PDF
Tool	Fill PDF Forms

Open a fillable PDF, complete the detected form fields in the sidebar, preview if you want, then download. Everything stays in your browser.

What PDFs can I fill?: PDFs that already contain interactive AcroForm fields (text, checkboxes, radios, dropdowns). Flat scanned PDFs need OCR or the PDF Editor instead.
Is my form uploaded?: No. Field detection and filling happen entirely in your browser.
Can I lock the fields after filling?: Yes. Enable “Flatten on download” to bake values into the page so the form is no longer editable.
Is Fill PDF Forms free?: Yes. Complete fillable PDFs for free after you sign in.
What if no fields are detected?: The PDF may be a flat scan or image-only form. Use OCR PDF or the PDF Editor to add text instead.
Do I need Adobe Acrobat?: No. Form filling runs in your browser and exports a standard PDF.

Nothing is uploaded. Your PDF is filled in browser memory and discarded when you close or reload the page.