Fill PDF form online — free, no Acrobat
Fill out any AcroForm PDF in your browser. Auto-detects all fields. Optional flatten so values can't be edited later.
Acrobat is overkill if you just need to fill one form. PDFOnly's Form Filler reads the AcroForm fields, presents them as a clean web form, writes your answers back into the PDF, and optionally flattens so they're locked in.
Works on most government forms (W-4, IRS schedules, USCIS, state forms), HR onboarding paperwork, intake forms, and most 'fillable' PDFs distributed online.
Frequently asked questions
What if my PDF doesn't have form fields?
If it's a scanned or designed-but-not-fillable PDF, there are no AcroForm fields to fill. Use Edit PDF (drag text overlays) or Sign PDF for a signature image.
Mobile-friendly?
Yes — fill forms on your phone or tablet. The web UI scales down cleanly.