Skip the print-sign-scan ritual
Lease applications, school enrollment packets, insurance claims, government forms — they arrive as fillable PDFs, and without Acrobat many people still print them, write by hand, and scan the result back. This tool reads the form's actual fields and lets you complete them in the browser: text boxes, checkboxes, radio choices, and dropdowns all appear as a simple form, and your answers are written back into the real fields, exactly as if a desktop PDF editor had done it.
Flatten, or leave editable
By default the filled form stays interactive — the recipient can still click into fields, useful when someone else completes their section next. Ticking flatten instead bakes your answers into the page itself and removes the interactive fields, so nothing can be quietly altered afterwards; that's the right choice for final submissions. Field names come from whoever built the form, so a label like "txt_04" is the form author's doing — the field still works.
What works, what honestly doesn't
This tool fills AcroForm fields — the standard PDF form technology, which covers the vast majority of fillable documents. Two exceptions are reported plainly instead of failing silently: XFA forms (a dynamic format some government agencies use, which only Adobe software can process), and PDFs with no form fields at all — a printed-looking form with blank lines isn't fillable; for those, the Sign PDF tool places free text and signatures anywhere on the page. And the privacy point matters most here: forms carry names, addresses, and ID numbers, and this one is completed entirely on your device — nothing you type is transmitted anywhere.