Most PDF forms arrive in one of two states, and the difference decides how you fill them. Some are real interactive forms with fields the author defined — an AcroForm — where the boxes are genuine inputs. Others are flat: a scan, or a form exported without its fields, where what looks like a box to type in is just a printed line. Tools that only handle one of the two are why people end up printing a form, filling it by hand and scanning it back.
This handles both. If the document has fields, they're detected when you open it and rendered as proper inputs — text boxes, checkboxes, radio groups and dropdowns — with a banner telling you how many were found, so you tab through the form the way the author intended. If it doesn't, the text tool lets you place text anywhere on the page and nudge it into position, which is the same result without the printer.
Either way the values are baked into the page when you download, so the person receiving it sees a completed form rather than an empty one with a layer of annotations on top. Everything happens on your own machine — which matters here more than almost anywhere else, because the forms people fill in are tax returns, medical intake sheets, visa applications and employment paperwork.
Combine files into one PDF and set the order before you merge.
Break a document into separate files by range or interval.
Drag pages into a new order, rotate or drop the ones you don't need.
Turn sideways or upside-down pages the right way up.
Pick pages to drop, visually or by range.
Keep only the pages you want as a separate file.
Combine JPG or PNG images into one PDF, with page size control.
Render pages to images at the resolution you choose.
Shrink a PDF with a side-by-side quality preview and a size target.
Add a searchable text layer to a scanned document.
Extract text as plain text or Markdown, in reading order.