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Fill PDF form

The form’s own fields, listed as soon as you drop it; fill what you need and save.

More free conversions, where you upload. The Fylane extension does the same work inside any upload form, on its own free share every day.About the extension

How to fill PDF form

  1. Drop the PDF form.
  2. Type into the fields; tick the boxes.
  3. Press Fill and download.

What happens to your file

The PDF’s own fields are read (pdf.js) and listed with the names the form gives them; what you fill is written into the file by qpdf — the value, and for a checkbox its state — and qpdf generates the appearance streams, so Acrobat, Preview, Chrome and the printer all show the same thing. Flatten makes the result a plain page that can no longer be edited.

Radio groups and signature fields are refused by name; a form with no fields says so and points at PDF to Word. XFA forms (LiveCycle) keep their values in XML and are not filled here.

Questions

Nothing is listed?

Then the PDF has no form fields — it is a picture of a form, or a flattened one. Use Edit PDF or PDF to Word instead.

Is it saved where I typed?

Yes — the values are written into the form fields themselves, as if typed in Acrobat, and shown by every viewer.

Do this in code

curl -X POST https://api.fylane.dev/v1/jobs \
  -H "Authorization: Bearer $FYLANE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "file_id": "<file id>",
    "operation": "pdf.fill",
    "options": {
      "flatten": "editable"
    }
  }'

The same operation, pdf.fill — Values written into a form’s fields — text, choice, checkbox — with appearances generated so every viewer shows them; flatten optional; radio groups and signatures refused by name. Upload first with the quickstart; every option is on the operations page. 500 free credits a month, then $5 per thousand.