Developer tool
Inspect a PDF's form fields
Drop a PDF to list every AcroForm field — name, type, options — then
copy a ready-to-POST fields JSON and the exact API call
to fill it. No signup. Field detection runs in your browser.
Drop a PDF here, or
No PDF handy?
Fields
| Field name | Type | Options | Current value |
|---|
Ready-to-POST fields JSON
{}Fill it with the API
Swap in your values, grab a free API key, and you're filling PDFs from your own webhook or cron. Prefer a visual filler? Try the playground.
This PDF has no AcroForm fields to list. The Inspector reads fillable form fields — try a fillable PDF or our sample invoice. Need to combine files instead? Merge PDFs in the playground.
Field detection runs entirely in your browser (pdf.js) — nothing is uploaded until you call the API. Read the fill-form API docs.