Ten katalog nie jest juz zrodlem prawdy. Paczka zyje w osobnym
repozytorium — https://github.com/mrmaciej1/n8n-nodes-justfill — bo weryfikacja
wezlow spolecznosciowych n8n wymaga publikacji przez GitHub Actions z
provenance, a to wiaze artefakt z konkretnym repo i workflow. Zmiany rob TAM,
inaczej rozjada sie po cichu.

n8n-nodes-justfill

Fill existing PDF forms from n8n data — including scanned and flattened PDFs
that have no form fields at all.

You set the layout up once, visually, at justfill.app.
This node then fills that form for every item flowing through your workflow: a
spreadsheet row, a CRM record, a webhook payload. No re-detection per run, and
the original PDF is never rebuilt — layout, fonts and pagination stay exactly as
they were.

Installation

Settings → Community Nodes → Install → n8n-nodes-justfill

Credentials

Create an API key at justfill.app → Account → API keys. It starts with
jf_live_ and does not expire.

Operations

List Fields

Give it a PDF; it returns the field names of the saved layout. Use this once to
see what you can map onto.

[ { "name": "Patient name", "id": "f_name", "page": 1, "type": "text" },
  { "name": "Date",         "id": "f_date", "page": 1, "type": "text" } ]

Fill PDF

Give it the same PDF plus a Values object keyed by those names:

{ "Patient name": "{{ $json.customer }}", "Date": "{{ $now.format('yyyy-MM-dd') }}" }

Output: the filled PDF as binary, plus

Check watermarked. When an account runs out of clean output pages the API
still returns a perfectly valid PDF — with a watermark. Without branching on
this, a workflow will happily deliver watermarked documents to customers and
nothing will look broken.

Setting up a form

1. Open the PDF once at justfill.app.
2. Review the detected fields and fix any that are off — this is the step that
   makes every later run exact.
3. Save it as a template.

The node finds that template by hashing the PDF bytes, so the file you send
from n8n must be byte-identical to the one you saved. Re-downloading the same
blank form from the same source is fine; re-exporting or re-compressing it is
not, because that changes the bytes and no template will match.

Notes

• Fields you omit stay empty; checkboxes take "true", "yes" or "x".
• Fail on Unknown Field is on by default. Leaving it on is how you find out
  that a column was renamed, instead of shipping a half-empty form.
• Flatten bakes the values into the page. Turn it off to keep the result
  editable.

Licence

MIT