Invoice generator API

Send JSON, get back a finished invoice PDF. You don't need an HTML template or a headless browser. Totals, tax, discounts and currency formatting are handled for you.

Get a free API key See an example PDF

Example

curl https://pdfloom.dev/v1/invoice \
  -H "Authorization: Bearer $PDFLOOM_KEY" \
  -H "Content-Type: application/json" \
  -o invoice.pdf \
  -d '{
  "number": "INV-2026-0042",
  "currency": "USD",
  "date": "2026-10-18",
  "due": "2026-11-01",
  "from": "Acme Studio LLC\n500 Market St\nSan Francisco, CA",
  "to": "Globex Corp\nAccounts Payable\nbilling@globex.com",
  "items": [
    {
      "desc": "Website redesign",
      "qty": 1,
      "price": 4800
    },
    {
      "desc": "Hosting (monthly)",
      "qty": 12,
      "price": 25
    }
  ],
  "tax": 8.5,
  "discount": 200,
  "notes": "Pay by bank transfer within 14 days.\nIBAN: US00 0000 0000 0000",
  "accentColor": "#4f46e5"
}'

That request produces this PDF.

Fields

Name	Type	Description
`items`	array, required	Line items: `[{"desc": "…", "qty": 2, "price": 49.5}]`. Up to 500.
`docType`	string	`invoice` (default), `receipt`, `quote`, `estimate` or `proforma`. Changes the title and labels.
`number`	string	Document number, such as `INV-0042`.
`currency`	string	ISO code: USD, EUR, GBP, CAD, AUD, SEK, NOK, DKK, CHF, JPY, INR, BRL, MXN, ZAR, NZD, SGD or PLN.
`date / due`	string	Issue date and due date (or "valid until" / "paid on"), formatted `YYYY-MM-DD`.
`from / to`	string	Seller and buyer blocks. Use `\n` for line breaks.
`tax`	number	Tax rate in percent, applied after the discount.
`discount / shipping`	number	Absolute amounts.
`notes`	string	Payment terms, bank details, thank-you note.
`logo`	string	An `https://` image URL or a base64 `data:image/…` URI.
`accentColor`	string	Hex color for the title and the total line, such as `#4f46e5`.

Each call counts as one PDF against your plan, the same as /v1/pdf. Need full control over the design? Render your own HTML template with POST /v1/pdf.

Why use an invoice API?

No PDF library fights. Low-level PDF libraries make you position every line by hand. Here you send data and get a laid-out document back.
Works from any stack. One HTTPS call from Node, Python, PHP, Ruby, Go, or a no-code tool like Zapier or Make.
Nothing stored. Invoices are rendered in memory and never saved on our servers.

Prefer a form? Use the free online invoice generator.