Finance

Invoice PDF generator API

A clean, itemized invoice with totals, tax and payment terms — the most-requested PDF for any business.

Generate polished, itemized invoice PDFs programmatically — no headless Chrome to babysit and no HTML to hand-code. Describe the invoice you need (or start from this template), then POST your billing data to a single endpoint and get a print-ready PDF back.

Handlebars tokens handle line items, subtotals, tax and currency formatting, so the same template renders correctly for every customer. Loop over your orders and create one invoice per record at scale.

Generate a Invoice PDF via the API

POST your data to /api/v1/generate and get a PDF back. Copy-paste an example, swap in your API key, and loop over a list to render thousands — one invoice per record.

curl -X POST https://pdfgen.com/api/v1/generate \
  -H "Authorization: Bearer pdfg_live_xxx" \
  -H "Content-Type: application/json" \
  -d '{
    "html": "<div style=\"max-width:760px;margin:0 auto;padding:48px;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;color:#111827;\">\n  <div style=\"display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:40px;\">\n    <div>\n      <h1 style=\"font-size:24px;font-weight:800;margin:0;\">{{company.name}}</h1>\n      <p style=\"color:#6b7280;margin:6px 0 0;font-size:13px;white-space:pre-line;\">{{company.address}}</p>\n    </div>\n    <div style=\"text-align:right;\">\n      <h2 style=\"font-size:30px;letter-spacing:3px;color:#4f46e5;margin:0;font-weight:800;\">INVOICE</h2>\n      <p style=\"margin:8px 0 0;color:#6b7280;font-size:13px;\">#{{invoiceNumber}}</p>\n      <p style=\"margin:2px 0 0;color:#6b7280;font-size:13px;\">{{formatDate issuedDate}}</p>\n    </div>\n  </div>\n  <div style=\"display:flex;justify-content:space-between;margin-bottom:32px;\">\n    <div>\n      <p style=\"font-size:11px;text-transform:uppercase;letter-spacing:1px;color:#9ca3af;margin:0 0 6px;\">Billed to</p>\n      <p style=\"margin:0;font-weight:600;\">{{client.name}}</p>\n      <p style=\"margin:2px 0 0;color:#6b7280;font-size:13px;white-space:pre-line;\">{{client.address}}</p>\n    </div>\n    <div style=\"text-align:right;\">\n      <p style=\"font-size:11px;text-transform:uppercase;letter-spacing:1px;color:#9ca3af;margin:0 0 6px;\">Due</p>\n      <p style=\"margin:0;font-weight:600;\">{{formatDate dueDate}}</p>\n    </div>\n  </div>\n  <table style=\"width:100%;border-collapse:collapse;font-size:14px;\">\n    <thead>\n      <tr style=\"background:#f9fafb;text-align:left;\">\n        <th style=\"padding:12px;border-bottom:1px solid #e5e7eb;\">Description</th>\n        <th style=\"padding:12px;border-bottom:1px solid #e5e7eb;text-align:center;\">Qty</th>\n        <th style=\"padding:12px;border-bottom:1px solid #e5e7eb;text-align:right;\">Unit</th>\n        <th style=\"padding:12px;border-bottom:1px solid #e5e7eb;text-align:right;\">Amount</th>\n      </tr>\n    </thead>\n    <tbody>\n      {{#each items}}\n      <tr>\n        <td style=\"padding:12px;border-bottom:1px solid #f3f4f6;\">{{description}}</td>\n        <td style=\"padding:12px;border-bottom:1px solid #f3f4f6;text-align:center;\">{{quantity}}</td>\n        <td style=\"padding:12px;border-bottom:1px solid #f3f4f6;text-align:right;\">{{formatCurrency unitPrice currency}}</td>\n        <td style=\"padding:12px;border-bottom:1px solid #f3f4f6;text-align:right;\">{{formatCurrency amount currency}}</td>\n      </tr>\n      {{/each}}\n    </tbody>\n  </table>\n  <div style=\"display:flex;justify-content:flex-end;margin-top:24px;\">\n    <table style=\"font-size:14px;min-width:240px;\">\n      <tr><td style=\"padding:4px 0;color:#6b7280;\">Subtotal</td><td style=\"padding:4px 0;text-align:right;\">{{formatCurrency subtotal currency}}</td></tr>\n      <tr><td style=\"padding:4px 0;color:#6b7280;\">Tax ({{taxRate}}%)</td><td style=\"padding:4px 0;text-align:right;\">{{formatCurrency tax currency}}</td></tr>\n      <tr><td style=\"padding:12px 0 0;font-weight:800;font-size:16px;\">Total</td><td style=\"padding:12px 0 0;text-align:right;font-weight:800;font-size:16px;color:#4f46e5;\">{{formatCurrency total currency}}</td></tr>\n    </table>\n  </div>\n  <p style=\"margin-top:48px;font-size:12px;color:#9ca3af;border-top:1px solid #f3f4f6;padding-top:16px;\">{{notes}}</p>\n</div>",
    "engine": "handlebars",
    "format": "A4",
    "data": {
      "company": {
        "name": "Northwind Studio",
        "address": "120 Market St\nSan Francisco, CA 94103"
      },
      "client": {
        "name": "Acme Corp",
        "address": "88 Industrial Way\nAustin, TX 78701"
      },
      "invoiceNumber": "INV-2026-014",
      "issuedDate": "2026-06-01",
      "dueDate": "2026-06-15",
      "currency": "USD",
      "items": [
        {
          "description": "Brand design system",
          "quantity": 1,
          "unitPrice": 3200,
          "amount": 3200
        },
        {
          "description": "Landing page build",
          "quantity": 1,
          "unitPrice": 2400,
          "amount": 2400
        },
        {
          "description": "Revision rounds",
          "quantity": 3,
          "unitPrice": 150,
          "amount": 450
        }
      ],
      "subtotal": 6050,
      "taxRate": 8.5,
      "tax": 514.25,
      "total": 6564.25,
      "notes": "Payment due within 14 days. Thank you for your business!"
    }
  }' --output invoice.pdf

Working in another language? Follow a full guide for your stack:

Node.jsNext.jsReactPythonDjangoRuby on RailsLaravelPHPGo

What you can build

  • Auto-emailing invoices after every Stripe or checkout payment
  • Monthly billing runs that generate one invoice per subscriber
  • Embedding "Download invoice" buttons in your SaaS dashboard
  • Bulk-exporting historical invoices for accounting or audits

Frequently asked questions

How do I generate invoice PDFs in bulk?
Save the invoice template once, then loop over your records and call /api/v1/generate with each invoice’s data. Every call returns a PDF, so a list of 5,000 orders becomes 5,000 invoices without any browser to manage.
Can I add my own logo, colours and tax rules?
Yes. The template is plain HTML with Handlebars tokens, so you can edit the layout in the AI studio or by hand — swap the logo, brand colours, add VAT/GST lines or multiple tax rates — and the API renders your version.
How is currency and tax formatting handled?
The template uses the built-in formatCurrency and formatDate helpers, so amounts and dates render consistently from raw numbers in your data — pass 6564.25 and "USD" and it prints $6,564.25.

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Ship your invoice PDF endpoint today

Generate this template with AI, tweak it to match your brand, then render at scale with a single API call — no headless browsers to babysit.