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Invoice Generation

Generate professional, branded invoices from your application data.

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Invoice Template

Here’s a complete HTML invoice template: 
<!DOCTYPE html>
<html>
<head>
  <meta charset="UTF-8">
  <style>
    * { margin: 0; padding: 0; box-sizing: border-box; }
    body {
      font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
      color: #1a1a1a;
      padding: 40px;
    }
    .header {
      display: flex;
      justify-content: space-between;
      margin-bottom: 40px;
    }
    .logo { font-size: 24px; font-weight: bold; color: #f05335; }
    .invoice-title { font-size: 32px; color: #666; }
    .info-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      margin-bottom: 40px;
    }
    .info-block h3 {
      font-size: 12px;
      text-transform: uppercase;
      color: #666;
      margin-bottom: 8px;
    }
    table { width: 100%; border-collapse: collapse; margin-bottom: 40px; }
    th {
      text-align: left;
      padding: 12px;
      border-bottom: 2px solid #1a1a1a;
      font-size: 12px;
      text-transform: uppercase;
    }
    td { padding: 12px; border-bottom: 1px solid #eee; }
    .amount { text-align: right; }
    .totals {
      width: 300px;
      margin-left: auto;
    }
    .totals tr td { border: none; padding: 8px 12px; }
    .totals .total {
      font-size: 18px;
      font-weight: bold;
      border-top: 2px solid #1a1a1a;
    }
    .footer {
      margin-top: 60px;
      padding-top: 20px;
      border-top: 1px solid #eee;
      font-size: 12px;
      color: #666;
    }
  </style>
</head>
<body>
  <div class="header">
    <div class="logo">Your Company</div>
    <div class="invoice-title">INVOICE</div>
  </div>

  <div class="info-grid">
    <div class="info-block">
      <h3>Bill To</h3>
      <p><strong>{{customer_name}}</strong></p>
      <p>{{customer_address}}</p>
      <p>{{customer_email}}</p>
    </div>
    <div class="info-block" style="text-align: right;">
      <h3>Invoice Details</h3>
      <p><strong>Invoice #:</strong> {{invoice_number}}</p>
      <p><strong>Date:</strong> {{invoice_date}}</p>
      <p><strong>Due Date:</strong> {{due_date}}</p>
    </div>
  </div>

  <table>
    <thead>
      <tr>
        <th>Description</th>
        <th>Qty</th>
        <th class="amount">Unit Price</th>
        <th class="amount">Amount</th>
      </tr>
    </thead>
    <tbody>
      {{#each items}}
      <tr>
        <td>{{description}}</td>
        <td>{{quantity}}</td>
        <td class="amount">${{unit_price}}</td>
        <td class="amount">${{amount}}</td>
      </tr>
      {{/each}}
    </tbody>
  </table>

  <table class="totals">
    <tr>
      <td>Subtotal</td>
      <td class="amount">${{subtotal}}</td>
    </tr>
    <tr>
      <td>Tax (10%)</td>
      <td class="amount">${{tax}}</td>
    </tr>
    <tr class="total">
      <td>Total</td>
      <td class="amount">${{total}}</td>
    </tr>
  </table>

  <div class="footer">
    <p>Thank you for your business!</p>
    <p>Payment is due within 30 days. Please include invoice number with payment.</p>
  </div>
</body>
</html>

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Python Example

import requests
from jinja2 import Template

# Your invoice data
invoice_data = {
    "customer_name": "Acme Corp",
    "customer_address": "123 Business St, Suite 100",
    "customer_email": "billing@acme.com",
    "invoice_number": "INV-2024-001",
    "invoice_date": "January 15, 2024",
    "due_date": "February 14, 2024",
    "items": [
        {"description": "API Access - Pro Plan", "quantity": 1, "unit_price": "29.00", "amount": "29.00"},
        {"description": "Additional Credits (1000)", "quantity": 2, "unit_price": "10.00", "amount": "20.00"},
    ],
    "subtotal": "49.00",
    "tax": "4.90",
    "total": "53.90"
}

# Load and render template
with open("invoice_template.html") as f:
    template = Template(f.read())

html = template.render(**invoice_data)

# Generate PDF
response = requests.post(
    "https://api.pdflet.dev/api/v1/pdf/",
    headers={"X-API-Key": "pk_live_your_api_key"},
    json={
        "html": html,
        "page_size": "Letter",
        "margin_top": "0.5in",
        "margin_bottom": "0.5in"
    }
)

conversion_id = response.json()["id"]
print(f"Invoice PDF queued: {conversion_id}")

​
JavaScript Example

import Handlebars from 'handlebars';
import fs from 'fs';

const invoiceData = {
  customer_name: "Acme Corp",
  customer_address: "123 Business St, Suite 100",
  customer_email: "billing@acme.com",
  invoice_number: "INV-2024-001",
  invoice_date: "January 15, 2024",
  due_date: "February 14, 2024",
  items: [
    { description: "API Access - Pro Plan", quantity: 1, unit_price: "29.00", amount: "29.00" },
    { description: "Additional Credits (1000)", quantity: 2, unit_price: "10.00", amount: "20.00" },
  ],
  subtotal: "49.00",
  tax: "4.90",
  total: "53.90"
};

const templateSource = fs.readFileSync('invoice_template.html', 'utf8');
const template = Handlebars.compile(templateSource);
const html = template(invoiceData);

const response = await fetch('https://api.pdflet.dev/api/v1/pdf/', {
  method: 'POST',
  headers: {
    'X-API-Key': 'pk_live_your_api_key',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    html,
    page_size: 'Letter',
    margin_top: '0.5in',
    margin_bottom: '0.5in'
  })
});

const { id } = await response.json();
console.log(`Invoice PDF queued: ${id}`);

​
Tips for Better Invoices

Use web fonts

Include Google Fonts via @import for professional typography

Print-friendly CSS

Use @media print for PDF-specific styles

Fixed dimensions

Use absolute units (px, cm, in) for consistent layout

Embed images as base64

Inline images with data URIs for reliable rendering