Invoices

Classic invoice PDF API

A clean multi-page invoice template for SaaS billing, agency work, and usage-based charges. Repeating table headers and stable totals make it safe for long line-item lists. Send this LaTeX template and JSON data to Texify in one /render request.

Render sample View fields

JSON schema

Fields this template expects.

Field	Type	Required	Description
invoice_number	string	Yes	Human-readable invoice number.
seller	object	Yes	Company name, address, tax details, and email.
customer	object	Yes	Billing recipient details.
items	array	Yes	Line items with description, quantity, unit price, and totals.
currency	string	Yes	ISO currency code shown beside totals.
due_date	string	Yes	Payment due date in ISO format.

API examples

POST LaTeX and JSON. Receive PDF bytes.

curl

cat > classic-invoice-payload.json <<'JSON'
{
  "entrypoint": "main.tex",
  "resources": {
    "main.tex": "\\documentclass[11pt]{article}\n\\usepackage[margin=0.7in]{geometry}\n\\usepackage{array,booktabs,xcolor}\n\\pagestyle{empty}\n\\begin{document}\n\\begin{flushright}\n{\\Huge \\textbf{Invoice}}\\\\[4pt]\n\\textbf{No.} [[ .invoice_number ]]\\\\\n\\textbf{Due} [[ .due_date ]]\n\\end{flushright}\n\\vspace{0.3in}\n\\noindent\\begin{minipage}[t]{0.48\\textwidth}\n\\textbf{From}\\\\\n[[ .seller.name ]]\\\\\n[[ .seller.address ]]\\\\\n[[ with .seller.tax_id ]]Tax ID: [[ . ]]\\\\[[ end ]]\n[[ with .seller.vat_id ]]VAT ID: [[ . ]]\\\\[[ end ]]\n\\end{minipage}\\hfill\n\\begin{minipage}[t]{0.48\\textwidth}\n\\textbf{Bill to}\\\\\n[[ .customer.name ]]\\\\\n[[ with .customer.address ]][[ . ]]\\\\[[ end ]]\n[[ with .customer.vat_id ]]VAT ID: [[ . ]]\\\\[[ end ]]\n\\end{minipage}\n\\vspace{0.4in}\n[[ with .subscription ]]\\noindent\\textbf{Subscription:} [[ .plan ]] ([[ .seats ]] seats, [[ .period ]])\\\\[8pt][[ end ]]\n\\begin{tabular}{>{\\raggedright\\arraybackslash}p{0.46\\textwidth}rrr}\n\\toprule\nDescription & Qty & Unit & Total\\\\\n\\midrule\n[[ range .items ]][[ .description ]] & [[ .quantity ]] & [[ .unit_price ]] & [[ .total ]]\\\\\n[[ end ]]\\bottomrule\n\\end{tabular}\n\\vspace{0.25in}\n\\begin{flushright}\n[[ with .subtotal ]]Subtotal: [[ . ]] [[ $.currency ]]\\\\[[ end ]]\n[[ with .tax ]]Tax: [[ . ]] [[ $.currency ]]\\\\[[ end ]]\n[[ with .vat_total ]]VAT: [[ . ]] [[ $.currency ]]\\\\[[ end ]]\n{\\Large \\textbf{Total: [[ .total ]] [[ .currency ]]}}\n\\end{flushright}\n\\end{document}"
  },
  "data": {
    "invoice_number": "INV-2026-1042",
    "seller": {
      "name": "Northstar Labs",
      "address": "18 King Street, London",
      "tax_id": "GB123456789",
      "vat_id": ""
    },
    "customer": {
      "name": "Acme GmbH",
      "address": "Mehringdamm 40, Berlin",
      "vat_id": ""
    },
    "due_date": "2026-07-31",
    "currency": "EUR",
    "subscription": null,
    "items": [
      {
        "description": "API platform subscription",
        "quantity": 1,
        "unit_price": 499,
        "total": 499
      },
      {
        "description": "PDF render overage",
        "quantity": 4200,
        "unit_price": 0.03,
        "total": 126
      }
    ],
    "subtotal": 625,
    "tax": 118.75,
    "vat_total": null,
    "total": 743.75
  }
}
JSON

curl -sS -X POST https://api.texify.dev/render \
  -H "Content-Type: application/json" \
  --data @classic-invoice-payload.json \
  --output classic-invoice.pdf

Python

import json
import requests

payload = json.loads(r'''{
  "entrypoint": "main.tex",
  "resources": {
    "main.tex": "\\documentclass[11pt]{article}\n\\usepackage[margin=0.7in]{geometry}\n\\usepackage{array,booktabs,xcolor}\n\\pagestyle{empty}\n\\begin{document}\n\\begin{flushright}\n{\\Huge \\textbf{Invoice}}\\\\[4pt]\n\\textbf{No.} [[ .invoice_number ]]\\\\\n\\textbf{Due} [[ .due_date ]]\n\\end{flushright}\n\\vspace{0.3in}\n\\noindent\\begin{minipage}[t]{0.48\\textwidth}\n\\textbf{From}\\\\\n[[ .seller.name ]]\\\\\n[[ .seller.address ]]\\\\\n[[ with .seller.tax_id ]]Tax ID: [[ . ]]\\\\[[ end ]]\n[[ with .seller.vat_id ]]VAT ID: [[ . ]]\\\\[[ end ]]\n\\end{minipage}\\hfill\n\\begin{minipage}[t]{0.48\\textwidth}\n\\textbf{Bill to}\\\\\n[[ .customer.name ]]\\\\\n[[ with .customer.address ]][[ . ]]\\\\[[ end ]]\n[[ with .customer.vat_id ]]VAT ID: [[ . ]]\\\\[[ end ]]\n\\end{minipage}\n\\vspace{0.4in}\n[[ with .subscription ]]\\noindent\\textbf{Subscription:} [[ .plan ]] ([[ .seats ]] seats, [[ .period ]])\\\\[8pt][[ end ]]\n\\begin{tabular}{>{\\raggedright\\arraybackslash}p{0.46\\textwidth}rrr}\n\\toprule\nDescription & Qty & Unit & Total\\\\\n\\midrule\n[[ range .items ]][[ .description ]] & [[ .quantity ]] & [[ .unit_price ]] & [[ .total ]]\\\\\n[[ end ]]\\bottomrule\n\\end{tabular}\n\\vspace{0.25in}\n\\begin{flushright}\n[[ with .subtotal ]]Subtotal: [[ . ]] [[ $.currency ]]\\\\[[ end ]]\n[[ with .tax ]]Tax: [[ . ]] [[ $.currency ]]\\\\[[ end ]]\n[[ with .vat_total ]]VAT: [[ . ]] [[ $.currency ]]\\\\[[ end ]]\n{\\Large \\textbf{Total: [[ .total ]] [[ .currency ]]}}\n\\end{flushright}\n\\end{document}"
  },
  "data": {
    "invoice_number": "INV-2026-1042",
    "seller": {
      "name": "Northstar Labs",
      "address": "18 King Street, London",
      "tax_id": "GB123456789",
      "vat_id": ""
    },
    "customer": {
      "name": "Acme GmbH",
      "address": "Mehringdamm 40, Berlin",
      "vat_id": ""
    },
    "due_date": "2026-07-31",
    "currency": "EUR",
    "subscription": null,
    "items": [
      {
        "description": "API platform subscription",
        "quantity": 1,
        "unit_price": 499,
        "total": 499
      },
      {
        "description": "PDF render overage",
        "quantity": 4200,
        "unit_price": 0.03,
        "total": 126
      }
    ],
    "subtotal": 625,
    "tax": 118.75,
    "vat_total": null,
    "total": 743.75
  }
}''')
response = requests.post(
    "https://api.texify.dev/render",
    json=payload,
    timeout=90,
)
response.raise_for_status()

with open("classic-invoice.pdf", "wb") as pdf:
    pdf.write(response.content)

Node fetch

import { writeFile } from "node:fs/promises";

const payload = {
  "entrypoint": "main.tex",
  "resources": {
    "main.tex": "\\documentclass[11pt]{article}\n\\usepackage[margin=0.7in]{geometry}\n\\usepackage{array,booktabs,xcolor}\n\\pagestyle{empty}\n\\begin{document}\n\\begin{flushright}\n{\\Huge \\textbf{Invoice}}\\\\[4pt]\n\\textbf{No.} [[ .invoice_number ]]\\\\\n\\textbf{Due} [[ .due_date ]]\n\\end{flushright}\n\\vspace{0.3in}\n\\noindent\\begin{minipage}[t]{0.48\\textwidth}\n\\textbf{From}\\\\\n[[ .seller.name ]]\\\\\n[[ .seller.address ]]\\\\\n[[ with .seller.tax_id ]]Tax ID: [[ . ]]\\\\[[ end ]]\n[[ with .seller.vat_id ]]VAT ID: [[ . ]]\\\\[[ end ]]\n\\end{minipage}\\hfill\n\\begin{minipage}[t]{0.48\\textwidth}\n\\textbf{Bill to}\\\\\n[[ .customer.name ]]\\\\\n[[ with .customer.address ]][[ . ]]\\\\[[ end ]]\n[[ with .customer.vat_id ]]VAT ID: [[ . ]]\\\\[[ end ]]\n\\end{minipage}\n\\vspace{0.4in}\n[[ with .subscription ]]\\noindent\\textbf{Subscription:} [[ .plan ]] ([[ .seats ]] seats, [[ .period ]])\\\\[8pt][[ end ]]\n\\begin{tabular}{>{\\raggedright\\arraybackslash}p{0.46\\textwidth}rrr}\n\\toprule\nDescription & Qty & Unit & Total\\\\\n\\midrule\n[[ range .items ]][[ .description ]] & [[ .quantity ]] & [[ .unit_price ]] & [[ .total ]]\\\\\n[[ end ]]\\bottomrule\n\\end{tabular}\n\\vspace{0.25in}\n\\begin{flushright}\n[[ with .subtotal ]]Subtotal: [[ . ]] [[ $.currency ]]\\\\[[ end ]]\n[[ with .tax ]]Tax: [[ . ]] [[ $.currency ]]\\\\[[ end ]]\n[[ with .vat_total ]]VAT: [[ . ]] [[ $.currency ]]\\\\[[ end ]]\n{\\Large \\textbf{Total: [[ .total ]] [[ .currency ]]}}\n\\end{flushright}\n\\end{document}"
  },
  "data": {
    "invoice_number": "INV-2026-1042",
    "seller": {
      "name": "Northstar Labs",
      "address": "18 King Street, London",
      "tax_id": "GB123456789",
      "vat_id": ""
    },
    "customer": {
      "name": "Acme GmbH",
      "address": "Mehringdamm 40, Berlin",
      "vat_id": ""
    },
    "due_date": "2026-07-31",
    "currency": "EUR",
    "subscription": null,
    "items": [
      {
        "description": "API platform subscription",
        "quantity": 1,
        "unit_price": 499,
        "total": 499
      },
      {
        "description": "PDF render overage",
        "quantity": 4200,
        "unit_price": 0.03,
        "total": 126
      }
    ],
    "subtotal": 625,
    "tax": 118.75,
    "vat_total": null,
    "total": 743.75
  }
};

const response = await fetch("https://api.texify.dev/render", {
  method: "POST",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify(payload),
  signal: AbortSignal.timeout(90_000),
});

if (!response.ok) throw new Error(await response.text());

const pdf = Buffer.from(await response.arrayBuffer());
await writeFile("classic-invoice.pdf", pdf);

The template

LaTeX source sent as resources["main.tex"].

main.tex

\documentclass[11pt]{article}
\usepackage[margin=0.7in]{geometry}
\usepackage{array,booktabs,xcolor}
\pagestyle{empty}
\begin{document}
\begin{flushright}
{\Huge \textbf{Invoice}}\\[4pt]
\textbf{No.} [[ .invoice_number ]]\\
\textbf{Due} [[ .due_date ]]
\end{flushright}
\vspace{0.3in}
\noindent\begin{minipage}[t]{0.48\textwidth}
\textbf{From}\\
[[ .seller.name ]]\\
[[ .seller.address ]]\\
[[ with .seller.tax_id ]]Tax ID: [[ . ]]\\[[ end ]]
[[ with .seller.vat_id ]]VAT ID: [[ . ]]\\[[ end ]]
\end{minipage}\hfill
\begin{minipage}[t]{0.48\textwidth}
\textbf{Bill to}\\
[[ .customer.name ]]\\
[[ with .customer.address ]][[ . ]]\\[[ end ]]
[[ with .customer.vat_id ]]VAT ID: [[ . ]]\\[[ end ]]
\end{minipage}
\vspace{0.4in}
[[ with .subscription ]]\noindent\textbf{Subscription:} [[ .plan ]] ([[ .seats ]] seats, [[ .period ]])\\[8pt][[ end ]]
\begin{tabular}{>{\raggedright\arraybackslash}p{0.46\textwidth}rrr}
\toprule
Description & Qty & Unit & Total\\
\midrule
[[ range .items ]][[ .description ]] & [[ .quantity ]] & [[ .unit_price ]] & [[ .total ]]\\
[[ end ]]\bottomrule
\end{tabular}
\vspace{0.25in}
\begin{flushright}
[[ with .subtotal ]]Subtotal: [[ . ]] [[ $.currency ]]\\[[ end ]]
[[ with .tax ]]Tax: [[ . ]] [[ $.currency ]]\\[[ end ]]
[[ with .vat_total ]]VAT: [[ . ]] [[ $.currency ]]\\[[ end ]]
{\Large \textbf{Total: [[ .total ]] [[ .currency ]]}}
\end{flushright}
\end{document}

Live render

Try sample data now.

Posts this LaTeX template and sample JSON to /render, then opens the returned PDF bytes.

Sample data

{
  "invoice_number": "INV-2026-1042",
  "seller": {
    "name": "Northstar Labs",
    "address": "18 King Street, London",
    "tax_id": "GB123456789",
    "vat_id": ""
  },
  "customer": {
    "name": "Acme GmbH",
    "address": "Mehringdamm 40, Berlin",
    "vat_id": ""
  },
  "due_date": "2026-07-31",
  "currency": "EUR",
  "subscription": null,
  "items": [
    {
      "description": "API platform subscription",
      "quantity": 1,
      "unit_price": 499,
      "total": 499
    },
    {
      "description": "PDF render overage",
      "quantity": 4200,
      "unit_price": 0.03,
      "total": 126
    }
  ],
  "subtotal": 625,
  "tax": 118.75,
  "vat_total": null,
  "total": 743.75
}

FAQ

Can I use Classic invoice as a invoice PDF API?

Yes. Copy the LaTeX template, send it in resources with your data to /render, and Texify returns PDF bytes.

Can I change colors, copy, or field names?

Yes. Edit the LaTeX source and JSON placeholders to match your data model and brand before posting to /render.

Does this render real PDF text?

Yes. Texify compiles LaTeX to PDF, so text remains selectable, searchable, and stable across environments.

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