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HTML Invoice Generator: Professional Templates & Complete Guide
Creating professional HTML invoices that convert perfectly to PDF is essential for any business. Whether you're a freelancer, SaaS company, or e-commerce platform, you need invoices that look professional, are easy to customize, and generate flawlessly as PDFs.
In this guide, we'll show you 5 beautiful invoice templates ranging from minimal to modern, all with live PDF generators. Each template uses Nunjucks templating to dynamically inject data, making them production-ready for your applications.
Table of Contents
Template 1: Minimal Professional Invoice
A clean, minimalist invoice template perfect for freelancers and consultants. Features a simple two-column layout with clear typography and subtle borders.
Features
- Clean, distraction-free design
- Automatic subtotal and tax calculations
- Professional typography with system fonts
- Responsive layout that works on all page sizes
Best For
Freelancers, consultants, and small service businesses who want a simple, professional invoice without unnecessary visual elements.
Template 2: Modern Gradient Invoice
A contemporary invoice with a striking gradient header and modern design elements. Perfect for creative agencies and tech startups who want to make a visual impact.
Features
- Eye-catching gradient header
- Custom brand colors support
- Rounded corners and modern spacing
- Professional table styling
Best For
Creative agencies, tech startups, and design studios who want their invoices to reflect their modern brand identity.
Template 3: Classic Business Invoice
A traditional business invoice with formal styling and comprehensive information display. Includes company logo placement, detailed contact information, and payment terms.
Features
- Logo placement area
- Detailed company and client information
- Payment terms and due date
- Bank details section
Best For
Established businesses, B2B companies, and enterprises that need formal, comprehensive invoicing with all legal details.
How the Template System Works
All these templates use Nunjucks, a powerful templating engine that lets you inject dynamic data into HTML. This makes it easy to generate personalized invoices for each customer without manually editing HTML.
Why Nunjucks + CustomJS?
- Separation of concerns: Keep your design (HTML) separate from your data (JSON)
- Reusability: One template generates thousands of invoices
- Easy updates: Change the design once, all invoices update
- Type safety: JSON data is easy to validate and test
- No manual work: Fully automated invoice generation
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