InvioLite – Professional Invoice Generator

Create beautiful, professional invoices, quotes, and proforma invoices with ease. No installation required – works entirely in your browser!

InvioLite is a modern, production-ready invoice generator built with vanilla JavaScript. Perfect for small businesses, freelancers, consultants, and anyone who needs to create professional invoices quickly without complex software or monthly subscriptions.

Key Features

• Multiple Document Types – Create invoices, proforma invoices, and quotes
• Multi-Currency Support – TRY, USD, EUR, GBP with proper formatting
• Multi-Language Interface – 9 languages: Turkish, English, German, Italian, Bulgarian, Russian, Portuguese, French, Spanish
• 5 Professional Templates – Classic Professional, Payment Providers Inspired, Commercial, Design, and Physical
• Live Preview – Real-time invoice preview that updates as you type
• Auto-Save & Backup – Automatically saves every 2 seconds, export/import JSON backups
• PDF Export – Generate high-quality PDF files using html2pdf.js
• Flexible Pricing – Configurable tax rates, percentage or fixed discounts
• Secure – XSS protection, input sanitization, safe DOM manipulation
• Responsive Design – Works perfectly on desktop, tablet, and mobile
• Comprehensive Documentation – Complete documentation included
• ⚙️ Easy Customization – Centralized configuration via config.json
• ♿ Accessible – ARIA labels, keyboard navigation, semantic HTML

Professional Templates

Choose from 5 beautifully designed templates:

• Template 1: Classic Professional – Traditional business invoice with bold orange accent bar
• Template 2: Payment Providers Inspired – Clean, modern design inspired by Payment Providers invoices
• Template 3: Commercial – Professional B2B invoice with structured layout
• Template 4: Design – Creative and modern with purple gradient header
• Template 5: Physical – Traditional paper invoice style with borders

Technical Details

Technology Stack:

• Vanilla JavaScript (ES6+)
• HTML5
• CSS3
• html2pdf.js (CDN-loaded)
• No frameworks required
• No build process

Browser Compatibility:

• ✅ Chrome (latest)
• ✅ Firefox (latest)
• ✅ Safari (latest)
• ✅ Edge (latest)

Quick Start

1. Download and extract the files
2. Customize config.json with your company details
3. Add your logo file (optional – supports PNG, SVG, or text fallback)
4. Open index.html in a modern web browser
5. Start creating professional invoices!

⚙️ Configuration

All customization is done through the config.json file:

• Company Information: Name, logo, address, contact details
• Branding: Primary colors, header bar colors
• Invoice Defaults: Default tax rate, currency, date format
• Template Selection: Choose from 5 professional templates
• Footer Configuration: Control visibility of footer elements

Complete Feature List

• Live preview with real-time updates
• Multiple document types (Invoice, Proforma Invoice, Quote)
• Multi-currency support (TRY, USD, EUR, GBP)
• Configurable tax/VAT rates
• Percentage or fixed amount discounts
• Unlimited line items
• High-quality PDF export
• Auto-save to localStorage
• Export/Import JSON backups
• Print-optimized styles
• Multi-language support (9 languages)
• Logo support (PNG, SVG, or text fallback)
• Fully responsive design
• Accessibility features (ARIA labels, keyboard navigation)
• XSS protection and input validation

Perfect For

• Small businesses
• Freelancers
• Consultants
• Service providers
• E-commerce businesses
• International businesses

Documentation

Comprehensive documentation is included:

• README.md – Complete user guide
• LICENSE.md – Commercial license agreement
• TERMS_OF_SALE.md – Terms of sale
• DOCUMENTATION.html – Documentation
• Inline code comments

What’s Included

• ✅ Complete source code (HTML, CSS, JavaScript)
• ✅ 5 professional invoice templates
• ✅ Multi-language translation files (9 languages)
• ✅ Configuration system
• ✅ SVG logo files
• ✅ Comprehensive documentation
• ✅ Example configuration file
• ✅ Print-optimized styles
• ✅ PDF export functionality
• ✅ No dependencies (except CDN-loaded html2pdf.js)
• ✅ Import / Export Functionality
• ✅ Auto-Save Functionality
• ✅ Comprehensive Documentation

Customization

InvioLite is designed to be easily customizable:

• Edit config.json for company details and branding
• Replace logo files with your own
• Modify CSS variables for colors
• Add custom templates by creating new CSS files
• Add new languages by extending translations.json
• Modify HTML structure for custom layouts
• Extend JavaScript functionality

Security

• XSS protection – All user inputs are sanitized
• Input validation – Prevents invalid data entry
• Safe DOM manipulation – Uses textContent instead of innerHTML
• No server required – Runs entirely client-side
• Local storage – Data stored locally in browser

Responsive & Mobile-Friendly

The application is fully responsive and works seamlessly on:

• Desktop computers
• Laptops
• Tablets
• Mobile phones

Multi-Language Support

Fully translated in 9 languages :

• Turkish (Türkçe) – Default
• English
• German (Deutsch)
• Italian (Italiano)
• Bulgarian (Български)
• Russian (Русский)
• Portuguese (Português)
• French (Français)
• Spanish (Español)