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

Download and extract the files
Customize config.json with your company details
Add your logo file (optional – supports PNG, SVG, or text fallback)
Open index.html in a modern web browser
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)

InvioLite - Lightweight Professional Invoice Generator