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)
