Admin ToolsFinance / Operationsv1.0.0

Smart Invoice Generator

Name: Smart Invoice Generator
Brand: Grid Theory
Price: 99.00 USD
Availability: InStock

Smart Invoice Generator is a production-ready TypeScript invoice engine that delivers zero-dependency, client-side invoice generation with built-in tax calculations, multi-currency support, and AI-powered line-item suggestions. Unlike typical invoice libraries that require backend dependencies or third-party services, this solution runs entirely in the browser with a robust math engine handling line-item discounts, compound taxes, and PDF export through optimized print styles. Perfect for SaaS platforms, digital agencies, and freelance marketplaces needing white-label invoice generation without the overhead of external APIs or server-side processing.

Built for Developers and businesses needing programmatic invoice generation with potential AI-enhanced features

TypeScriptHTMLDOM API

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Interactive Preview

Live frontend preview with mock data — the full product includes the complete source code and backend

The architecture features a modular TypeScript design with separated concerns: a calculation engine for precise invoice math, an HTML renderer for professional layouts, and a provider-agnostic AI adapter supporting OpenAI, Anthropic, Ollama, or custom REST endpoints for intelligent line-item suggestions and risk flagging. The framework-agnostic implementation works seamlessly with vanilla JavaScript, React, Vue, or any modern stack through a simple mounting API.

Ship with four pre-built themes (Dark, Light, Slate, Amber), complete CSS variable customization, comprehensive event hooks for state management, and a standalone preview demonstrating agency, SaaS, and freelance scenarios. The package includes TypeScript definitions, integration guides for major frameworks, and an AI context document for enhanced development workflows.

Features

Zero-dependency TypeScript engine with client-side calculations for line items, taxes, discounts, and totals

Built-in browser print-to-PDF generation with optimized @media print styles

Provider-agnostic AI adapter supporting OpenAI, Anthropic, Ollama for line-item suggestions and risk flagging

Multi-currency support with automatic formatting and locale-aware number display

Compound tax calculations with line-item and invoice-level discount support

Four built-in themes (Dark, Light, Slate, Amber) customizable via CSS variables

Framework-agnostic integration with React, Vue, and vanilla JavaScript examples

Event-driven architecture with change and export callbacks for real-time updates

What This Solves

Automated invoice generation for SaaS billing systems

Client-side invoice creation for freelance platforms

Multi-currency invoicing for international businesses

AI-enhanced line item suggestions for professional services

White-label invoice generation for digital agencies

PDF invoice export for accounting software integrations

How to Integrate

4 integration paths from simple to advanced. Full guide included with your purchase.

Vanilla JavaScript

React

Vue 3

AI Integration

Complete integration guide with code examples included with purchase

What's Included

Everything you need to ship — no surprises.

Zero-dependency TypeScript invoice engine with calculation logic

AI adapter supporting OpenAI, Anthropic, Ollama integrations

4 pre-built themes (Dark, Light, Slate, Amber) with CSS variables

Standalone preview.html with 3 live invoice scenarios

Complete TypeScript source with modular architecture

Browser-based PDF export with optimized print styles

Framework integration examples for React, Vue, and Vanilla JS

GRID_AI_CONTEXT.md for AI coding assistant integration

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$99one-time

Full source code
GRID_AI_CONTEXT.md included
12 months of updates
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Disclaimer: This product is sold as-is under the Grid Theory Library Terms. All purchases are final. Products are delivered as source code and are intended for use by developers and technical teams. Grid Theory makes no guarantees regarding fitness for a particular purpose, uptime, or compatibility with third-party services. The interactive preview shown on this page uses mock data and may not represent the full functionality of the delivered product. White-label rights, where applicable, permit rebranding and redistribution under the terms of the license agreement — resale of the original source code as a standalone product is prohibited. By purchasing, you agree to the Terms of Service and Privacy Policy.