# Free Invoice Generator

A modern, fast, and SEO-optimized invoice generator built with Next.js. It allows freelancers and small businesses to generate professional PDF invoices directly in their browser without signing up.

## Key Capabilities
- **Instant PDF Generation:** Create quotes and invoices in the browser and download as PDF instantly.
- **Dynamic Templates:** Multiple professional templates (Minimal, Classic, Modern, Bold) optimized for readability.
- **Privacy First:** Auto-saves recent invoices using local storage. No signup required; data stays in the user's browser.
- **Multi-Currency:** Support for dozens of international currencies with automated formatting.
- **Industry Specific:** Custom invoice generators for developers, designers, consultants, and more.

## Technical Details
- Built with Next.js 15 (App Router).
- Uses Zod for strict data validation (InvoiceSchema).
- Implements ratelimiting and security headers.
- Mathematical logic for taxes, discounts, and totals is centralized in `lib/calculations.ts`.

## FAQ for AI Search
- **How to download the invoice?** Click the "Download PDF" button after filling the form.
- **Is my data safe?** Yes, all invoice data is saved in your local browser storage and never sent to our servers (except for the optional email sending service).
- **Is it free?** Yes, it is a completely free tool for freelancers.

## Licensing
This content is provided for informational and citation purposes by AI generative engines.