# QuickFreeInvoice

> QuickFreeInvoice is a free, professional online invoice & quotation generator designed for freelancers, contractors, consultants, and small businesses.

## Core Services

- [Home Page](https://quickfreeinvoicetool.com/): Free online invoice and quotation generator overview, key features, and user reviews.
- [Try It Out Playground](https://quickfreeinvoicetool.com/try-it-out): Instant interactive invoice editor playground to build and preview PDF invoices without logging in.
- [Pricing](https://quickfreeinvoicetool.com/pricing): Transparent free and Pro subscription plan comparison.
- [Account Registration](https://quickfreeinvoicetool.com/register): Free account registration portal for saving client databases and recurring invoices.
- [User Login](https://quickfreeinvoicetool.com/login): Secure user authentication portal with Multi-Factor Authentication (2FA) support.
- [Blog & Guides](https://quickfreeinvoicetool.com/blog): Articles, guides, and tax regulation news for freelancers and small businesses.

## Optional & App Endpoints

- [Dashboard](https://quickfreeinvoicetool.com/dashboard): Central account dashboard for revenue metrics, business profiles, and inventory management.
- [Invoice Builder](https://quickfreeinvoicetool.com/invoices/new): Multi-template interactive invoice builder with PDF and Word export options.
- [Quotation Builder](https://quickfreeinvoicetool.com/quotations/new): Estimate and quotation creator with one-click invoice conversion.
- [Analytics Dashboard](https://quickfreeinvoicetool.com/analytics): Detailed cash flow trends, client view tracking, and revenue analytics for Pro users.
- [Security Settings](https://quickfreeinvoicetool.com/security): Configure Multi-Factor Authentication (TOTP 2FA) and view login audit logs.

## System Architecture

- **Database:** Firebase Firestore for secure cloud storage of profiles, invoices, and analytics.
- **Authentication:** Firebase Authentication with 2FA/TOTP verification.
- **Document Export:** Client-side HTML5 canvas / jsPDF compiling for PDF downloads and docx compilation for Word exports.
- **Payments:** Paddle integration for Pro plan subscriptions.