BillCraft

Free professional invoice generator. No signup, no backend, no subscription. Create invoices in 60 seconds and export PDF with one click.

Try it now: billcraft-demo.surge.sh

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Features

• 3 Invoice Templates — Modern, Classic, Minimal styles
• One-Click PDF Export — No print dialog, direct download
• 7 Currencies — USD, EUR, GBP, CNY, JPY, KRW, HKD with proper formatting
• Logo Upload — Drag & drop your brand logo
• Tax & Discount — Auto-calculated on every change
• Bilingual — English + Chinese, switch anytime
• 100% Offline — All data in localStorage, nothing leaves your device
• Zero Dependencies — No React, no Node, no build step

Quick Start

# Just open index.html in a browser — that's it.

# Or use a local server for full PDF export support:
python -m http.server 8080
# Then open http://localhost:8080

Tech Stack

Layer	Tech
UI	Tailwind CSS (CDN)
App Logic	Vanilla JS, single IIFE module
PDF Export	html2canvas + jsPDF
i18n	Custom system with data-t attributes
Persistence	localStorage (auto-save drafts)

The entire project is one HTML + one JS + one CSS file. Download and run anywhere — even offline.

Architecture

• Single IIFE closure manages all state and logic
• Hybrid state: DOM-driven (form fields) + JS-driven (template, items, logo)
• App.update() -> renderPreview() -> saveDraft() on every keystroke
• Inline CSS in template literals for html2canvas PDF compatibility
• esc() sanitizes all user input against XSS

License

MIT — use it, fork it, share it.