Project case study 02 / 12

SG Invoice

A Singapore-focused invoice web app for small and home-based businesses. Create standard invoices, tax invoices, simplified tax invoices, receipts, and credit notes with GST calculations aligned to IRAS guidance. Features business profiles, PayNow QR codes, line-item discounts, dark/light theme, live print/PDF preview, and local-only storage with JSON export/import. Runs entirely in the browser and is deployed to GitHub Pages.

TypeScript
Vite
HTML
CSS

Updated 2026-11-07

SG Invoice project interface — SG Invoice project preview

Built by

Marcus Chan

Lead Full Stack Engineer & Cloud Architect

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SG Invoice: Try it Live SG Invoice: View Source Code