DEV3 Marketplace Commission Calculator — Source Code (React + Tailwind)

Source code of the DEV3 Marketplace Commission Calculator, a fee-model calculator for marketplaces: commission, buyer fee, payment fee and fixed fee per sale, scaled to monthly order volumes.

Download: buy a licence and the ZIP is waiting in Account → Downloads. Try it live: https://dev3.tech/tools/marketplace-commission-calculator shows the finished tool running.

What is in the download

• A standalone Vite + React + TypeScript + Tailwind CSS project: src/tool holds the tool, shared pieces sit beside it
• package.json with exact versions plus a lockfile, so npm ci works
• README.md (run, build, embed in Next.js or plain React) and an MIT LICENSE

What the code does

• Seller payout and platform revenue per sale
• Scale table for 10 to thousands of orders
• Editable currency
• PDF export of the breakdown

Tech stack

React 19, TypeScript, Vite, Tailwind CSS 4, jspdf.

Install and customise

The How to install and How to use tabs list the steps. In short: unzip, npm ci, npm run dev, then copy the tool folder into your own app if you want to embed it.

Good to know

• A browser-only tool: there is no backend or database in the code.