DEV3 Free CSV to JSON Converter — Source Code (React + Tailwind)

Source code of the DEV3 CSV to JSON Converter, a two-way CSV and JSON converter with delimiter detection, header handling, type inference and flatten/unflatten for nested data.

Free download: sign in to any DEV3 account and click Download ZIP. Try it live: https://dev3.tech/tools/csv-json-converter 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

• RFC 4180 parser with quoted newlines and escaped quotes
• Delimiter auto-detection (comma, semicolon, tab, pipe)
• Dot and index paths (a.b, tags[0]) to nested JSON and back
• Union-of-keys header when exporting uneven records

Tech stack

React 19, TypeScript, Vite, Tailwind CSS 4.

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.