A lightweight Next.js web application that provides a collection of useful conversion tools for developers and designers. The app includes:
- QR Code Reader & Generator
- JSON Beautifier
- CSS unit converters (PX ↔ REM, EM, VW)
- Color converter (RGB ↔ HEX)
- URL Encoder / Decoder
- Barcode Reader
- Additional utilities such as percentage‑to‑PX conversion
The project is built with React, Tailwind CSS, and TypeScript, and is deployed on Vercel.
First, run the development server:
npm run dev
# or
yarn dev
# or
pnpm dev
# or
bun devOpen http://localhost:3000 with your browser to see the result.
You can start editing the page by modifying app/page.tsx. The page auto-updates as you edit the file.
This project uses next/font to automatically optimize and load Geist, a new font family for Vercel.
To learn more about Next.js, take a look at the following resources:
- Next.js Documentation - learn about Next.js features and API.
- Learn Next.js - an interactive Next.js tutorial.
You can check out the Next.js GitHub repository - your feedback and contributions are welcome!
We have upgraded to Next.js 15.4.8 to address CVE‑2025‑66478, a critical remote code execution vulnerability in the React Server Components protocol. Please ensure you keep dependencies up‑to‑date.
The easiest way to deploy your Next.js app is to use the Vercel Platform from the creators of Next.js.
Check out our Next.js deployment documentation for more details.