DEV3 Free HTML Entity Encoder and Decoder — Source Code (React + Tailwind)

Source code of the DEV3 HTML Entity Encoder and Decoder, an HTML entity encoder and decoder with named, decimal and hex styles and a table of common entities.

Free download: sign in to any DEV3 account and click Download ZIP. Try it live: https://dev3.tech/tools/html-entity-encoder-decoder 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

• Latin-1 plus typographic, arrow, maths and Greek names
• Scope control: special only, non-ASCII or everything
• Numeric references validated against Unicode ranges
• Unknown names left untouched when decoding

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.