elefcode
← Back to tools

About elefcode

The story behind the tools.

What is elefcode?

elefcode is a free collection of more than 45 developer utilities that run entirely in your browser. It brings together the small tools developers reach for every day — formatters, converters, encoders, generators, and calculators — into one fast, consistent, ad-light workspace. There is nothing to install and no account to create: open a page and start working.

Why it exists

Most online developer tools have the same problems: they upload your data to a server you don't control, they're buried in intrusive pop-ups, or each one lives on a different site with a different interface. elefcode was built to fix that. Every tool follows the same clean design, works offline once loaded, and — most importantly — processes your data locally so that sensitive input like tokens, keys, and config files never leave your machine.

Privacy by design

elefcode has no backend and no database. Whatever you paste, type, upload, or generate is processed by JavaScript running on your own device. Encryption, hashing, image compression, and every other operation happen client-side using standard browser APIs such as the Web Crypto API and Canvas. Because we never receive your data, we have nothing to store, sell, or leak. You can read the specifics in our Privacy Policy.

What's inside

The toolset is organized into categories, including:

  • Format & Validate — JSON formatter, JSON→TypeScript, diff viewer, markdown preview, regex tester.
  • Security & Encoding — JWT decoder/builder, hash & HMAC generators, AES encryption, bcrypt, Base64, QR codes.
  • Dev Utilities — chmod calculator, slugify, string escaping, .env↔JSON, YAML↔JSON.
  • Text & Data — case converter, word counter, CSV tools, markdown tables, ASCII/Unicode lookup, text-to-speech.
  • Design & Visual — color converter, CSS gradient/shadow/radius generators, contrast checker, image compressor, favicon generator, Mermaid diagrams.

New tools are added regularly. Browse the full list on the home page.

How it's built

elefcode is a static site built with Next.js and React, exported as plain HTML and JavaScript and served over a global CDN. That's what makes it fast and lets every tool run without a server. The project is developed in the open — you can follow along or report issues on GitHub.

Get in touch

Have a tool idea, found a bug, or want to say hello? Head to our Contact page. Feedback is what shapes which tools get built next.