About DevTools.day

DevTools.day is a free resource for web developers. We build browser-based developer tools and write in-depth technical articles about the frameworks, languages, and practices that matter in modern development.

Who's Behind This?

DevTools.day is built by Michael, a software engineer with 5+ years of experience building web applications with JavaScript, TypeScript, React, Node.js, and AWS. After spending years switching between dozens of online tools for encoding, formatting, and debugging, I decided to build one place with all the tools I use daily — fast, free, and without the clutter.

Why We Built This

Most developer tool sites are bloated with ads, require sign-ups, or run your data through a server. DevTools.day is different:

  • 100% client-side — Every tool runs entirely in your browser. Nothing is sent to a server.
  • No sign-up required — Open a tool and start using it immediately.
  • Fast and minimal — No JavaScript frameworks for simple tools. Vanilla JS, instant load.
  • Privacy-first — Your data stays on your machine. We don't log, store, or transmit anything.

Our Tools

We currently offer 17 free developer tools covering the most common needs:

  • Formatters & Validators — JSON Formatter, CSS Minifier, Markdown Preview
  • Encoders & Decoders — Base64, URL Encoder, HTML Encoder, JWT Decoder
  • Generators — UUID, Password, Lorem Ipsum, Hash
  • Converters — JSON↔YAML, Color, Timestamp, Case Converter
  • Testing — Regex Tester, Diff Checker

Our Articles

Beyond tools, we publish detailed technical articles on topics that web developers care about. Our articles aren't surface-level listicles — they're comprehensive guides with real code examples, benchmarks, and honest opinions. Topics include:

  • Framework comparisons (Next.js vs Astro, Bun vs Node)
  • Language features (TypeScript 5.5, Rust for JS devs)
  • DevOps & tooling (Docker, GitHub Actions, Git)
  • Performance optimization (Core Web Vitals, code splitting)
  • AI-assisted development (Copilot, Cursor, Cody)

How We Write Articles

  1. Hands-on testing — We use every tool and framework we write about in real projects.
  2. Code-first approach — Every claim is backed by actual code examples you can copy and use.
  3. Benchmarks when relevant — We run our own performance tests, not just quote marketing pages.
  4. Regular updates — When a new version ships, we update our articles to reflect the changes.

Tech Stack

DevTools.day itself is built with:

  • Astro — Static site generation with zero JavaScript by default
  • Vanilla JavaScript — Tools use plain JS for instant interactivity
  • AWS S3 + Cloudflare — Global CDN with edge caching

Get in Touch

Have a suggestion for a new tool or found a bug? We'd love to hear from you.

📧 Email: [email protected]
🐦 Twitter: @devtoolsday

Visit our Contact page to send us a message.

DevTools.day is a project by Malec Labs — an independent software studio building useful tools for the web.