About DevToolHQ

What this site is

DevToolHQ is a collection of 95+ free tools for developers, writers, and data engineers. JWT decoders, JSON formatters, base64 encoders, UUID generators, hash tools, regex testers, cron builders, epoch converters, and a long list of smaller utilities that save five minutes at a time. Every tool is free, every tool works without an account, and almost every tool runs entirely in your browser.

Why it exists

Most online dev tools ship your input to a server before giving you output. For a base64 string that is harmless. For a JWT, an API response, a customer record, or a piece of source code, it is not. DevToolHQ was built around a simple promise: if a tool can run locally, it should. The decoder, formatter, or regex match happens in JavaScript on your machine, and the value you pasted never touches a server, never hits a log, and never leaves your browser tab.

The handful of pages that do need a network call (API docs, contact form) say so explicitly and use well-known providers. Everything else is static HTML and a client bundle.

Who built it

DevToolHQ is built and maintained by Aniket Nigam, a solo developer from India. The stack is Next.js on Vercel, TypeScript, Tailwind, and a short list of tiny libraries per tool. There is no team, no VC funding, and no data team monetizing your input. It is a side project that took on a life of its own.

What is next

The public roadmap is rough but honest:

• More tools, focused on gaps in the existing catalog: protobuf decoder, mermaid renderer, OpenAPI diff.
• Better cheatsheets and reference pages around the heavier tools (regex, cron, JWT).
• An optional Pro tier for API access, bulk processing, and an ad-free experience. Tools themselves stay free.
• A small set of native-feeling keyboard flows so the most-used tools open in under two seconds.

Popular tools

• JWT Decoder
• JSON Formatter
• Base64 Encode / Decode
• UUID Generator
• Regex Tester
• Cron Builder

Feedback

If a tool is missing, broken, or slow, tell me. The inbox ishello@devtoolhq.comand every message is read by the person who writes the code. The contact page has a form if email is not your style.