About DevTools

DevTools is a catalogue of single-purpose developer utilities — JSON formatters, hash generators, JWT decoders, regex testers, and over a hundred more. Every tool is free and works immediately, with no account required.

The privacy guarantee is simple: with the exception of a few clearly-labelled network tools, every utility runs 100% in your browser tab. Your data never leaves your computer. Open DevTools → Network while using any pure-client tool and you will see zero outbound requests for the core operation.

This matters because developers routinely paste sensitive information into online tools — API tokens, JWT secrets, private keys, production database contents, personal user data. In 2025, multiple popular online formatters were found to be logging user-submitted content server-side. DevTools is built from the ground up to make that impossible for its core tools.

How it works

DevTools is a statically-exported Next.js application deployed to Cloudflare Pages. There is no Node.js server at runtime. Each tool is a self-contained React component with a pure utility function. Heavy libraries (parsers, crypto implementations, code formatters) are code-split: they load only when you visit that tool's page, keeping the homepage and navigation shell tiny.

Fonts are self-hosted at build time via next/font. No Google Fonts CDN requests. No external analytics. No cookies.