regex101 for the terminal — real-time matching, 3 engines, capture groups, replace mode, syntax highlighting, plain-English explanations, undo/redo, mouse support. Written in Rust.

Shiny Application to test regular expressions in R

Regular Expression (Regex) tool that assist in creating and testing expressions.

DevTools Hub 是一个简洁高效的前端开发工具集合，助力开发者提升效率、优化工作流。 ✨ 主要特性： 一站式工具集，涵盖常用前端调试、格式化、转换等功能 极简 UI，开箱即用，无需复杂配置 纯前端实现，安全可靠，支持本地离线使用 持续更新，社区驱动，欢迎贡献你的创意 无论你是前端新手还是资深工程师，DevTools Hub 都能成为你的开发利器。

ToolPipe - 50+ Free Developer Tools & 70+ REST APIs

Free, open-source developer utilities that run entirely in your browser. 700+ tools across 34 categories.

9-in-1 browser-based developer toolkit. Single HTML file. No dependencies.

Free online developer tools: JSON formatter, image compressor, PDF merger, base64 encoder, regex tester & 100+ more. No login required. All processing in browser.

A fast, free JS & TS playground — runs entirely in your browser with instant execution, npm imports, and code export

A simple application to test your regex

52 free developer tools for JSON, TypeScript, Zod, regex testing, color conversion, and more. 100% client-side, no sign-up, privacy-focused.

Free privacy-first developer tools & blog: JSON formatter, PDF tools, Base64, RegEx tester, Hash generator, URL encoder, Markdown converter, Color picker. All client-side processing.

Pocket toolkit for developers

11+ free browser-based developer tools — JSON formatter, regex tester, CSS generators, JWT decoder, hash generator & more. No signup, no ads, 100% client-side.

Free, fast, and private developer tools. No ads, no tracking. 12 tools: JSON Formatter, Regex Tester, Color Converter, and more.

A regular expression testor like the rubular website

A clean and modern RegEx playground built with Next.js 14, TypeScript, Tailwind CSS, and shadcn/ui. Test, debug, highlight, and understand regular expressions with an intuitive UI, real-time matching, pattern library, and token-by-token regex explanations.

A self-hosted, privacy-first developer toolkit. JSON formatter, diff checker, Base64 codec, code beautifier, regex tester, URL codec, JWT decoder, and color converter — all running 100% client-side. No tracking, no cookies, no server calls, no logging

A modern web application for testing and building regular expressions with real-time preview

20+ free online developer tools. JSON formatter, Base64, UUID generator, hash generator, JWT decoder, regex tester, and more. No signup, no tracking.