Developer tools that actually help you build.
DevToolbox is a collection of modern, lightweight, and free tools to boost your productivity as a developer.
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Featured Tools
Everything you need, in one place.
Powerful tools for developers, made simple.
GitHub Profile Analyzer
PopularAnalyze any GitHub profile and discover insights about repositories, languages, activity, and developer personality.
AI Prompt Playground
Explore, search, and copy useful AI prompts for coding, debugging, learning, productivity, and more.
Markdown Previewer
Write and preview Markdown in real-time. Perfect for README and documentation.
JSON Formatter
Format, validate, and beautify your JSON data instantly.
Regex Tester
Test and debug your regular expressions with ease.
Developer Notes
Capture small engineering notes, snippets, and ideas.
No Login Required
Jump right in, no signup needed.
Frontend Only
Lightweight, fast, and secure.
Free Forever
All tools are 100% free to use.
Open Source
Built for the developer community.