7 Best Free Developer Debugging and Code Analysis Tools

The local-first digital Swiss Army knife for analyzing, converting, and transforming data formats through simple drag-and-drop recipes.

Real-time regex tester with explanation, debugger, and community library.

Open-source API development ecosystem that runs entirely in your browser.

Instantly generate a unique URL to inspect, test, and debug webhooks and HTTP requests.

Free SSL/TLS configuration testing tool that grades your server security and identifies vulnerabilities.

Visualizes JSON, YAML, XML, and CSV data as interactive node graphs for easier exploration.

Collection of code transformation utilities — convert JSON to TypeScript, SVG to JSX, CSS to Tailwind, and more.