DevTools – 50+ developer tools AIO

JSON, Regex, JWT, Markdown and more — all in one toolbox

Visit site ↗Alternativestop 22% of March 2026

What it does

DevTools is a free browser-based toolbox for everyday developer tasks. Format JSON, test regex, decode JWT, generate UUID, preview Markdown or Mermaid, visualize SQL schemas, and more. Everything runs locally in your browser. No login. No data collection.

Does the same job

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