Free Online Developer Tools
Format JSON, decode JWTs, test regex, encode Base64, generate hashes, minify code, and debug APIs with free browser-based developer tools.
Best tools for frontend developers, backend engineers, QA teams, and technical writers
UtilityTools is built for users who need fast, focused results without switching between dozens of websites. The platform includes 1,400+ free online tools across PDF, image, AI, developer, finance, marketing, government exam, student, and productivity workflows.
These recommendations are selected for practical daily use, clear output, mobile-friendly controls, and privacy-conscious processing. Most tools work instantly with no signup, and related workflows are linked so you can move from one task to the next without searching again.
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FAQs
Do developer tools run locally?
Many formatting and encoding tools run in the browser. Network tools may call the backend for checks.
Can I paste API payloads?
Yes, but avoid secrets or production tokens unless your policy allows it.
Are these tools good for daily debugging?
Yes. They are optimized for fast, repeat developer workflows.