About koducat
koducat is a free online platform with a growing collection of developer tools: formatters, validators, encoders, converters, generators and an API tester. Our goal is simple — give developers, QA engineers, DevOps engineers and students fast, reliable utilities that work directly in the browser.
- Working tools
- 43
- Categories
- 9
- No paywall or sign-up
- Free
- Processing for most tools
- Local
Our approach
- Your data stays with you. Almost every tool processes input locally using JavaScript and the Web Crypto API. The only tool that makes network requests on your behalf is the API Tester, and only when you click Send.
- Free, without strings. No account, subscription or usage quota. The site is funded by advertising that is kept separate from the tools.
- Honest tools. Each tool documents its limitations. We would rather tell you a JWT decoder does not verify signatures than let you assume it does.
- Fast pages. Each tool page loads only the code that tool needs.
What you'll find here
Tools are organised into 9 categories: JSON Tools, API Tools, Code Converters, DevOps Tools, Security Tools, Database Tools, Web Tools, AI Tools and Utility Tools. You can browse everything in the tool directory or read our step-by-step guides.
Get in touch
Have an idea for a tool or found a bug? Contact us — suggestions directly shape what we build next.