About Us

Founded in 2026, API Response Checker was built to solve a simple problem that every developer faces: existing API testing tools are either too complex, too slow, or require registration. We wanted something better - a tool that is fast, intuitive, and accessible to everyone without barriers.

Our platform provides instant, detailed API performance metrics including response time, DNS lookup, TTFB, TLS handshake time, and more - all wrapped in a beautiful, modern interface that developers love to use. Every metric is presented clearly with color-coded indicators and actionable insights.

What started as a simple side project quickly grew into a comprehensive suite of API tools. Today we offer API response checking, bulk endpoint testing, uptime monitoring, SSL certificate validation, DNS lookup, JSON formatting, JWT decoding, Base64 encoding, cURL generation, and a full reference library of HTTP status codes and headers.

Thousands of developers worldwide trust us to monitor and optimize their API performance. Our tools are used by solo developers, startups, and enterprise teams alike. We are completely free, require no registration, and are committed to staying that way. We believe that API performance testing should be a fundamental right for every developer, not a premium feature locked behind a paywall.

Our mission is to make the internet faster, one API at a time. By providing free, high-quality performance testing tools, we help developers build better, more reliable APIs that deliver exceptional user experiences. We are constantly improving our platform based on user feedback and the latest industry best practices.