API Error Decoder is a versatile Chrome add-on designed to help developers debug HTTP errors efficiently. With this tool, users can capture 4xx and 5xx errors, along with CORS and network failures, directly within Chrome DevTools. The add-on provides an intuitive interface that allows users to see failed requests automatically, eliminating the need for manual filtering and extensive console searches. Key features include instant diagnosis of errors, filtering by type, and toggling options for first-party requests, ensuring a seamless debugging experience.

The tool is available for free, offering essential features like capturing various error types and providing clear explanations for failures. For advanced users, a one-time payment unlocks pro features such as request replay, JWT token inspection, and session history tracking. API Error Decoder is ideal for frontend developers, full-stack engineers, and QA professionals seeking to streamline their debugging process without the hassle of account creation.