Convert cURL to JavaScript (Fetch) Instantly

How to Convert cURL to JavaScript (Fetch)

This free tool instantly translates cURL bash commands into working JavaScript (Fetch) code using native HTTP libraries. When working with complex API requests, manually configuring the equivalents can take significant time and result in syntax errors. Our utility handles headers, payloads, query parameters, formatting, and authentication automatically to ensure you get completely functional code right out of the box.

Why Automated Conversion Matters

Modern APIs often require intricate authentication flows, custom headers, and multipart form data. Writing the boilerplate for these requests in JavaScript (Fetch) from a cURL command is repetitive and error-prone. By automating this process, developers can ensure that the underlying structure matches the official cURL specification while leveraging the idiomatic patterns of JavaScript (Fetch). This speed up integration cycles and reduces the debugging time associated with malformed network requests.

0ms Latency & Privacy-First Security

Data security is our top priority. Unlike other converters that send your cURL commands to a server, FmtDev processes every conversion 100% locally in your browser. This means sensitive information like bearer tokens, API keys, and proprietary endpoints never leave your machine. This "Zero-Server" architecture provides instant, 0ms latency responses while maintaining strict compliance with enterprise security standards.

How to Use

To get started, simply paste your cURL command into the editor above. The tool will automatically detect the components and generate the equivalent JavaScript (Fetch) implementation in real-time. You can then copy the generated code directly into your project. By relying on native implementations rather than external dependencies, you guarantee that integration patterns are clean, readable, and align perfectly with standard best practices.