cURL to fetch Converter

cURL is the universal HTTP client for terminals, and fetch is the universal HTTP client for browsers and modern Node. Copying a curl command from API docs or DevTools and translating it into fetch by hand is tedious — you have to re-quote the URL, rebuild a headers object, JSON-stringify the body, and remember to set the method.

This converter parses curl arguments the same way a POSIX shell would: backslash-newline continuations are stripped, quoted strings are respected, and `-H`, `-d`/`--data`, `--data-raw`, `--data-urlencode`, `-X`, `-u`, and `--cookie` flags are extracted. The URL is the last non-flag positional argument. If a body is present and no explicit method was set, POST is inferred.

JSON bodies are detected by looking at Content-Type or by trying `JSON.parse` on the raw body. When detected, the output uses `JSON.stringify` to keep the source readable. Form-encoded bodies become URLSearchParams. Basic-auth `-u user:pass` is converted into an `Authorization: Basic ...` header using `btoa`. Unknown flags are silently ignored so paste-from-Chrome-devtools works even when flags like `--compressed` are present.