curl-to-json-parser

Convert a multiline curl command string into a structured, parsable JSON object. Also ships with a tiny CLI.

• No HTTP execution — pure parsing only
• Supports common curl flags: -X/--request, -H/--header, -d/--data*, -G/--get, -F/--form, -u/--user, --url, -A/--user-agent, --referer, --compressed, -k/--insecure, -L/--location, -I/--head, -b/--cookie
• Dual ESM/CJS build, TypeScript types included

Install

npm install curl-to-json-parser

API

import { parseCurlToJson } from 'curl-to-json-parser';

const input = `curl https://api.example.com/users \
  -H \"Accept: application/json\" -G -d \"page=2\"`;

const result = parseCurlToJson(input);
console.log(result);

Output shape (simplified):

interface CurlJson {
  method: string;
  url: string; // rebuilt with query
  headers: Record<string, string>;
  query: Record<string, string | string[]>;
  cookies: Record<string, string>;
  body?: string;
  json?: any; // if JSON body detected
  form?: Record<string, string>; // if x-www-form-urlencoded detected
  multipart?: { name: string; value?: string; filename?: string; contentType?: string }[];
  auth?: { user: string; password?: string };
  compressed?: boolean;
  insecure?: boolean;
  followRedirects?: boolean;
  referer?: string;
  userAgent?: string;
}

CLI

You can also use the CLI to parse a curl string and print JSON.

npx curl-to-json-parser "curl https://api.example.com/users -H \"Accept: application/json\""

Or pipe:

echo curl https://api.example.com/search -G -d "q=hello world" | npx curl-to-json-parser