Free tools

Free cURL to Fetch/Axios Converter

Turn terminal cURL commands into JavaScript fetch or axios code snippets for frontend and backend integrations.

Copy-paste outputs

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Tool 01

cURL to Fetch / Axios Converter

Convert cURL commands into browser and Node-friendly JavaScript request snippets.

cURL to Fetch / Axios Converter

Paste a cURL command and generate deterministic JavaScript request snippets.

cURL command

Parsed request

{
  "method": "POST",
  "url": "https://api.example.com/v1/leads",
  "headers": {
    "Content-Type": "application/json",
    "Authorization": "Bearer sk_test_123"
  },
  "body": "{\"email\":\"team@example.com\"}",
  "warnings": []
}

Fetch snippet

const response = await fetch("https://api.example.com/v1/leads", {
  "method": "POST",
  "headers": {
    "Content-Type": "application/json",
    "Authorization": "Bearer sk_test_123"
  },
  "body": "{\"email\":\"team@example.com\"}"
})

if (!response.ok) {
  throw new Error(`Request failed: ${response.status}`)
}

const data = await response.json()
console.log(data)

Axios snippet

import axios from 'axios'

const response = await axios({
  "method": "post",
  "url": "https://api.example.com/v1/leads",
  "headers": {
    "Content-Type": "application/json",
    "Authorization": "Bearer sk_test_123"
  },
  "data": "{\"email\":\"team@example.com\"}"
})
console.log(response.data)

How it works

cURL to Fetch / Axios Converter: methodology and worked example

How this tool computes its result

A regex-based tokenizer splits the pasted cURL command into shell-style tokens (respecting single/double quotes and backslash escapes), then a token walker recognizes -X/--request, -H/--header (split on the first colon), -d/--data/--data-raw/--data-binary/--data-urlencode (joined together with '&'), -u/--user (base64-encoded into an Authorization: Basic header), --url/--uri, -I/--head (forces method to HEAD), and any bare token matching /^https?:\/\//i as the request URL. If a body was captured and the method is still the default GET, the method is auto-upgraded to POST. The parsed {method, url, headers, body} structure is then rendered into equivalent fetch() and axios() JavaScript snippets.

Worked example

The tool's own default input — curl -X POST https://api.example.com/v1/leads -H 'Content-Type: application/json' -H 'Authorization: Bearer sk_test_123' -d '{"email":"team@example.com"}' — parses to method=POST, url=https://api.example.com/v1/leads, headers with Content-Type and Authorization set, and body='{"email":"team@example.com"}'. The generated fetch snippet passes method, headers, and body as the second argument to fetch(), then checks response.ok before parsing JSON.

When not to use this tool

Multiple -d flags are joined naively with '&', which is correct for form-encoded request bodies but corrupts a JSON body that was (unusually but validly) split across multiple -d flags — the parser makes no attempt to detect or merge JSON fragments.

Common mistakes

- Pasting a cURL command that uses -F/--form for multipart file uploads — this flag is not recognized at all, so any multipart form data is silently dropped from the parsed result.
- Expecting --data-urlencode to actually URL-encode its value — the parser appends the raw value to the body as-is; no encoding is performed.
- Using a bare domain without a scheme (e.g. 'api.example.com/v1/leads' instead of 'https://api.example.com/v1/leads') — the URL detector only matches tokens starting with http:// or https://, so a schemeless URL is never picked up.

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