API Request Builder

Turn a JSON description of a request into both a fetch() call and a cURL command.

100% Free
No account required
Runs in your browser
No data is uploaded

Remember work on this deviceNot saved automatically

Private to this browser, not a cloud backup. Saves expire 7 days after the last save. Avoid saving sensitive data on shared devices.

Input

Paste or edit your request JSON, then click “Run tool”.

Type, paste or drop a file

JSON

{"method":"POST","url":"https://api.example.com/users","headers":{"content-type":"application/json"},"body":{"name":"Asha"}}

Ln 1, Col 1Spaces: 2UTF-8124 bytes

Output

fetch() and cURL (read-only).

Read-only

JSON

Ln 1, Col 1Spaces: 2UTF-80 bytes

Ready when you arePaste your input, then press Run tool or ⌘ ↵

Why use this tool?

Describe a request once and get both a fetch() call for code and a cURL command for the terminal.

fetch() and cURL together
Headers and JSON body
Shell-safe quoting
Rejects unsafe methods and URLs

{
  "method": "POST",
  "url": "https://api.example.com/users",
  "headers": {
    "content-type": "application/json"
  },
  "body": {
    "name": "Asha"
  }
}

Common use cases

Add requests to code
Try an endpoint quickly
Document API examples
Share a failing request

API Request Builder

Saved API Request Builder workspaces

Input

Output

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