API Tools
ArrayKit's API tools help developers build, inspect and debug HTTP requests without leaving the browser. Whether you are wiring up a frontend call, reading an unfamiliar endpoint, or untangling a long query string, these utilities turn fiddly request work into a couple of clicks. cURL to Fetch rewrites a copied curl command as a clean JavaScript fetch() call, ready to paste into your code. URL Parser breaks any URL into its protocol, host, path and query parts and lists every parameter so you can spot what an endpoint actually receives. They are built for frontend and backend engineers, QA testers and anyone integrating with an API. Everything runs entirely in your browser: requests and URLs are processed locally, nothing is uploaded to a server, so even internal endpoints and tokens stay on your machine.
- cURL to Fetch — Convert a curl command to a JavaScript fetch() call.
- URL Parser — Break a URL into its parts and list query parameters.
- API Request Client — Send HTTP requests, build headers and params, inspect responses — your last 25 requests are saved locally.
- URL Builder & UTM Generator — Construct and validate fully encoded production URLs with standard analytics query flags (UTM) or custom query arrays.
- OpenAI API Tester — Build, run and copy OpenAI Chat Completions API requests as cURL, Python and JavaScript.
- Anthropic Claude API Tester — Build, run and copy Anthropic Claude Messages API requests as cURL, Python and JavaScript.
- Google Gemini API Tester — Build, run and copy Google Gemini generateContent API requests as cURL, Python and JavaScript.
- Replicate API Tester — Build, run and copy Replicate prediction API requests as cURL, Python and JavaScript.
- Hugging Face API Tester — Build, run and copy Hugging Face Inference API requests as cURL, Python and JavaScript.
Frequently asked questions
- What can I do with these API Tools?
- You can convert a curl command into a JavaScript fetch() call with cURL to Fetch, and break any URL into its protocol, host, path and query parameters with URL Parser. Together they speed up building and debugging HTTP requests.
- Are these API Tools safe to use with private endpoints and tokens?
- Yes. Every tool runs entirely in your browser, so the curl commands, URLs, headers and tokens you paste are processed locally. Your data never leaves your device and nothing is uploaded to a server.
- Do the API Tools work offline?
- Once the page has loaded, the tools run client-side, so converting a curl command or parsing a URL keeps working even if your connection drops. They transform text locally and do not send your requests anywhere.
- Does cURL to Fetch send my request when I convert it?
- No. It only translates the curl syntax into equivalent fetch() code as text. It never executes the request or contacts the target server, so the conversion is purely local and safe to run on any command.
- Can URL Parser handle query strings and encoded parameters?
- Yes. URL Parser splits a URL into its components and lists each query parameter as a key and value, making it easy to read long or encoded query strings and confirm exactly what an endpoint receives.