Why do I get a CORS error when sending a request?

CORS is a browser security policy. When the target server doesn't explicitly allow requests from metool.online, the browser blocks the response. Fix: copy the cURL snippet from the Code panel and run it in your terminal, or add Access-Control-Allow-Origin headers to your server.

Can I test a localhost service?

Not directly — browsers block requests from HTTPS pages (metool.online) to HTTP localhost. Use the generated cURL command in your local terminal instead.

Is the generated code ready to use?

Yes. Code is generated in real time from your Method, URL, Headers, and Body. Copy and run it directly — cURL in your terminal, or paste fetch/axios/Python/Go into your project.

Online HTTP Client & Build Requests, Generate Code & Test APIs

HTTP request workbench: compose requests, generate multi-language code snippets, send directly and inspect responses.

Demo mode: a sample POST request is pre-filled on the left, and code is generated live on the right. Edit anything to start using for real.

None JSON Form Raw

JSON Body

Hit Send to see the response here

curl -X POST "https://jsonplaceholder.typicode.com/posts" \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer your-token-here" \
  -d '{
  "title": "Hello from MeTool",
  "body": "Building HTTP requests is easy",
  "userId": 1
}'

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Frequently Asked Questions

: CORS is a browser security policy. When the target server doesn't explicitly allow requests from metool.online, the browser blocks the response. Fix: copy the cURL snippet from the Code panel and run it in your terminal, or add Access-Control-Allow-Origin headers to your server.
: Not directly — browsers block requests from HTTPS pages (metool.online) to HTTP localhost. Use the generated cURL command in your local terminal instead.
: Yes. Code is generated in real time from your Method, URL, Headers, and Body. Copy and run it directly — cURL in your terminal, or paste fetch/axios/Python/Go into your project.