API Request Builder
Developer ToolsSend API requests and copy cURL or fetch code
FreePrivateInstant
Method
URL
Headers — one per line (Name: value)
Add a file · .txt .md .csv .json … · up to 2.00 MB
The request is sent straight from your browser, so the API must allow CORS. Do not put secret keys of production systems here.
cURL
curl -X GET 'https://jsonplaceholder.typicode.com/posts/1' \ -H 'Accept: application/json'
JavaScript fetch
const res = await fetch("https://jsonplaceholder.typicode.com/posts/1", {
"method": "GET",
"headers": {
"Accept": "application/json"
}
});
const data = await res.json();Similar tools you may like
History
All history →API Request Builder — at a glance
Send API requests and copy cURL or fetch code.
POST /posts
{ "title": "hello" }
Send
201 Created
Response JSON
cURL + fetch code
How to use it — step by step
Just your input — nothing to install or sign up for.
1
Enter the request
Pick GET, POST or another method and type the URL.
2
Add headers and body
One header per line. Add a JSON body for POST, PUT and PATCH.
3
Press Send
The request is sent from your browser.
4
Copy the code
Use the generated cURL or fetch snippet in your project.
Pro tips
Small things that make the result better.
✦If it fails with a network error, the API probably blocks browser requests (CORS) — use the CORS Tester to check.
✦Do not paste production secrets.
Quick facts
Freeno signup, no limit
Instantresult in a moment
Privatenothing is uploaded
Any devicephone, tablet or PC
Frequently Asked Questions
Is my data safe?+
Yes. Everything runs inside your own browser. Your text, files and images are never uploaded to any server.
Is this tool really free?+
Yes — completely free, no signup, no watermark and no usage limit.
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