cURL Command Generator Free Online Tool 2026

Last updated March 22, 2026

Bearer Token Authentication

curl https://api.example.com/profile \
  -H "Authorization: Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9..."

Basic Authentication

curl https://api.example.com/admin \
  -u "username:password"

# Or with explicit header
curl https://api.example.com/admin \
  -H "Authorization: Basic dXNlcm5hbWU6cGFzc3dvcmQ="

API Key in Header

curl https://api.example.com/data \
  -H "X-API-Key: your-api-key-here"

API Key as Query Parameter

curl "https://api.example.com/data?api_key=your-api-key-here"

Form Data (URL-encoded)

curl -X POST https://api.example.com/login \
  -H "Content-Type: application/x-www-form-urlencoded" \
  --data-urlencode "username=alice" \
  --data-urlencode "password=secret123"

Multipart Form Data (File Upload)

curl -X POST https://api.example.com/upload \
  -F "file=@/path/to/document.pdf" \
  -F "title=My Document" \
  -H "Authorization: Bearer token123"

Follow Redirects + Timeout

curl -L \
  --connect-timeout 10 \
  --max-time 30 \
  https://api.example.com/resource

Verbose Output for Debugging

curl -v https://api.example.com/users \
  -H "Authorization: Bearer token123"

Save Response to File

curl https://api.example.com/export/report.csv \
  -H "Authorization: Bearer token123" \
  -o report.csv

Disable SSL Verification (Dev Only)

curl -k https://localhost:8443/api/test \
  -H "Content-Type: application/json"

# WARNING: Never use -k in production — it disables certificate validation

OPTIONS Preflight Check

curl -X OPTIONS https://api.example.com/users \
  -H "Origin: https://myapp.com" \
  -H "Access-Control-Request-Method: POST" \
  -H "Access-Control-Request-Headers: Content-Type, Authorization" \
  -v

Common Use Cases

• Testing REST API endpoints during development
• Debugging authentication and header issues
• Automating HTTP requests in shell scripts
• Verifying API behavior before writing application code
• Generating curl commands for API documentation
• Testing file upload endpoints

Configure your request method, URL, headers, body, and authentication through the visual interface and get a ready-to-run curl command with an explanation of each flag used.

curl https://api.example.com/users

curl https://api.example.com/users \
  -H "Accept: application/json" \
  -H "X-API-Version: 2"

curl -X POST https://api.example.com/users \
  -H "Content-Type: application/json" \
  -d '{"name": "Alice", "email": "alice@example.com", "role": "admin"}'