cURL Builder
Build curl commands from method, URL, headers, and body.
- Browser-based
- No signup
Developer
Processed using an external service
Enter a URL to send a browser request and list response status and headers exposed by CORS. Some sites block cross-origin header inspection.
Results are based on the inputs you provide and may not cover every edge case. This tool is for general use and is not professional advice.
1. Enter the domain, IP, ZIP code, or URL requested by HTTP Header Checker. 2. Click the lookup or check button. 3. Wait for the external service response. 4. Review the formatted results table or details. 5. Copy values you need—do not query sensitive internal hosts. This tool calls an external service—see the privacy note for what is sent.
Example: paste a small sample input into HTTP Header Checker, run the transform or validation, and compare the output with the before text—fix any syntax errors reported before copying.
Enter a URL to send a HEAD request from your browser and list response headers. Some sites block cross-origin requests, so results may be limited by CORS.
Results are based on the inputs you provide and may not cover every edge case. This tool is for general use and is not professional advice.
This tool sends data to an external service for processing. See the tool details below for what is transmitted.
Yes. Utilnivo tools are free to use and do not require an account.
Utilnivo does not require an account. See the privacy note on this page for how your data is processed for this tool.
Open the tool on this page, enter your inputs, and use the on-screen controls. No account is required.
Build curl commands from method, URL, headers, and body.
Check certificate transparency records for a domain.
Look up DNS records for a domain.
Format, minify, and validate JSON with optional key sorting.
Compare two JSON documents and list structural differences.
Format, minify, and validate XML with readable indentation.
Page last reviewed:
Enter a URL to inspect HTTP response headers.