Developer
DNS Lookup
Resolve a hostname into IP addresses and inspect the canonical DNS name.
What Developer Toolkit helps you do
Developer Toolkit combines multiple web debugging checks into one workflow page so you can inspect a URL without bouncing between separate utilities.
The toolkit can parse the URL, resolve DNS, inspect the primary IP, fetch response headers and body preview, estimate response time, inspect SSL certificate metadata, and flag common security headers.
Standalone tools like DNS Lookup, HTTP Header Viewer, HTTP Status Lookup, IP Lookup, MIME Type Lookup, and User-Agent Parser still exist for focused tasks, while this page acts as the combined workflow hub.
Use the tool
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Frequently asked questions
Does this replace the standalone tools?
No. The existing standalone tools remain available and are linked from this page. The toolkit simply combines common checks into one workflow.
Does the toolkit fetch the live URL?
Yes. It performs a live request from the server to inspect DNS, HTTP response details, security headers, and SSL certificate metadata.
Can I use this to inspect API endpoints?
Yes. It is especially useful for API endpoints, JSON responses, content types, status codes, redirects, headers, and response timing.