Free Online Web Tools
16 toolsInspect domains, DNS records, redirects, certificates, and HTTP responses.
- WHOIS Domain LookupGet detailed domain registration and ownership info
- IP Address LookupGet location, ISP, and other IP information
- URL Encoder/DecoderEncode and decode URL parameters and strings
- User-Agent ParserParse and analyze browser user-agent strings
- HTTP Status CheckerCheck HTTP status codes, response times, and headers
- DNS LookupQuery DNS records including A, AAAA, MX, TXT, NS, CNAME
- SSL Certificate CheckerCheck SSL certificate validity and security details
- Redirect CheckerTrace URL redirect chains and analyze redirect types
- HTTP Headers ViewerInspect HTTP response headers including security and CORS
- Website ScreenshotCapture full-page or viewport screenshots of any website
- Subdomain FinderFind the subdomains of any domain and see which are still live and where they point
- What Is My IP AddressSee your public IPv4 and IPv6 address, internet provider and approximate location
- MAC Address LookupFind the manufacturer of any MAC address, one or hundreds at a time, and spot private addresses
- Is It DownCheck whether a website is down for everyone or just for you, with status code and response time
- SPF, DKIM & DMARC CheckerCheck a domain's email authentication: SPF, DKIM and DMARC records, with fixes for what is missing
- Internet Speed TestTest your download and upload speed, ping and jitter, and see what your connection can handle
Inspect domains and website responses
Check DNS records, redirects, HTTP headers, certificate information, and other details behind a website address. Different checks answer different questions: a DNS lookup describes name resolution, while an HTTP status check describes a server response. Results reflect the request and the moment of the check.
Follow a website request step by step
Start with DNS Lookup if a domain does not resolve, Redirect Checker if the address changes, and HTTP Headers Viewer when response metadata matters. Recheck after configuration changes have had time to take effect.
Common questions
Does an HTTP 200 response prove a website works correctly?
It only indicates a successful response to that request. Page content, scripts, forms, and access for other visitors still need separate checks.
Why do DNS results differ after I change a domain record?
Resolvers can retain cached records until their TTL expires. DNS Lookup shows the records available to that check; it does not prove every resolver has already received an update.
How do I find where a shortened or redirected link ends up?
Redirect Checker follows the redirect chain so you can inspect intermediate steps and the final address. Review the destination before sharing the link.
Can I inspect a certificate without checking the whole website?
SSL Checker focuses on certificate details. That is separate from checking page content, redirects, or HTTP headers, and a valid certificate alone does not establish that a site is trustworthy.