Web- & Netzwerk-Tools
Domains, Zertifikate und APIs in Sekunden prüfen.
Ping TestMeasure how fast a server responds: enter a host and get the round-trip latency, jitter and failed…Port CheckerTest whether a server accepts connections on specific ports — web (80/443), mail (25/587/993), SSH,…SPF, DKIM & DMARC CheckerFind out why emails land in spam. Enter a domain to check MX, SPF (including the 10-lookup limit), DKIM,…WHOIS LookupEnter a domain to see its registrar, creation and expiry dates, domain age, status codes, nameservers and…DNS Propagation CheckerChanged DNS or moved a site to Webflow? Check whether the new records are visible worldwide — answers from…What Is My IPYour public IP address and everything your browser reveals to the websites you visit — user agent, screen,…User Agent ParserDecode any User-Agent string into browser, engine, operating system and device — and find out whether it…DNS LookupQuery all common DNS record types for a domain in one go, with TTLs, sorted MX records and an SPF/DMARC…SSL CheckerVerify an HTTPS certificate in seconds — see when it expires, who issued it, which hostnames it covers and…Website Down CheckerFind out in seconds whether a website is down for everyone or just for you — with status code, response…API TesterA lightweight Postman alternative in your browser: build an HTTP request, send it and inspect status,…HTTP Status CodesEvery standard HTTP response code explained in plain English, with when to use it and how it affects SEO.…