Tool catalog

Growing

Focused networking utilities with clear limits, private-by-default inputs, and no advertising detours.

IP tools

IP lookupGeolocation, ASN, and abuse contacts for any address. Open My IP detailsEverything we can see about your connection. Open CIDR calculatorSubnets, masks, ranges, and host counts. Open CGNAT detectorFind out if your ISP shares your address. Open

DNS tools

DNS lookupCommon record types through a bounded public resolver. Open Propagation checkerCompare independent global resolver perspectives. Open Reverse DNSPTR and forward-confirmation checks for IPv4 and IPv6. Open DNSSEC validatorChain-of-trust validation with failure detail. Open

Email tools

SPF checkerParse and expand SPF with lookup counting. Open DMARC analyzerPolicy, alignment, and report configuration. Open DKIM inspectorSelector key decoding and validation. Open Blacklist checkPublic IPv4 reputation across a curated DNSBL set. Open

Certificates

TLS inspectorChain, expiry, TLS 1.2/1.3, and negotiated ciphers. Open CSR decoderValidate and decode requests before submission. Open Expiry monitor24-hour in-app checks, alerts, and history. Open CT log searchCurrent unexpired issuances from a documented CT index. Open

Network utilities

Ping & latencyReachability, loss, and RTT from six world regions. Open TracerouteSanitized hop paths from three world regions. Open Port checkerIs that port actually open from outside? Open Speed testThroughput without the ad-covered nonsense. Open

Developer utilities

HTTP headersStatus, redirects, caching, and security headers. Open User agent parserBrowser, engine, OS, device, and bot clues. Open URL encoderLocal UTF-8 component and full-URL transforms. Open JWT decoderInspect claims locally without sending the token. Open