> DNS/HTTP Tester

DNS/HTTP Tester

Retro network diagnostics

DNS lookup & propagation, HTTP headers, SSL certificates, Ping, Whois and a full domain audit — wrapped in a Windows-95 terminal. One tap, real answers, no account.

▶ Get it on Google Play

Android · iOS · Web • 16 languages • 2 themes • no trackers

Tools

DNS lookup

A / AAAA / MX / NS / TXT over DoH (Cloudflare, Google, Quad9…)

Propagation

Multi-resolver check + "is it down or just me?" verdict

HTTP headers

Status, CORS, security headers, compression, response time

SSL certificate

Issuer, validity & chain via Certificate Transparency

Fingerprint

CDN / WAF / server / framework detection from headers

Ping

Latency probe with Geiger-counter sonification

Whois + Geo

Registrar plus hosting country, city, ASN & org

Domain Audit

A–F health score, subdomain discovery, email security

Watchlist

Track domains over time & diff IP / status / cert changes

Screens

Domain health score screen — Health score

HTTP header & fingerprint screen — HTTP + fingerprint

Whois & hosting location screen — Whois + hosting

DNS propagation / downtime screen — Propagation

Under the hood

StackReact Native · Expo SDK 54 · TypeScript

TargetsAndroid · iOS · Web (one codebase)

NetworkingPure fetch — public DoH & CT APIs, no native modules

Nav / stateReact Navigation · AsyncStorage persistence

i18n16 languages, English fallback

Design2 themes · CRT effect · generated retro sounds