Web Tools
Free utilities for web pros. DNS, Whois, IP, stack detection, and more.
DNS Lookup
A, AAAA, MX, TXT, CNAME, NS, SOA, CAA records for any domain.
Whois Lookup
Registrar, registration dates, name servers, expiration, raw whois output.
Email DNS Health
Check SPF, DKIM, DMARC, and MX. Spot deliverability problems before mail bounces.
What's My IP
Your public IP, browser, language, and request headers — handy for debugging.
Tech Stack Detector
What CMS, framework, CDN, analytics, and payment systems power any website.
SSL/TLS Inspector
Issuer, expiry, subject alt names, signature algorithm — for any HTTPS host.
JWT Decoder
Header, payload, expiry status. Decoded entirely client-side — token never leaves your browser.
SAML Decoder
Issuer, audience, NameID, attribute claims. Client-side decode of SAML responses.
OAuth 2.0 Tester
Authorization Code + PKCE flow against Google, GitHub, Microsoft, Slack, Discord, or any custom provider.
Webhook Listener
POST XML/JSON/anything to a unique URL and inspect every captured request live.
QR Code Generator
URL, text, email, phone, SMS, vCard, WiFi, and geo. Live preview, download as PNG.
QR Code Decoder
Drop in a QR image and read its contents — auto-detects URLs, vCards, WiFi configs.
vCard Builder
Build a contact card from a form. Download .vcf or grab the QR for a business card.