Web Tools

$ dig domain.com

DNS Lookup

A, AAAA, MX, TXT, CNAME, NS, SOA, CAA records for any domain.

$ whois domain.com

Whois Lookup

Registrar, registration dates, name servers, expiration, raw whois output.

$ mail-auth domain.com

Email DNS Health

Check SPF, DKIM, DMARC, and MX. Spot deliverability problems before mail bounces.

$ curl ifconfig.me

What's My IP

Your public IP, browser, language, and request headers — handy for debugging.

$ built-with url

Tech Stack Detector

What CMS, framework, CDN, analytics, and payment systems power any website.

$ openssl s_client

SSL/TLS Inspector

Issuer, expiry, subject alt names, signature algorithm — for any HTTPS host.

$ jwt decode

JWT Decoder

Header, payload, expiry status. Decoded entirely client-side — token never leaves your browser.

$ saml decode

SAML Decoder

Issuer, audience, NameID, attribute claims. Client-side decode of SAML responses.

$ oauth-debug

OAuth 2.0 Tester

Authorization Code + PKCE flow against Google, GitHub, Microsoft, Slack, Discord, or any custom provider.

$ nc -l 8080

Webhook Listener

POST XML/JSON/anything to a unique URL and inspect every captured request live.

$ qr generate

QR Code Generator

URL, text, email, phone, SMS, vCard, WiFi, and geo. Live preview, download as PNG.

$ qr decode

QR Code Decoder

Drop in a QR image and read its contents — auto-detects URLs, vCards, WiFi configs.

$ vcard build

vCard Builder

Build a contact card from a form. Download .vcf or grab the QR for a business card.