Network

Queries A, AAAA, CNAME, MX, TXT, NS, SOA, SRV, CAA and PTR records over DoH, with TTL and the DNSSEC bit shown, from Cloudflare or Google.

Fetches a URL and shows the full response headers, redirect chain, timings and compression used.

Composes and sends a GET/POST/PUT/PATCH/DELETE/HEAD request with custom headers and a body, and shows the status, headers, body and timing — without ever forwarding cookies or Authorization.

Shows your public IP or any address with its reverse name, ASN, announcing network, prefix and registry country from Team Cymru’s DNS data — no city-level geolocation.

Shows your public IP, its network and everything this tab reveals — browser, screen, language, time zone, connection — and names what a website genuinely cannot see, starting with your MAC address.

Reads QR codes and common barcodes from an uploaded image, a screenshot or the camera.

Makes a QR for a URL, text, wifi, vCard or payment string, with error correction, logo and SVG export.

Connects to a host, shows the served chain, expiry, protocol and cipher support, and flags chain gaps.

Generates EAN-13, UPC, Code128, Code39 and ITF barcodes with check digits and print-ready output.

Extracts up to 100 links from a page, or takes a pasted list, and checks each in parallel — status, redirect target and response time, HEAD first and GET when refused.

Queries the same record from public DoH resolvers — Google, Cloudflare, Quad9, OpenDNS, AdGuard, NextDNS, Mullvad, DNS.SB, AliDNS — and shows which still hold the old answer.

Parses raw email headers into a delivery timeline with per-hop delays, reads the receiving server’s SPF, DKIM and DMARC verdicts, and flags From/Reply-To/Return-Path mismatches.

Reads Open Graph and Twitter card tags from a URL and renders how the link will look when shared.

Checks a domain’s MX, SPF, DKIM and DMARC records together and explains why mail would be rejected.

Tests whether a single TCP port on a host you specify accepts connections, and reports the banner.

Follows a shortened or tracking URL through every redirect and shows the final destination.

Expands a CIDR block into network, broadcast, usable range and host count, for IPv4 and IPv6.

Splits a URL into its parts, shows query parameters as an editable table and rebuilds the result.

Shows domain registration, registrar, nameservers and expiry, plus RDAP data where it exists.

Generates a certificate signing request and its private key from subject fields and SAN entries.

Identifies the hardware vendor from a MAC address OUI prefix and normalises the address format.

Converts internationalised domain names to and from punycode and warns about lookalike characters.

Fetches robots.txt and the sitemap, tests whether a URL is crawlable and validates the sitemap format.

Builds valid SPF and DMARC TXT records from a guided form and explains each mechanism it emits.

Opens a WebSocket connection, sends frames you compose and logs everything received with timings.