praneeth@website:~$ ls /bin/

Audit an existing DMARC record against RFC 9989 (DMARCbis), or build one from scratch with a guided wizard. Runs entirely in your browser.

Break down an IPv4 or IPv6 network — mask, wildcard, range, broadcast, host count — with a ruler showing where the prefix cuts the address and a plain answer to what the address is for. Then divide it into subnets, or check two blocks for overlap.

Build a QR code and get proof it scans: decoded back from its own pixels, then stress-tested at your print size, blurred, dimmed, tilted and under glare. Tells you how many millimetres wide it has to be, and what a logo is costing you.

Enter a domain and get a graded report on its email and DNS security: SPF with the 10-lookup count, DKIM key strength, DMARC, MX, MTA-STS, TLS-RPT, DANE, DNSSEC and CAA — and what to fix first, with the records to paste.

Paste a certificate, SSH key, cipher suite or algorithm name and see what a quantum computer does to it — with the NIST replacement, the ASD ISM target parameter, and a harvest-now, decrypt-later risk check.

Paste an email's headers and see what the receiving server decided — DMARC, SPF and DKIM with alignment explained, the route hop by hop, each DKIM signature's tags checked, and Microsoft 365's verdict decoded.