Free tools
Free tools
A handful of free, no-signup tools I use day to day — check a website, a domain or a password. Nothing is stored.
Website security check
TLS, headers, email security & an overall score.
→DNS lookup
A, AAAA, MX, TXT, NS and CAA records.
→Email deliverability
SPF, DMARC & DKIM — is your mail set up right?
→Domain / WHOIS
Registrar, creation and expiry dates.
→Speed snapshot
TTFB, page weight and compression.
→Subnet calculator
Work out ranges, masks and host counts.
→Password breach check
See if a password has leaked — privately.
→QR code generator
Turn a link or text into a QR code.
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