Free tools · no signup · nothing logged
IT Ops Tools
Browser-based utilities for the checks IT pros run every day. Everything executes client-side against public APIs (Cloudflare DNS-over-HTTPS, registry RDAP); nothing you enter is stored, logged, or sent to this server.
Email Security Checker
SPF, DMARC, DKIM (33-selector discovery), MX, BIMI, MTA-STS, and TLS-RPT with plain-language fixes.
DNS Lookup
Query any record type: A, AAAA, CNAME, MX, TXT, NS, SOA, SRV, CAA, PTR, and DNSSEC records.
WHOIS / RDAP Lookup
Domain registration and IP ownership data via RDAP, the structured successor to WHOIS.
Internet Speed Test
Download, upload, latency, jitter, and packet loss against Cloudflare's edge, using their open-source engine.
Email Header Analyzer
Paste raw headers: hop-by-hop delivery path with delays, authentication results, and spoofing red flags.
SPF Record Generator
Build a correct SPF record from your senders, with the 10-lookup limit counted for you.
DMARC Record Generator
Build a DMARC record with sane policy progression, reporting addresses, and alignment options.
Subnet Calculator
IPv4 network, broadcast, usable range, host count, and wildcard mask from any IP/CIDR.
IP Location Lookup
Geolocation, ISP, ASN, and timezone for any IP address, with a map and honest accuracy caveats.
What's My IP
Your public IP and connection details, served by this site's own edge. Nothing logged.