Simple tools. Fast. Accurate.

• What’s my IP IPv4/IPv6, user agent, timezone
• Internet speed test Latency, download, upload
• System info CPU threads, RAM estimate, GPU renderer (WebGL)
• DNS lookup A/AAAA/MX/TXT/CNAME/NS via DNS-over-HTTPS
• WebRTC leak test Check what IPs WebRTC can expose (VPN troubleshooting)
• Browser benchmark JS compute + DOM + JSON + canvas (quick smoke test)
• VAT calculator (UK) Add VAT or remove VAT from a price (standard/reduced/zero/custom)
• Mortgage calculator Monthly payment, total interest, overpayment impact + chart
• Stamp Duty (SDLT) calculator England & NI residential SDLT estimate, breakdown by band
• Take-home pay (UK) Estimate weekly/monthly/yearly net pay (tax + NI + pension)
• Council tax helper Budget from annual bill, with optional single person discount (25%)
• Loan repayment calculator Monthly payment, weekly/yearly costs, total interest + balance chart

This site is a collection of standalone HTML pages. Each tool has its own page for SEO and speed, and they all link back here.