Tools we built because we needed them, kept free because they are cheap to run. No sign-up, no account, nothing to install.
Paste any address and get a plain-English report on speed, security headers, mobile setup and search visibility.
Speed · Security · SEO China reachability checkSee which parts of a site fail for readers inside mainland China — fonts, maps, video, forms, analytics — and what is used instead.
Mainland · Great Firewall Image optimiserResize and convert images to WebP without uploading them anywhere. Typically cuts a photo by 80–95%.
Runs in your browser Greater Bay Area toolkitOverlapping working hours with clients abroad, a multi-currency invoice builder, and a plain-English ICP filing guide.
Meeting hours · Invoices · ICP IP lookupWhat your address says about you: location, network operator and connection type, resolved server-side.
Network Market dataLive indices, equities, currencies, metals and crypto across Hong Kong, the mainland and the US.
Live data Airline EliteWork out which airline status an itinerary earns across 60+ frequent flyer programmes, and what it takes to keep it.
Frequent flyerNeed something like these built for your own business?