China Site Scanner
Find out what breaks when someone opens your site in mainland China. We check more than 60 services, how each one loads, and where your site is served from.
Reads your homepage, your contact page, and your own scripts and stylesheets. Takes about 20 seconds.
Scanning your website
Reading your pages and checking every outside resource against our test data.
Your report
What we found
China launch checklist
What a mainland launch needs, beyond a page that loads.
Each third-party host the page loads, with our verdict.
Want these fixed?
We're a Shanghai team that moves sites behind the Great Firewall and keeps them fast there, whatever they're built on. We'll go through your report with you.
Get a free assessmentHow it works
From form to report in under a minute
Enter your details
Name, company, website and a work email. The scan starts as soon as you send the form.
We read your pages
The scanner reads your homepage and contact page, then your own scripts and stylesheets, and notes every outside resource and how it loads.
Get a dated report
Each problem comes with why it matters, how to fix it, and the test it rests on, with its date.
What we check
Every verdict traces back to a dated test. Where we have no mainland measurement, the report says so.
Fonts and code libraries
Google Fonts, Google Hosted Libraries, Adobe Fonts, Font Awesome, jsDelivr, cdnjs
Forms and captchas
reCAPTCHA, hCaptcha, Turnstile, Typeform, Mailchimp, HubSpot
Analytics and tags
Google Analytics, Tag Manager, Meta Pixel, Hotjar, Clarity, Amplitude
Video and embeds
YouTube, Vimeo, Instagram, X, SoundCloud, Disqus
Maps and payments
Google Maps, Mapbox, OpenStreetMap, Stripe, PayPal
Platforms and back ends
Wix, Squarespace, Webflow, Shopify, Jetpack, Firebase, Algolia
Hosting and CDN
Where the site is served from, the CDN in front of it, and where a mainland visitor gets sent
China launch checklist
ICP and PSB numbers, domain eligibility, Chinese version, Baidu verification
Security
polyfill.io, BootCDN and Staticfile, the domains behind the 2024 supply-chain attack
How we reach a verdict
Verdicts come from dated tests: our own probes from an Alibaba Cloud data centre and a Beijing home broadband line, 21YunBox probes from a mainland data centre, and third-party blocking tests run from inside China. Every finding shows its source and date.
The scan runs from outside China. We see what your pages load and how, and we make a DNS lookup as a mainland visitor would to find out where they get sent. We can't open the page on a phone in Shanghai, so read the report as a map of risks and confirm the big ones on the ground.
Hosts we've never measured are marked as not yet measured. We'd rather say that than guess.