Quality

Measured,
not claimed.

We audit every SHOPin storefront with the same public tools you'd use to check it yourself — GTmetrix for performance, WAVE for accessibility, the W3C validator for valid markup. Here are the latest results for the live demo, with links to the source reports.

  • GTmetrix Grade A
  • 0 accessibility errors
  • WAVE AIM score 10/10
  • W3C valid HTML

Performance

GTmetrix Grade A.

Server-side rendering, layered caching and image optimization are configured out of the box — so pages load fast on real-world connections, not just on paper.

gtmetrix.com/reports/demo.shopin.dev
GTmetrix performance report for a SHOPin product page: Grade A, 99% performance, 97% structure, 654ms LCP, 50ms TBT, 0 CLS.
GTmetrix · Lighthouse 12.6.1
A
Grade A

Performance & structure combined

99%Performance
97%Structure
0.65sLCP
50msTBT
0CLS
142Chrome

Test server · London, UK
Generated · 26 May 2026

Representative pages tested

demo.shopin.dev/p/…concert-grand-piano
AGrade99%Perf97%Structure0CLS
demo.shopin.dev/c/accessories
AGrade98%Perf91%Structure0CLS

Accessibility

Zero errors. AIM 10/10.

Semantic structure, ARIA where it counts, and full keyboard operability ship by default. Every audited page returns no errors and no contrast failures in WAVE.

WAVE · WebAIM
10
0 errors

AIM score 10 / 10

0Errors
0Contrast
AAWCAG 2.1
28Features
154ARIA
FullKeyboard

Manual testing complements automated checks
Evaluated · 26 May 2026

wave.webaim.org/report#/demo.shopin.dev
WAVE accessibility report for the SHOPin demo: 0 errors, 0 contrast errors, AIM score 10 out of 10.

Pages evaluated

demo.shopin.dev/ (home)
0Errors0Contrast217ARIA10/10AIM
demo.shopin.dev/c/instruments
0Errors0Contrast154ARIA10/10AIM
demo.shopin.dev/p/cs-pirate-violin
0Errors0Contrast116ARIA10/10AIM

Standards

Valid HTML. Zero warnings.

Markup is checked against the W3C Nu Html Checker — the same validator the standards body maintains. Every audited page parses clean: no errors, no warnings, UTF-8 throughout.

validator.w3.org/nu?doc=demo.shopin.dev/p/cs-pirate-violin
W3C Nu Html Checker result for a SHOPin product page: document checking completed, no errors or warnings to show, UTF-8 encoding.
Nu Html Checker · W3C
0 errors

Valid HTML · 0 warnings

0Errors
0Warnings
UTF-8Encoding
HTML5Doctype
26.6.1vnu
ValidStatus

Nu Html Checker · vnu 26.6.1
Checked · 26 May 2026

Pages validated

demo.shopin.dev/ (home)
0Errors0WarningsUTF-8CharsetValidResult
demo.shopin.dev/p/cs-pirate-violin
0Errors0WarningsUTF-8CharsetValidResult
demo.shopin.dev/c/accessories
0Errors0WarningsUTF-8CharsetValidResult

How we test

Reproducible by anyone.

Performance is measured with GTmetrix running Lighthouse 12.6.1 in Chrome from a London test server. Reports are public — open any link above and you'll see the same Grade A and Core Web Vitals.

Accessibility is evaluated with WAVE by WebAIM, and markup is validated with the W3C Nu Html Checker. Automated checks catch structural, ARIA and standards issues; we pair them with manual keyboard and screen-reader passes, because a clean automated report is a floor, not a finish line.

Try the live demo yourself

Get in touch

Fast and accessible,
by default.

Want these numbers on your storefront? Let us show you how SHOPin gets you there.