klaviyo.com

Conformance report

Tracked site: https://klaviyo.com/. Checked against the Web 1.0 Specification (2026 Edition), front page only, roughly every two weeks.

F

Fails on multiple major faults. Latest check: 2026-09-29. 4 major, 7 minor; 2.4 MB first-party transfer, 125 requests.

Rule by rule

RuleFaultResult
JS-01JavaScript MAJOR
  • inline <script>
  • <script src="https://transcend-cdn.com/cm/f3c1005b-8270-469c-85a4-81fe6c9b70e7/airgap.js?cacheBust=1790683892036">
  • <script src="/_astro/ConsentManager.astro_astro_type_script_index_0_lang.DvqiF_YN.js?dpl=6abba9d08b0c99000858f03e">
  • inline <script>
  • inline <script>
  • and 24 more
TP-01Third-party requests MAJOR
  • https://www.googletagmanager.com (via <link rel=preconnect>)
  • https://js.hs-scripts.com (via <link rel=preconnect>)
  • https://js.hsforms.net (via <link rel=preconnect>)
  • https://cdn.optimizely.com (via <link rel=dns-prefetch>)
  • https://transcend-cdn.com (via <link rel=preconnect>)
  • and 79 more
CK-01Cookies MAJOR
  • Set-Cookie on https://klaviyo.com/
WT-01Excessive transfer MAJOR
  • total first-party transfer 2.45 MB (over 2 MB)
AV-01Autoplaying media pass
HY-01Missing doctype pass
HY-02Missing title pass
HY-03Missing language pass
HY-04Missing charset pass
HY-05Missing alt text 3 minor
  • <img src="https://cdn.sanity.io/images/6ct6b26e/marketing-prod/baeb51700705ac37ed422f09fff">
  • <img src="https://cdn.sanity.io/images/6ct6b26e/marketing-prod/e2f45c0fc5f966c785dbcb07deb">
  • <img src="https://cdn.sanity.io/images/6ct6b26e/marketing-prod/240f336acd9c9d6c0a85dcd83e7">
  • <img src="https://cdn.sanity.io/images/6ct6b26e/marketing-prod/ce5b07ba71d2f4ad7dda0ced439">
  • <img src="https://cdn.sanity.io/images/6ct6b26e/marketing-prod/1a5c39e138782b1c78ca3b31777">
  • and 21 more
FT-01Web fonts 3 minor
  • @font-face in https://www.klaviyo.com/_astro/MarketingSanityBaseLayout.MvCpgOLw.css
  • @font-face in https://www.klaviyo.com/_astro/MarketingSanityBaseLayout.MvCpgOLw.css
  • @font-face in https://www.klaviyo.com/_astro/MarketingSanityBaseLayout.MvCpgOLw.css
  • @font-face in https://www.klaviyo.com/_astro/MarketingSanityBaseLayout.MvCpgOLw.css
  • @font-face in https://www.klaviyo.com/_astro/MarketingSanityBaseLayout.MvCpgOLw.css
  • and 10 more
RQ-01Excessive requests 1 minor
  • 125 resource requests
FR-01First-party frame pass

History

DateGradeMajorsMinors WeightRequests
2026-09-29 F 4 7 2.4 MB 125
2026-09-15 F 4 7 4.1 MB 125
2026-09-01 F 4 7 4.9 MB 111
2026-08-17 F 4 7 4.8 MB 110