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PDP-033Product page · mobileHigh

Largest Contentful Paint under 2.5s on mobile

Largest Contentful Paint (LCP) under 2.5 seconds on mobile.

Check my store for this rule →Cite this
Free · no card · runs all rules at once · judged on 40 stores · updated
23%of the audited stores we could judge fail this rule
24 pass7 partial9 failPublished audits · September 2026
Stores judged
40
of 40 published audits
Score weight
1.1pts
of the 100-point score
Page share
30%
of the score is the product page

What earns each verdict

Same outcomes on every UXFix rule · how verdicts work
✓ Pass24

LCP ≤ 2.5s.

~ Partial7

LCP 2.5–4.0s = needs improvement.

✕ Fail9

LCP > 4.0s.

not assessable is recorded when the rule applied but the store could not be judged on it (bot protection, a region lock, a step we could not reach), and not applicable when the store has nothing for the rule to judge. Those stores are left out of every number on this page, never guessed. Why we do that
Why it matters

The main content of the product page takes longer than 2.5 seconds to appear ("Largest Contentful Paint" is slow).

Every extra second of load time drops conversion by ~7% (Google, 2024). 2.5s is Google's threshold for a good experience. Above 4s is considered poor and hurts search rankings too.

That sentence is the one a failing store sees in its own UXFix report.How rules are weighted and scored →
40 audited stores, one dot each
9 fail
PassPartialFail

Every published UXFix audit this rule could be judged on, as of 23 Sep 2026. A count of real stores, not a simulation of yours.

How we test it

Scripted walk, fresh signed-out browser · the full walk
  1. 1Fresh browserSigned out, cookies cleared, desktop and mobile viewports, the store's live theme.
  2. 2Open a productA real, in-stock product page, found the way a shopper finds one.
  3. 3Judge this ruleAgainst the standard above, on what a shopper can see.
  4. 4Record the verdictPass, partial or fail, saved with the screenshot it was judged on.
What the agent looks for
Largest Contentful Paint (LCP) under 2.5 seconds on mobile.
Confidence
The rulebook rates this check’s confidence High. When the agent is not sure, the rule is recorded as not assessable rather than guessed.
Not judged
0 of 40 published audits: the rule did not apply or could not be judged. Dropped, never guessed.

The numbers behind the rule

Published UXFix audits · more statistics
Published audits failing this rule
No pictures here: this rule is judged inside the page code, which no shopper ever sees, so there is nothing to photograph.
Where this rule sits among 103 UX rules
Most-failed rank
#43
Score weight rank
#35
Fail rate
23%

Score weight: a fail costs 1.1 pts of of the 100-point score; a partial costs half that. Most-failed rank is among the 79 rules with enough published audits to report a rate.

The fix

The same steps a failing store sees in its report

A pass means: LCP ≤ 2.5s.

Severity
High
Score gain
+1.1pts
Page
Product page

Score gain is roughly what a fail-to-pass change adds; rules that could not be judged are left out, which can move it a little. Re-run a free audit after the change ships to confirm the verdict moved.

Checklist for the pass
0 of 3

Tick each step as you ship it. The audit judges the live store, so re-run it once all of them are done.

Every store that fails this rule

The 9 audited stores that fail Largest Contentful Paint under 2.5s on mobile, with each store's published score and the day it was audited.
#StoreScoreAuditedPublished audit
1Mujimuji.us61Open audit
2Arhausarhaus.com60Open audit
3Verabradleyverabradley.com58Open audit
4Everlaneeverlane.com62Open audit
5Reebokreebok.com58Open audit
6Reebokreebok.com57Open audit
7Ladounladoun.com41Open audit
8Citstorescitstores.com65Open audit
9Iliabeautyiliabeauty.com62Open audit

What our auditors say about this rule

Past a few seconds, the fastest growing group on your product page is the people leaving it.
Abdulhameid Grandoka, Co-founder, UXFix

Written by the person who audits this rule, and reviewed every quarter.

Keep going

All rules →
RulePDP-002
Add-to-cart CTA above the fold on mobileProduct page · High ›
RulePDP-003
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RulePDP-004
Shipping cost or estimate discoverable from PDPProduct page · Critical ›
RulePDP-005
Delivery/arrival date estimate shownProduct page · High ›
RulePDP-006
Stock/availability state explicit (in stock, low stock, out of stock)Product page · High ›
RulePDP-009
Selected variant state unambiguous (visual + text confirmation)Product page · Medium ›
RulePDP-011
Product title includes brand + descriptive attributes (not SKU-only)Product page · Low ›
RulePDP-013
Quantity selector present and easy to use (tap-friendly on mobile)Product page · Low ›
Cite this

«9 of 40 online stores audited by UXFix fail the rule "Largest Contentful Paint under 2.5s on mobile" (PDP-033) as of September 2026. UXFix, uxfix.ai/audits/rules/product-page-load-speed»

Rule record · JSON
Dataset →
{
  "id": "PDP-033",
  "name": "Largest Contentful Paint under 2.5s on mobile",
  "area": "pdp",
  "severity": "high",
  "weight": 1.084,
  "published_audits": {
    "judged": 40,
    "pass": 24,
    "partial": 7,
    "fail": 9
  },
  "updated": "2026-09-23"
}
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