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https://www.ikea.fr

Performance

· 16 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
72
GRADE
C
FIX
4
REVIEW
2
PASS
8
INFO
2

Performance-focused optimization plan with CWV assessment, top offenders, and time estimates

Mobile Desktop
32
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
100
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
96
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
100
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

6.30 s

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

15.73 s

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

1.22 s

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.002

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

10.50 s

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

20.10 s

Page Load Progression

1.7 s
3.4 s
5.1 s
6.9 s
8.6 s
10.3 s
12.0 s
13.7 s
Checks
16
8 PASS 2 REVIEW 4 FIX
F
Page Weight Budget
Action
4.4 MB transferred, 326 requests
FIX
4.4 MB transferred, 326 requests
Critical::
Page weighs 8.8 MB (4.4 MB transferred)
Warning::
JavaScript is 1.2 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.2 MB
Warning::
Images are 1.1 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 1.1 MB
Info::
CSS is 227 KB — consider purging unused styles
Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.
Got: 227 KB
Warning::
326 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 0.93 g CO2 per page load
4.4 MB / 2.4 MB budget
4.4 MB transferred
326 requests
0.93 g CO2 per page load
Other 1.4 MiB 31%
JavaScript 1.2 MiB 26%
Images 1.1 MiB 25%
Other 289.4 KiB 6%
CSS 227.4 KiB 5%
HTML 176.0 KiB 4%
Other 88.3 KiB 2%
Fonts 23.2 KiB 1%
Other 3.4 KiB 0%
Other 1.9 KiB 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Over budget

Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.

Why this matters

JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.

Source: web.dev

Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.

Why this matters

Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.

Source: web.dev

Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.

Why this matters

CSS bundle is large — purge unused styles (PurgeCSS, Tailwind JIT) to reduce CSS payload.

Source: web.dev

Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.

Why this matters

High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.

Source: web.dev

D
Third-Party Impact
Action
100% third-party, 0 ms blocking
FIX
100% third-party, 0 ms blocking
Warning::
Third-party code accounts for 100% of page weight (4.4 MiB of 4.4 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Execution Cost
Action
35178ms total JS execution
FIX
35178ms total JS execution
Warning::
https://www.ikea.com/fr/fr/: 26727ms CPU time
Warning::
Unattributable: 2615ms CPU time
Warning::
https://www.ikea.com/global/assets/dwf/hri/index-B...: 1249ms CPU time
Warning::
https://cdn.cookielaw.org/scripttemplates/202508.2...: 775ms CPU time
Warning::
https://www.ikea.com/global/assets/dwf/hri/hooks.m...: 603ms CPU time
Warning::
Third-party scripts: 35178ms (100% of total)

Main Thread Breakdown

Other 47% Style & Layout 21% Rendering 17% Script Evaluation 13%
ScriptTotalScriptingParse/CompileParty
https://www.ikea.com/fr/fr/26727ms256ms16ms3rd
Unattributable2615ms499ms0ms3rd
https://www.ikea.com/global/assets/dwf/hri/index-BuyN3tOQ.js1249ms1008ms0ms3rd
https://cdn.cookielaw.org/scripttemplates/202508.2.0/otBannerSdk.js775ms550ms94ms3rd
https://www.ikea.com/global/assets/dwf/hri/hooks.module-DOV_Rl57.js603ms114ms0ms3rd
https://www.ikea.com/global/assets/dwf/listing/ProductCardContainer-EQYf3ODv.js491ms341ms1ms3rd
https://www.ikea.com/fr/fr/cookieconsent/scripts/cookieconsent-onetrust-js.js?v=mkpkr50w395ms343ms2ms3rd
https://www.ikea.com/global/assets/dwf/hri/_virtual_fika-client-CxYnF3gj.js361ms10ms0ms3rd
https://www.ikea.com/global/assets/dwf/listing/sharedComponents-D0hzjLxn.js355ms253ms0ms3rd
https://www.ikea.com/fr/fr/user-generated-content/rr-pip/app/rr-pip.d407618c.bundle.js278ms140ms2ms3rd

Showing top 10 of 21 scripts

D
JS Bundles
Action
172 scripts, 330 KB unused
FIX
172 scripts, 330 KB unused
Warning::
https://cdn.cookielaw.org/scripttemplates/202508.2...: 73 KB unused (61%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.ikea.com/fr/fr/user-generated-content/...: 62 KB unused (71%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.ikea.com/fr/fr/ugc/ratings-reviews/lea...: 40 KB unused (68%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.ikea.com/fr/fr/experiment-fragment/scr...: 33 KB unused (74%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.ikea.com/fr/fr/header-footer/javascrip...: 27 KB unused (55%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 330 KB
330 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://cdn.cookielaw.org/scripttemplates/202508.2.0/otBannerSdk.js121 KB73 KB (61%)✓3rd
https://www.ikea.com/fr/fr/user-generated-content/rr-pip/app/rr-pip.d407618c.bundle.js88 KB62 KB (71%)✓3rd
https://www.ikea.com/fr/fr/ugc/ratings-reviews/leave-review/fragments/rr-leave-review.bundle-5ece4ef4.js59 KB40 KB (68%)✓3rd
https://www.ikea.com/fr/fr/experiment-fragment/scripts/index-B53ZSB5Y.js45 KB33 KB (74%)✓3rd
https://www.ikea.com/fr/fr/header-footer/javascripts/main.bb4dc6b4eabf0d8b82cf.js50 KB27 KB (55%)✓3rd
https://www.ikea.com/fr/fr/header-footer/javascripts/postalCodePicker.79204a7b7c785664a029.js37 KB25 KB (69%)✓3rd
https://www.ikea.com/fr/fr/header-footer/javascripts/storePicker.5e099040433e167c8ade.js29 KB25 KB (86%)✓3rd
https://www.ikea.com/fr/fr/header-footer/javascripts/megamenu.18dc790f99c762b4c126.js27 KB23 KB (87%)✓3rd
https://www.ikea.com/fr/fr/header-footer/javascripts/mobileCinderella.99e1978965177ef44ac6.js32 KB21 KB (67%)✓3rd
https://www.ikea.com/global/assets/dwf/hri/cross-CpLuRtB4.js1 KB—✓3rd

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

C
Image Optimization
Action
63 images, 0 KB saveable
REVIEW
63 images, 0 KB saveable
Warning::
https://www.ikea.com/global/assets/logos/external-... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.ikea.com/global/assets/logos/external-... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.ikea.com/global/assets/logos/external-... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.ikea.com/global/assets/logos/external-... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.ikea.com/global/assets/logos/external-... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.ikea.com/global/assets/logos/brand/ike... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.ikea.com/global/assets/logos/external-... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.ikea.com/global/assets/logos/external-... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.ikea.com/global/assets/logos/external-... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
63 images 1.1 MB
0 oversized -0 KB
11 legacy format
9 missing dimensions CLS risk

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

B
HTTP Caching
no-cache
REVIEW
no-cache
Info::
Cache-Control header is set
Got: no-cache
Info::
ETag present — enables conditional (304) responses
Cache-Control

no-cache

DirectiveValueMeaning
no-cache—Cache but always revalidate first
A+
Text Compression
All text resources are compressed
PASS
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A+
Font Loading
2 fonts (23 KB)
PASS
2 fonts (23 KB)
Info::
2 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

2

23 KB total

Render-blocking

0

of 2

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s 14.0 s 16.0 s FCP 6.3 s LCP 15.7 shttps://www.ikea.com/global/assets/fonts/woff2/noto-ikea-400.latin.5a052965.woff2noto-ikea-400.latin.5a0... https://www.ikea.com/global/assets/fonts/woff2/noto-ikea-400.latin.5a052965.woff2 — 11.6 KiB — 0 ms — font-display: swaphttps://www.ikea.com/global/assets/fonts/woff2/noto-ikea-700.latin.a3f10ed8.woff2noto-ikea-700.latin.a3f... https://www.ikea.com/global/assets/fonts/woff2/noto-ikea-700.latin.a3f10ed8.woff2 — 11.6 KiB — 0 ms — font-display: swap
noto-ikea-400.latin.5a0... woff2 swap
Size 12 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
noto-ikea-700.latin.a3f... woff2 swap
Size 12 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
Optimization checklist
  • Preload critical fonts (priority=high)
  • Use woff2 format for all fonts
  • Set font-display to swap, optional, or fallback
  • Subset large fonts (≤100 KB each)
A+
Resource Caching
All resources properly cached
PASS
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+
Critical Rendering Path
No render-blocking resources
PASS
No render-blocking resources
Info::
No render-blocking resources detected
A+
Resource Hints
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
A+
Render-Blocking Resources
No render-blocking resources detected
PASS
No render-blocking resources detected
Info::
No render-blocking resources detected in <head>
A+
Third-Party Resources
No third-party resources detected
PASS
No third-party resources detected
A+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Cloudflare

Network Waterfall
326 requests over 0ms
INFO

Performance analysis not available for this result.

Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
100% of JavaScript execution is third-party
First-party Third-party 35178ms · 483KB · €382/mo
www.ikea.com
Other
Costly
Execution 26727ms
Transfer 80 KB
Monthly Cost €290/mo
Unattributable
Other
Costly
Execution 2615ms
Transfer 0 KB
Monthly Cost €28/mo
www.ikea.com
Other
Costly
Execution 1249ms
Transfer 3 KB
Monthly Cost €14/mo
OneTrust
Consent
Essential
Execution 775ms
Transfer 121 KB
Unused 61%
Monthly Cost €8/mo
www.ikea.com
Other
Costly
Execution 603ms
Transfer 2 KB
Monthly Cost €7/mo
www.ikea.com
Other
Costly
Execution 491ms
Transfer 30 KB
Monthly Cost €5/mo
www.ikea.com
Other
Costly
Execution 395ms
Transfer 3 KB
Monthly Cost €4/mo
www.ikea.com
Other
Costly
Execution 361ms
Transfer 10 KB
Monthly Cost €4/mo
www.ikea.com
Other
Costly
Execution 355ms
Transfer 14 KB
Monthly Cost €4/mo
www.ikea.com
Other
Costly
Execution 278ms
Transfer 88 KB
Unused 71%
Monthly Cost €3/mo
www.ikea.com
Other
Costly
Execution 215ms
Transfer 50 KB
Unused 55%
Monthly Cost €2/mo
www.ikea.com
Other
Optional
Execution 180ms
Transfer 7 KB
Monthly Cost €2/mo
www.ikea.com
Other
Optional
Execution 173ms
Transfer 12 KB
Monthly Cost €2/mo
www.ikea.com
Other
Optional
Execution 167ms
Transfer 24 KB
Monthly Cost €2/mo
www.ikea.com
Other
Optional
Execution 135ms
Transfer 19 KB
Monthly Cost €1/mo
www.ikea.com
Other
Optional
Execution 106ms
Transfer 3 KB
Monthly Cost €1/mo
OneTrust
Consent
Essential
Execution 96ms
Transfer 9 KB
Monthly Cost €1/mo
challenges.cloudflare.com
Other
Optional
Execution 85ms
Transfer 0 KB
Monthly Cost €1/mo
www.ikea.com
Other
Optional
Execution 60ms
Transfer 1 KB
Monthly Cost €1/mo
www.ikea.com
Other
Optional
Execution 59ms
Transfer 1 KB
Monthly Cost €1/mo
www.ikea.com
Other
Optional
Execution 55ms
Transfer 4 KB
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • www.ikea.com adds 26727ms and costs ~€290/month
  • Unattributable adds 2615ms and costs ~€28/month
  • www.ikea.com adds 1249ms and costs ~€14/month
  • www.ikea.com adds 603ms and costs ~€7/month
  • www.ikea.com adds 491ms and costs ~€5/month
  • www.ikea.com adds 395ms and costs ~€4/month
  • www.ikea.com adds 361ms and costs ~€4/month
  • www.ikea.com adds 355ms and costs ~€4/month
  • www.ikea.com adds 278ms and costs ~€3/month
  • www.ikea.com adds 215ms and costs ~€2/month

100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.

Why this matters

When third-party JS execution time exceeds your own, performance gains from frontend work are capped by code you don't own.

Learn more ▾

Every millisecond of third-party JS competes with your own for main-thread time. If their share is bigger than yours, optimization on your code base barely moves the needle. Audit, defer, or remove third-parties before further frontend optimization. Use Lighthouse's third-party audit to identify the worst offenders.

Source: web.dev

www.ikea.com takes 26727ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

Unattributable takes 2615ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

www.ikea.com takes 1249ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

61% of OneTrust's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

www.ikea.com takes 603ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

www.ikea.com takes 491ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

www.ikea.com takes 395ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

www.ikea.com takes 361ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

www.ikea.com takes 355ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

www.ikea.com takes 278ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

71% of www.ikea.com's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

www.ikea.com takes 215ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

55% of www.ikea.com's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

How third-party costs are calculated

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

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