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https://klarna.com

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
72
GRADE
C
FIX
5
REVIEW
3
PASS
5
INFO
2

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

Mobile Desktop
77
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
89
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.

1.41 s

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

2.42 s

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

182 ms

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

0.000

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

1.50 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.

3.89 s

Page Load Progression

375 ms
750 ms
1.1 s
1.5 s
1.9 s
2.2 s
2.6 s
3.0 s
Checks
15
5 PASS 3 REVIEW 5 FIX
D
Page Weight Budget
Action
2.6 MB transferred, 103 requests
FIX
2.6 MB transferred, 103 requests
Warning::
Page weighs 7.8 MB (2.6 MB transferred)
Warning::
JavaScript is 2.0 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 2.0 MB
Warning::
103 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 0.54 g CO2 per page load
2.6 MB / 2.4 MB budget
2.6 MB transferred
103 requests
0.54 g CO2 per page load
JavaScript 2.0 MiB 78%
Fonts 189.6 KiB 7%
Images 157.8 KiB 6%
HTML 132.3 KiB 5%
Other 50.9 KiB 2%
CSS 14.4 KiB 1%
Other 10.4 KiB 0%
Other 10.3 KiB 0%
Other 813 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

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 (2.6 MiB of 2.6 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Bundles
Action
36 scripts, 1.0 MB unused
FIX
36 scripts, 1.0 MB unused
Warning::
https://owp.klarna.com/38b12937d261/1be2c35156de/c...: 296 KB unused (59%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://38b12937d261.08d5593f.eu-west-1.token.awsw...: 280 KB unused (56%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://owp.klarna.com/static/58375-7a68007e.js: 119 KB unused (77%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-W59...: 81 KB unused (50%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://owp.klarna.com/static/main-895cb1e6.js: 62 KB unused (47%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 1.0 MB
1069 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://owp.klarna.com/38b12937d261/1be2c35156de/challenge.js501 KB296 KB (59%)✓3rd
https://38b12937d261.08d5593f.eu-west-1.token.awswaf.com/38b12937d261/1be2c35156de/2f5cb8c93ee7/challenge.js501 KB280 KB (56%)✓3rd
https://owp.klarna.com/static/58375-7a68007e.js156 KB119 KB (77%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-W597GXV163 KB81 KB (50%)✓3rd
https://owp.klarna.com/static/main-895cb1e6.js133 KB62 KB (47%)✓3rd
https://cdn.cookielaw.org/scripttemplates/202312.1.0/otBannerSdk.js104 KB57 KB (55%)✓3rd
https://edge.fullstory.com/s/fs.js80 KB53 KB (67%)✓3rd
https://owp.klarna.com/static/commons-b4b6251b.js82 KB52 KB (64%)✓3rd
https://owp.klarna.com/static/65266-266345e4.js87 KB45 KB (52%)✓3rd
https://owp.klarna.com/static/98116-2f180f0d.js38 KB23 KB (61%)✓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

F
Page Weight Inventory
Action
103 resources · 2.6 MB · 1.0 MB savings available
FIX
103 resources · 2.6 MB · 1.0 MB savings available
Warning::
Page weight 1.6 MB over 1MB target
Got: 2.6 MB Expected: ≤ 1 MB
Info::
~1.0 MB of savings available
Warning::
102 third-party resources (100% of weight)
Info::
2 resources over 200KB
103 resources · 2.6 MiB · 102 third-party 1.6 MiB over 1MB target
JavaScript 78% · 2.0 MiB
Font 7% · 189.6 KiB
Image 6% · 166.0 KiB
Document 5% · 135.5 KiB
Other 2% · 57.1 KiB
CSS 1% · 18.2 KiB

~1.0 MiB of savings available

Remove unused JavaScript: 1.0 MiB
F
HTTP Caching
Action
No cache headers
FIX
No cache headers
Warning::
No Cache-Control header found
Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.

No Cache-Control header

Adding a Cache-Control header can significantly improve repeat-visit performance.

B
Image Optimization
24 images, 0 KB saveable
REVIEW
24 images, 0 KB saveable
Warning::
https://images.ctfassets.net/31h9ykss8g0q/2uYooyxZ... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.ctfassets.net/31h9ykss8g0q/39AdylLc... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
24 images 158 KB
0 oversized -0 KB
3 legacy format
2 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

C
JS Execution Cost
Action
1566ms total JS execution
REVIEW
1566ms total JS execution
Warning::
https://owp.klarna.com/static/framework-07d90868.j...: 466ms CPU time
Warning::
https://owp.klarna.com/38b12937d261/1be2c35156de/c...: 283ms CPU time
Info::
https://www.klarna.com/fr/?grs=%2F&grr=https%3A%2F...: 220ms CPU time
Info::
Unattributable: 209ms CPU time
Info::
https://38b12937d261.08d5593f.eu-west-1.token.awsw...: 201ms CPU time
Warning::
Third-party scripts: 1566ms (100% of total)

Main Thread Breakdown

Script Evaluation 64% Other 15% Script Parsing & Compilation 9% Style & Layout 6%
ScriptTotalScriptingParse/CompileParty
https://owp.klarna.com/static/framework-07d90868.js466ms433ms11ms3rd
https://owp.klarna.com/38b12937d261/1be2c35156de/challenge.js283ms227ms29ms3rd
https://www.klarna.com/fr/?grs=%2F&grr=https%3A%2F%2Fwww.klarna.com%2F220ms27ms1ms3rd
Unattributable209ms59ms0ms3rd
https://38b12937d261.08d5593f.eu-west-1.token.awswaf.com/38b12937d261/1be2c35156de/2f5cb8c93ee7/challenge.js201ms144ms29ms3rd
https://owp.klarna.com/static/main-895cb1e6.js78ms62ms13ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-W597GXV56ms38ms11ms3rd
https://cdn.cookielaw.org/scripttemplates/202312.1.0/otBannerSdk.js53ms34ms10ms3rd
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

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
7 fonts (190 KB)
PASS
7 fonts (190 KB)
Info::
7 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

7

190 KB total

Render-blocking

0

of 7

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s 1.5 s 2.0 s 2.5 s FCP 1.4 s LCP 2.4 shttps://x.klarnacdn.net/ui/fonts/v1.5/KlarnaTitle-Bold.woff2KlarnaTitle-Bold.woff2 https://x.klarnacdn.net/ui/fonts/v1.5/KlarnaTitle-Bold.woff2 — 27.2 KiB — 54 ms — font-display: swaphttps://x.klarnacdn.net/ui/fonts/v1.5/KlarnaText-Regular.woff2KlarnaText-Regular.woff2 https://x.klarnacdn.net/ui/fonts/v1.5/KlarnaText-Regular.woff2 — 25.6 KiB — 73 ms — font-display: swaphttps://x.klarnacdn.net/ui/fonts/v1.5/KlarnaText-Italic.woff2KlarnaText-Italic.woff2 https://x.klarnacdn.net/ui/fonts/v1.5/KlarnaText-Italic.woff2 — 27.0 KiB — 99 ms — font-display: swaphttps://x.klarnacdn.net/ui/fonts/v1.5/KlarnaText-Medium.woff2KlarnaText-Medium.woff2 https://x.klarnacdn.net/ui/fonts/v1.5/KlarnaText-Medium.woff2 — 26.2 KiB — 83 ms — font-display: swaphttps://x.klarnacdn.net/ui/fonts/v1.5/KlarnaText-MediumItalic.woff2KlarnaText-MediumItalic... https://x.klarnacdn.net/ui/fonts/v1.5/KlarnaText-MediumItalic.woff2 — 27.6 KiB — 83 ms — font-display: swaphttps://x.klarnacdn.net/ui/fonts/v1.5/KlarnaText-Bold.woff2KlarnaText-Bold.woff2 https://x.klarnacdn.net/ui/fonts/v1.5/KlarnaText-Bold.woff2 — 26.2 KiB — 81 ms — font-display: swaphttps://x.klarnacdn.net/ui/fonts/v1.5/KlarnaText-BoldItalic.woff2KlarnaText-BoldItalic.w... https://x.klarnacdn.net/ui/fonts/v1.5/KlarnaText-BoldItalic.woff2 — 29.9 KiB — 108 ms — font-display: swap
KlarnaTitle-Bold.woff2 woff2 swap
Size 27 KB
Load time 54 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
KlarnaText-Regular.woff2 woff2 swap
Size 26 KB
Load time 73 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
KlarnaText-Italic.woff2 woff2 swap
Size 27 KB
Load time 99 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
KlarnaText-Medium.woff2 woff2 swap
Size 26 KB
Load time 83 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
KlarnaText-MediumItalic... woff2 swap
Size 28 KB
Load time 83 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
KlarnaText-Bold.woff2 woff2 swap
Size 26 KB
Load time 81 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
KlarnaText-BoldItalic.w... woff2 swap
Size 30 KB
Load time 108 ms
Start 1.2 s
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
Network Waterfall
103 requests over 6375ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s FCP 1.4 s LCP 2.4 shttps://klarna.com// https://klarna.com/ — 301 — 269 B — 9 ms — h2https://www.klarna.com/www.klarna.com/ https://www.klarna.com/ — 202 — 2.9 KiB — 13 ms — h2https://38b12937d261.08d5593f.eu-west-1.token.awswaf.com/38b12937d261/1be2c35156de/2f5cb8c93ee7/challenge.js38b12937d261.08d5593f.eu-west-1.tok... https://38b12937d261.08d5593f.eu-west-1.token.awswaf.com/38b12937d261/1be2c35156de/2f5cb8c93ee7/challenge.js — 200 — 501.0 KiB — 86 ms — h2https://38b12937d261.08d5593f.eu-west-1.token.awswaf.com/38b12937d261/1be2c35156de/2f5cb8c93ee7/inputs?client=browser38b12937d261.08d5593f.eu-west-1.tok... https://38b12937d261.08d5593f.eu-west-1.token.awswaf.com/38b12937d261/1be2c35156de/2f5cb8c93ee7/inputs?client=browser — 200 — 827 B — 132 ms — h3https://www.klarna.com/favicon.icowww.klarna.com/favicon.ico https://www.klarna.com/favicon.ico — 202 — 538 B — 6 ms — h2https://38b12937d261.08d5593f.eu-west-1.token.awswaf.com/38b12937d261/1be2c35156de/2f5cb8c93ee7/mp_verify38b12937d261.08d5593f.eu-west-1.tok... https://38b12937d261.08d5593f.eu-west-1.token.awswaf.com/38b12937d261/1be2c35156de/2f5cb8c93ee7/mp_verify — 200 — 623 B — 224 ms — h3https://38b12937d261.08d5593f.eu-west-1.token.awswaf.com/38b12937d261/1be2c35156de/2f5cb8c93ee7/mp_verify38b12937d261.08d5593f.eu-west-1.tok... https://38b12937d261.08d5593f.eu-west-1.token.awswaf.com/38b12937d261/1be2c35156de/2f5cb8c93ee7/mp_verify — 200 — 623 B — 214 ms — h3https://www.klarna.com/www.klarna.com/ https://www.klarna.com/ — 307 — 1.9 KiB — 99 ms — h3https://www.klarna.com/fr/?grs=%2F&grr=https%3A%2F%2Fwww.klarna.com%2Fwww.klarna.com/fr/?grs=%2F&grr=http... https://www.klarna.com/fr/?grs=%2F&grr=https%3A%2F%2Fwww.klarna.com%2F — 200 — 126.3 KiB — 328 ms — h3https://images.ctfassets.net/31h9ykss8g0q/2TcCczNJyq4U6vewMkXgTd/98623fac263a48c36df64308ca4ea9ce/Homepage_hero_Desktop_asset__-_FR.png?w=1000&q=80&fm=avifimages.ctfassets.net/31h9ykss8g0q/2... https://images.ctfassets.net/31h9ykss8g0q/2TcCczNJyq4U6vewMkXgTd/98623fac263a48c36df64308ca4ea9ce/Homepage_hero_Desktop_asset__-_FR.png?w=1000&q=80&fm=avif — 200 — 56.0 KiB — 84 ms — h2https://owp.klarna.com/static/features-klarnaMarketing-slots-klarnaFooter-KlarnaFooterOnVisible-520d3864.cssowp.klarna.com/static/features-klar... https://owp.klarna.com/static/features-klarnaMarketing-slots-klarnaFooter-KlarnaFooterOnVisible-520d3864.css — 200 — 782 B — 35 ms — h2https://owp.klarna.com/static/components-searchAndCompare-SearchAndCompare-35a7fb23.cssowp.klarna.com/static/components-se... https://owp.klarna.com/static/components-searchAndCompare-SearchAndCompare-35a7fb23.css — 200 — 1.3 KiB — 36 ms — h2https://owp.klarna.com/static/components-featuredStoreGrid-FeaturedStoreGrid-f65d23b5.cssowp.klarna.com/static/components-fe... https://owp.klarna.com/static/components-featuredStoreGrid-FeaturedStoreGrid-f65d23b5.css — 200 — 1.4 KiB — 42 ms — h2https://owp.klarna.com/static/components-homeContentSlider-HomeContentSlider-24358618.cssowp.klarna.com/static/components-ho... https://owp.klarna.com/static/components-homeContentSlider-HomeContentSlider-24358618.css — 200 — 1.1 KiB — 37 ms — h2https://owp.klarna.com/static/components-paymentMethods-PaymentMethods-82442bc7.cssowp.klarna.com/static/components-pa... https://owp.klarna.com/static/components-paymentMethods-PaymentMethods-82442bc7.css — 200 — 1.3 KiB — 38 ms — h2https://owp.klarna.com/static/features-home-routes-KlarnaHome-KlarnaHome-387dd184.cssowp.klarna.com/static/features-home... https://owp.klarna.com/static/features-home-routes-KlarnaHome-KlarnaHome-387dd184.css — 200 — 3.1 KiB — 37 ms — h2https://owp.klarna.com/static/apps-klarna-Layout-f510adde.cssowp.klarna.com/static/apps-klarna-L... https://owp.klarna.com/static/apps-klarna-Layout-f510adde.css — 200 — 894 B — 39 ms — h2https://owp.klarna.com/static/58375-e771d97d.cssowp.klarna.com/static/58375-e771d97... https://owp.klarna.com/static/58375-e771d97d.css — 200 — 4.7 KiB — 40 ms — h2https://x.klarnacdn.net/ui/fonts/v1.5/KlarnaTitle-Bold.woff2x.klarnacdn.net/ui/fonts/v1.5/Klarn... https://x.klarnacdn.net/ui/fonts/v1.5/KlarnaTitle-Bold.woff2 — 200 — 27.2 KiB — 54 ms — h3https://x.klarnacdn.net/ui/fonts/v1.5/KlarnaText-Regular.woff2x.klarnacdn.net/ui/fonts/v1.5/Klarn... https://x.klarnacdn.net/ui/fonts/v1.5/KlarnaText-Regular.woff2 — 200 — 25.6 KiB — 73 ms — h3https://x.klarnacdn.net/ui/fonts/v1.5/KlarnaText-Italic.woff2x.klarnacdn.net/ui/fonts/v1.5/Klarn... https://x.klarnacdn.net/ui/fonts/v1.5/KlarnaText-Italic.woff2 — 200 — 27.0 KiB — 99 ms — h3https://x.klarnacdn.net/ui/fonts/v1.5/KlarnaText-Medium.woff2x.klarnacdn.net/ui/fonts/v1.5/Klarn... https://x.klarnacdn.net/ui/fonts/v1.5/KlarnaText-Medium.woff2 — 200 — 26.2 KiB — 83 ms — h3https://x.klarnacdn.net/ui/fonts/v1.5/KlarnaText-MediumItalic.woff2x.klarnacdn.net/ui/fonts/v1.5/Klarn... https://x.klarnacdn.net/ui/fonts/v1.5/KlarnaText-MediumItalic.woff2 — 200 — 27.6 KiB — 83 ms — h3https://x.klarnacdn.net/ui/fonts/v1.5/KlarnaText-Bold.woff2x.klarnacdn.net/ui/fonts/v1.5/Klarn... https://x.klarnacdn.net/ui/fonts/v1.5/KlarnaText-Bold.woff2 — 200 — 26.2 KiB — 81 ms — h3https://x.klarnacdn.net/ui/fonts/v1.5/KlarnaText-BoldItalic.woff2x.klarnacdn.net/ui/fonts/v1.5/Klarn... https://x.klarnacdn.net/ui/fonts/v1.5/KlarnaText-BoldItalic.woff2 — 200 — 29.9 KiB — 108 ms — h3https://images.ctfassets.net/31h9ykss8g0q/ok77FpnFWu7DxmhiRhhwU/8de0cf4db0b31fbcb34322e364c775ce/CheckoutFR.png?w=1000&q=80&fm=avifimages.ctfassets.net/31h9ykss8g0q/o... 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https://owp.klarna.com/static/features-dataProtection-slots-dataProtection-DataProtection-3f7ace6b.js — 200 — 2.0 KiB — 49 ms — h3https://images.ctfassets.net/31h9ykss8g0q/2uYooyxZiA9SeB7PPFpP8Y/3c55637003ba57bf1ce89409f1c012d7/badge_with_title?w=114&q=80&fm=avifimages.ctfassets.net/31h9ykss8g0q/2... https://images.ctfassets.net/31h9ykss8g0q/2uYooyxZiA9SeB7PPFpP8Y/3c55637003ba57bf1ce89409f1c012d7/badge_with_title?w=114&q=80&fm=avif — 200 — 1.6 KiB — 51 ms — h2https://www.googletagmanager.com/gtm.js?id=GTM-W597GXVwww.googletagmanager.com/gtm.js?id=... https://www.googletagmanager.com/gtm.js?id=GTM-W597GXV — 200 — 163.0 KiB — 147 ms — h2https://images.ctfassets.net/31h9ykss8g0q/619maPtfOUCoZsyGyaNqxq/9d439932da1be66558620b223585b5c2/NofeesFR.png?w=396&q=80&fm=avifimages.ctfassets.net/31h9ykss8g0q/6... https://images.ctfassets.net/31h9ykss8g0q/619maPtfOUCoZsyGyaNqxq/9d439932da1be66558620b223585b5c2/NofeesFR.png?w=396&q=80&fm=avif — 200 — 4.7 KiB — 46 ms — 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https://images.ctfassets.net/31h9ykss8g0q/4Olt7Z9LLCoAQU31nyR91X/41e21f9055830357e69df38c3a29eac0/Web_Device_ScreenSimplified_Cashback_HowItWorks_3_Balloon_1x1_en.jpg?w=396&q=80&fm=avif — 200 — 4.3 KiB — 14 ms — h2https://images.ctfassets.net/31h9ykss8g0q/3qojeaKSb1JTHB1DmxxSl6/1bd3a662e8a15d73e8f9259f43b53aa8/FR_flex_interest_up_mobile_gif.gif?w=396&q=80&fm=avifimages.ctfassets.net/31h9ykss8g0q/3... https://images.ctfassets.net/31h9ykss8g0q/3qojeaKSb1JTHB1DmxxSl6/1bd3a662e8a15d73e8f9259f43b53aa8/FR_flex_interest_up_mobile_gif.gif?w=396&q=80&fm=avif — 200 — 22.2 KiB — 43 ms — h2https://edge.fullstory.com/s/fs.jsedge.fullstory.com/s/fs.js https://edge.fullstory.com/s/fs.js — 200 — 79.9 KiB — 97 ms — h2https://cdn.cookielaw.org/consent/1afb6e77-1c88-4707-a54a-6d7af558c4ff/1afb6e77-1c88-4707-a54a-6d7af558c4ff.jsoncdn.cookielaw.org/consent/1afb6e77-... https://cdn.cookielaw.org/consent/1afb6e77-1c88-4707-a54a-6d7af558c4ff/1afb6e77-1c88-4707-a54a-6d7af558c4ff.json — 200 — 2.4 KiB — 80 ms — h2https://evt2.klarna.app/s/settings/o-QV7-eu1/v1/webevt2.klarna.app/s/settings/o-QV7-eu... https://evt2.klarna.app/s/settings/o-QV7-eu1/v1/web — 200 — 6.7 KiB — 61 ms — h2https://cdn.cookielaw.org/scripttemplates/202312.1.0/otBannerSdk.jscdn.cookielaw.org/scripttemplates/2... https://cdn.cookielaw.org/scripttemplates/202312.1.0/otBannerSdk.js — 200 — 104.2 KiB — 56 ms — h2https://cdn.cookielaw.org/consent/1afb6e77-1c88-4707-a54a-6d7af558c4ff/ea241ae7-1f19-4ae8-bfcc-c55bcc54ad40/fr.jsoncdn.cookielaw.org/consent/1afb6e77-... https://cdn.cookielaw.org/consent/1afb6e77-1c88-4707-a54a-6d7af558c4ff/ea241ae7-1f19-4ae8-bfcc-c55bcc54ad40/fr.json — 200 — 20.4 KiB — 39 ms — h2https://www.klarna.com/manifest.jsonwww.klarna.com/manifest.json https://www.klarna.com/manifest.json — 202 — 406 B — 6 ms — h3https://www.klarna.com/favicon.icowww.klarna.com/favicon.ico https://www.klarna.com/favicon.ico — 200 — 7.6 KiB — 8 ms — h3https://cdn.cookielaw.org/consent/1afb6e77-1c88-4707-a54a-6d7af558c4ff/ea241ae7-1f19-4ae8-bfcc-c55bcc54ad40/bLayout-fr.jsoncdn.cookielaw.org/consent/1afb6e77-... https://cdn.cookielaw.org/consent/1afb6e77-1c88-4707-a54a-6d7af558c4ff/ea241ae7-1f19-4ae8-bfcc-c55bcc54ad40/bLayout-fr.json — 200 — 2.8 KiB — 39 ms — h2https://cdn.cookielaw.org/scripttemplates/202312.1.0/assets/v2/otPcCenter.jsoncdn.cookielaw.org/scripttemplates/2... https://cdn.cookielaw.org/scripttemplates/202312.1.0/assets/v2/otPcCenter.json — 200 — 12.7 KiB — 29 ms — h2https://cdn.cookielaw.org/scripttemplates/202312.1.0/assets/otCommonStyles.csscdn.cookielaw.org/scripttemplates/2... https://cdn.cookielaw.org/scripttemplates/202312.1.0/assets/otCommonStyles.css — 200 — 3.9 KiB — 32 ms — h2https://cdn.cookielaw.org/logos/static/ot_close.svgcdn.cookielaw.org/logos/static/ot_c... https://cdn.cookielaw.org/logos/static/ot_close.svg — 200 — 617 B — 30 ms — 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https://widget.trustpilot.com/stats/TrustboxImpression?locale=fr-FR&styleHeight=150px&styleWidth=240px&url=https%3A%2F%2Fwww.klarna.com%2Ffr%2F%3Fgrs%3D%252F%26grr%3Dhttps%253A%252F%252Fwww.klarna.com%252F&referrer=https%3A%2F%2Fwww.klarna.com%2F&userAgent=Mozilla%2F5.0%20(Macintosh%3B%20Intel%20Mac%20OS%20X%2010_15_7)%20AppleWebKit%2F537.36%20(KHTML%2C%20like%20Gecko)%20Chrome%2F147.0.0.0%20Safari%2F537.36&language=en-US&platform=Linux%20x86_64&nosettings=1&businessUnitId=5d2f47f86653d10001fec55b&widgetId=53aa8807dec7e10d38f59f32 — 204 — 309 B — 41 ms — h2https://owp.klarna.com/38b12937d261/1be2c35156de/telemetryowp.klarna.com/38b12937d261/1be2c35... https://owp.klarna.com/38b12937d261/1be2c35156de/telemetry — 200 — 1.3 KiB — 88 ms — h3https://owp.klarna.com/38b12937d261/1be2c35156de/telemetryowp.klarna.com/38b12937d261/1be2c35... https://owp.klarna.com/38b12937d261/1be2c35156de/telemetry — 200 — 1.4 KiB — 28 ms — h3https://owp.klarna.com/38b12937d261/1be2c35156de/telemetryowp.klarna.com/38b12937d261/1be2c35... https://owp.klarna.com/38b12937d261/1be2c35156de/telemetry — 200 — 1.3 KiB — 65 ms — h3https://owp.klarna.com/38b12937d261/1be2c35156de/telemetryowp.klarna.com/38b12937d261/1be2c35... https://owp.klarna.com/38b12937d261/1be2c35156de/telemetry — 200 — 1.3 KiB — 29 ms — h3https://owp.klarna.com/38b12937d261/1be2c35156de/telemetryowp.klarna.com/38b12937d261/1be2c35... https://owp.klarna.com/38b12937d261/1be2c35156de/telemetry — 200 — 1.4 KiB — 30 ms — h3https://owp.klarna.com/38b12937d261/1be2c35156de/telemetryowp.klarna.com/38b12937d261/1be2c35... https://owp.klarna.com/38b12937d261/1be2c35156de/telemetry — 200 — 1.4 KiB — 29 ms — h3
HTML JavaScript CSS Images Fonts XHR/Fetch Other
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 1566ms · 1584KB · $21/mo
owp.klarna.com
Other
Costly
Execution 466ms
Transfer 56 KB
Monthly Cost $6/mo
owp.klarna.com
Other
Costly
Execution 283ms
Transfer 501 KB
Unused 59%
Monthly Cost $4/mo
www.klarna.com
Other
Costly
Execution 220ms
Transfer 126 KB
Monthly Cost $3/mo
Unattributable
Other
Costly
Execution 209ms
Transfer 0 KB
Monthly Cost $3/mo
38b12937d261.08d5593f.eu-west-1.token.awswaf.com
Other
Costly
Execution 201ms
Transfer 501 KB
Unused 56%
Monthly Cost $3/mo
owp.klarna.com
Other
Optional
Execution 78ms
Transfer 133 KB
Unused 47%
Monthly Cost $1/mo
Google Tag Manager
Tag Manager
Optional
Execution 56ms
Transfer 163 KB
Unused 50%
Monthly Cost $1/mo
OneTrust
Consent
Essential
Execution 53ms
Transfer 104 KB
Unused 55%
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • owp.klarna.com adds 466ms and costs ~$6/month
  • owp.klarna.com adds 283ms and costs ~$4/month
  • www.klarna.com adds 220ms and costs ~$3/month
  • Unattributable adds 209ms and costs ~$3/month
  • 38b12937d261.08d5593f.eu-west-1.token.awswaf.com adds 201ms and costs ~$3/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

owp.klarna.com takes 466ms 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

owp.klarna.com takes 283ms 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

59% of owp.klarna.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.klarna.com takes 220ms 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 209ms 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

38b12937d261.08d5593f.eu-west-1.token.awswaf.com takes 201ms 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

56% of 38b12937d261.08d5593f.eu-west-1.token.awswaf.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

55% 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

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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