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https://babbel.com

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
81
GRADE
B
FIX
4
REVIEW
3
PASS
6
INFO
2

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

Mobile Desktop
0
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
96
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
100
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
92
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.

806 ms

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

0 ms

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

0 ms

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

0.046

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

1.17 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.

0 ms

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
6 PASS 3 REVIEW 4 FIX
D
Page Weight Budget
Action
2.4 MB transferred, 62 requests
FIX
2.4 MB transferred, 62 requests
Info::
Page weighs 3.7 MB (2.4 MB transferred)
Warning::
JavaScript is 1.1 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.1 MB
Info::
Fonts are 275 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 275 KB
Info::
62 HTTP requests
Info::
Estimated 0.49 g CO2 per page load
2.4 MB / 2.4 MB budget
2.4 MB transferred
62 requests
0.49 g CO2 per page load
JavaScript 1.1 MiB 46%
Images 944.4 KiB 39%
Fonts 274.7 KiB 11%
Other 49.5 KiB 2%
HTML 29.8 KiB 1%
Other 3.1 KiB 0%
Other 2.9 KiB 0%
CSS 1.3 KiB 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Approaching limit

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

Subset fonts to include only used characters, or switch to system font stacks.

Why this matters

Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).

Source: web.dev font loading

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 (2.4 MiB of 2.4 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
Page Weight Inventory
Action
62 resources · 2.4 MB · 0 KB savings available
FIX
62 resources · 2.4 MB · 0 KB savings available
Warning::
Page weight 1.4 MB over 1MB target
Got: 2.4 MB Expected: ≤ 1 MB
Warning::
61 third-party resources (100% of weight)
Info::
2 resources over 200KB
62 resources · 2.4 MiB · 61 third-party 1.4 MiB over 1MB target
JavaScript 46% · 1.1 MiB
Image 39% · 946.6 KiB
Font 11% · 274.7 KiB
Other 2% · 49.0 KiB
Document 1% · 29.8 KiB
CSS 0% · 5.6 KiB
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
14 images, 0 KB saveable
REVIEW
14 images, 0 KB saveable
Info::
All images are well-optimized
14 images 944 KB
0 oversized -0 KB
7 legacy format
0 missing dimensions CLS risk
B
JS Execution Cost
539ms total JS execution
REVIEW
539ms total JS execution
Info::
Unattributable: 163ms CPU time
Info::
https://www.babbel.com/: 108ms CPU time
Info::
https://www.babbel.com/edge/?id=GTM-MDD3PT: 99ms CPU time
Info::
https://www.babbel.com/ebb938fae15463c06bab6135f2c...: 91ms CPU time
Info::
https://cdn.cookielaw.org/scripttemplates/202501.2...: 78ms CPU time
Warning::
Third-party scripts: 539ms (100% of total)

Main Thread Breakdown

Script Evaluation 53% Other 19% Style & Layout 13% Script Parsing & Compilation 9% Rendering 3%
ScriptTotalScriptingParse/CompileParty
Unattributable163ms51ms0ms3rd
https://www.babbel.com/108ms5ms1ms3rd
https://www.babbel.com/edge/?id=GTM-MDD3PT99ms82ms16ms3rd
https://www.babbel.com/ebb938fae15463c06bab6135f2cf31c4e979b032/_next/static/chunks/framework-38177bb1b2417318.js91ms71ms3ms3rd
https://cdn.cookielaw.org/scripttemplates/202501.2.0/otBannerSdk.js78ms47ms14ms3rd
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
4 fonts (275 KB)
PASS
4 fonts (275 KB)
Info::
4 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

4

275 KB total

Render-blocking

0

of 4

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s FCP 806 mshttps://design-system-assets.babbel.com/fonts/graphik-babbel-lcg-regular-4c04ca457245d20e7c0ccf66bcce0516.woff2graphik-babbel-lcg-regu... https://design-system-assets.babbel.com/fonts/graphik-babbel-lcg-regular-4c04ca457245d20e7c0ccf66bcce0516.woff2 — 51.1 KiB — 110 ms — font-display: swaphttps://design-system-assets.babbel.com/fonts/graphik-babbel-lcg-semibold-77c8d3f48eb4a9b0d89e78fe2a925ed7.woff2graphik-babbel-lcg-semi... https://design-system-assets.babbel.com/fonts/graphik-babbel-lcg-semibold-77c8d3f48eb4a9b0d89e78fe2a925ed7.woff2 — 54.7 KiB — 116 ms — font-display: swaphttps://design-system-assets.babbel.com/fonts/feature-text-lc-regular-0dde0d520ae12ba873bf5f4b59ed2183.woff2feature-text-lc-regular... https://design-system-assets.babbel.com/fonts/feature-text-lc-regular-0dde0d520ae12ba873bf5f4b59ed2183.woff2 — 82.8 KiB — 125 ms — font-display: swaphttps://design-system-assets.babbel.com/fonts/feature-text-lc-regular-italic-f09b8140b1bac8faf4e2cec353b994d1.woff2feature-text-lc-regular... https://design-system-assets.babbel.com/fonts/feature-text-lc-regular-italic-f09b8140b1bac8faf4e2cec353b994d1.woff2 — 86.1 KiB — 100 ms — font-display: swap
graphik-babbel-lcg-regu... woff2 swap
Size 51 KB
Load time 110 ms
Start 391 ms
Risk FOUT — text flashes from fallback to web font
graphik-babbel-lcg-semi... woff2 swap
Size 55 KB
Load time 116 ms
Start 391 ms
Risk FOUT — text flashes from fallback to web font
feature-text-lc-regular... woff2 swap
Size 83 KB
Load time 125 ms
Start 392 ms
Risk FOUT — text flashes from fallback to web font
feature-text-lc-regular... woff2 swap
Size 86 KB
Load time 100 ms
Start 392 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+
JS Bundles
26 scripts, 0 KB unused
PASS
26 scripts, 0 KB unused
0 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://wt.babbel.com/wt/web-tools.cjs2 KB—✓3rd
https://cdn.speedcurve.com/js/lux.es2020.js?id=29596863811 KB—✓3rd
https://www.babbel.com/ebb938fae15463c06bab6135f2cf31c4e979b032/_next/static/chunks/webpack-12eddf9b673a2995.js2 KB—✓3rd
https://wt.babbel.com/mt/mt.cjs2 KB—✓3rd
https://www.babbel.com/ebb938fae15463c06bab6135f2cf31c4e979b032/_next/static/chunks/framework-38177bb1b2417318.js43 KB—✓3rd
https://www.babbel.com/ebb938fae15463c06bab6135f2cf31c4e979b032/_next/static/chunks/main-edf42876ef51ffc5.js38 KB—✓3rd
https://www.babbel.com/ebb938fae15463c06bab6135f2cf31c4e979b032/_next/static/chunks/pages/_app-2bc07254c5c4d26f.js84 KB—✓3rd
https://www.babbel.com/ebb938fae15463c06bab6135f2cf31c4e979b032/_next/static/chunks/655-64ed895341534b38.js24 KB—✓3rd
https://www.babbel.com/ebb938fae15463c06bab6135f2cf31c4e979b032/_next/static/chunks/420-8238469d9232f5b1.js21 KB—✓3rd
https://www.babbel.com/ebb938fae15463c06bab6135f2cf31c4e979b032/_next/static/chunks/329-31cfc055073c6335.js4 KB—✓3rd
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
62 requests over 1225ms
INFO
0 ms 500 ms 1.0 s FCP 806 mshttps://babbel.com// https://babbel.com/ — 307 — 344 B — 55 ms — h2https://www.babbel.com/www.babbel.com/ https://www.babbel.com/ — 200 — 29.8 KiB — 176 ms — h2https://www.babbel.com/speculation-rules.jsonwww.babbel.com/speculation-rules.js... https://www.babbel.com/speculation-rules.json — 200 — 1.1 KiB — 21 ms — h2https://wt.babbel.com/wt/web-tools.cjswt.babbel.com/wt/web-tools.cjs https://wt.babbel.com/wt/web-tools.cjs — 200 — 1.9 KiB — 57 ms — h2https://www.babbel.com/_next/image?url=https%3A%2F%2Fimages.ctfassets.net%2Fzuzqvf4m2o58%2F3DWc31d5tAEfqbUYYLoxW5%2Fd2ec91a7375c1b2bdd55df74baca9ac6%2FHero_image_ENG_Desktop__2_.png&w=1920&q=75www.babbel.com/_next/image?url=http... https://www.babbel.com/_next/image?url=https%3A%2F%2Fimages.ctfassets.net%2Fzuzqvf4m2o58%2F3DWc31d5tAEfqbUYYLoxW5%2Fd2ec91a7375c1b2bdd55df74baca9ac6%2FHero_image_ENG_Desktop__2_.png&w=1920&q=75 — 200 — 173.9 KiB — 55 ms — h2https://www.babbel.com/ebb938fae15463c06bab6135f2cf31c4e979b032/_next/static/css/80ee09d2c44b0274.csswww.babbel.com/ebb938fae15463c06bab... https://www.babbel.com/ebb938fae15463c06bab6135f2cf31c4e979b032/_next/static/css/80ee09d2c44b0274.css — 200 — 1.3 KiB — 19 ms — h2https://cdn.speedcurve.com/js/lux.es2020.js?id=295968638cdn.speedcurve.com/js/lux.es2020.js... https://cdn.speedcurve.com/js/lux.es2020.js?id=295968638 — 200 — 10.8 KiB — 31 ms — h2https://www.babbel.com/ebb938fae15463c06bab6135f2cf31c4e979b032/_next/static/chunks/webpack-12eddf9b673a2995.jswww.babbel.com/ebb938fae15463c06bab... https://www.babbel.com/ebb938fae15463c06bab6135f2cf31c4e979b032/_next/static/chunks/webpack-12eddf9b673a2995.js — 200 — 2.3 KiB — 21 ms — h3https://wt.babbel.com/mt/mt.cjswt.babbel.com/mt/mt.cjs https://wt.babbel.com/mt/mt.cjs — 200 — 1.8 KiB — 61 ms — h3https://www.babbel.com/ebb938fae15463c06bab6135f2cf31c4e979b032/_next/static/chunks/framework-38177bb1b2417318.jswww.babbel.com/ebb938fae15463c06bab... https://www.babbel.com/ebb938fae15463c06bab6135f2cf31c4e979b032/_next/static/chunks/framework-38177bb1b2417318.js — 200 — 43.0 KiB — 64 ms — h3https://www.babbel.com/ebb938fae15463c06bab6135f2cf31c4e979b032/_next/static/chunks/main-edf42876ef51ffc5.jswww.babbel.com/ebb938fae15463c06bab... https://www.babbel.com/ebb938fae15463c06bab6135f2cf31c4e979b032/_next/static/chunks/main-edf42876ef51ffc5.js — 200 — 38.4 KiB — 90 ms — h3https://www.babbel.com/ebb938fae15463c06bab6135f2cf31c4e979b032/_next/static/chunks/pages/_app-2bc07254c5c4d26f.jswww.babbel.com/ebb938fae15463c06bab... https://www.babbel.com/ebb938fae15463c06bab6135f2cf31c4e979b032/_next/static/chunks/pages/_app-2bc07254c5c4d26f.js — 200 — 83.5 KiB — 97 ms — h3https://www.babbel.com/ebb938fae15463c06bab6135f2cf31c4e979b032/_next/static/chunks/655-64ed895341534b38.jswww.babbel.com/ebb938fae15463c06bab... https://www.babbel.com/ebb938fae15463c06bab6135f2cf31c4e979b032/_next/static/chunks/655-64ed895341534b38.js — 200 — 23.7 KiB — 72 ms — h3https://www.babbel.com/ebb938fae15463c06bab6135f2cf31c4e979b032/_next/static/chunks/420-8238469d9232f5b1.jswww.babbel.com/ebb938fae15463c06bab... https://www.babbel.com/ebb938fae15463c06bab6135f2cf31c4e979b032/_next/static/chunks/420-8238469d9232f5b1.js — 200 — 20.9 KiB — 64 ms — h3https://www.babbel.com/ebb938fae15463c06bab6135f2cf31c4e979b032/_next/static/chunks/329-31cfc055073c6335.jswww.babbel.com/ebb938fae15463c06bab... https://www.babbel.com/ebb938fae15463c06bab6135f2cf31c4e979b032/_next/static/chunks/329-31cfc055073c6335.js — 200 — 3.8 KiB — 59 ms — h3https://www.babbel.com/ebb938fae15463c06bab6135f2cf31c4e979b032/_next/static/chunks/958-838e726a4c081c3e.jswww.babbel.com/ebb938fae15463c06bab... https://www.babbel.com/ebb938fae15463c06bab6135f2cf31c4e979b032/_next/static/chunks/958-838e726a4c081c3e.js — 200 — 8.0 KiB — 60 ms — h3https://www.babbel.com/ebb938fae15463c06bab6135f2cf31c4e979b032/_next/static/chunks/34-913b88672ba37623.jswww.babbel.com/ebb938fae15463c06bab... https://www.babbel.com/ebb938fae15463c06bab6135f2cf31c4e979b032/_next/static/chunks/34-913b88672ba37623.js — 200 — 4.7 KiB — 62 ms — h3https://www.babbel.com/ebb938fae15463c06bab6135f2cf31c4e979b032/_next/static/chunks/108-7078f8917a4a949c.jswww.babbel.com/ebb938fae15463c06bab... https://www.babbel.com/ebb938fae15463c06bab6135f2cf31c4e979b032/_next/static/chunks/108-7078f8917a4a949c.js — 200 — 3.2 KiB — 62 ms — h3https://www.babbel.com/ebb938fae15463c06bab6135f2cf31c4e979b032/_next/static/chunks/218-2adea324ab5dc435.jswww.babbel.com/ebb938fae15463c06bab... https://www.babbel.com/ebb938fae15463c06bab6135f2cf31c4e979b032/_next/static/chunks/218-2adea324ab5dc435.js — 200 — 7.1 KiB — 77 ms — h3https://www.babbel.com/ebb938fae15463c06bab6135f2cf31c4e979b032/_next/static/chunks/141-cbd7f7b01bd7c73a.jswww.babbel.com/ebb938fae15463c06bab... https://www.babbel.com/ebb938fae15463c06bab6135f2cf31c4e979b032/_next/static/chunks/141-cbd7f7b01bd7c73a.js — 200 — 11.9 KiB — 94 ms — h3https://www.babbel.com/ebb938fae15463c06bab6135f2cf31c4e979b032/_next/static/chunks/567-d87097866e15152d.jswww.babbel.com/ebb938fae15463c06bab... https://www.babbel.com/ebb938fae15463c06bab6135f2cf31c4e979b032/_next/static/chunks/567-d87097866e15152d.js — 200 — 11.2 KiB — 95 ms — h3https://www.babbel.com/ebb938fae15463c06bab6135f2cf31c4e979b032/_next/static/chunks/pages/index-5445590e29e5b130.jswww.babbel.com/ebb938fae15463c06bab... https://www.babbel.com/ebb938fae15463c06bab6135f2cf31c4e979b032/_next/static/chunks/pages/index-5445590e29e5b130.js — 200 — 3.5 KiB — 57 ms — h3https://www.babbel.com/ebb938fae15463c06bab6135f2cf31c4e979b032/_next/static/ebb938fae15463c06bab6135f2cf31c4e979b032/_buildManifest.jswww.babbel.com/ebb938fae15463c06bab... https://www.babbel.com/ebb938fae15463c06bab6135f2cf31c4e979b032/_next/static/ebb938fae15463c06bab6135f2cf31c4e979b032/_buildManifest.js — 200 — 1.3 KiB — 53 ms — h3https://www.babbel.com/ebb938fae15463c06bab6135f2cf31c4e979b032/_next/static/ebb938fae15463c06bab6135f2cf31c4e979b032/_ssgManifest.jswww.babbel.com/ebb938fae15463c06bab... https://www.babbel.com/ebb938fae15463c06bab6135f2cf31c4e979b032/_next/static/ebb938fae15463c06bab6135f2cf31c4e979b032/_ssgManifest.js — 200 — 698 B — 53 ms — h3https://www.babbel.com/_next/image?url=https%3A%2F%2Fimages.ctfassets.net%2Fzuzqvf4m2o58%2F6hUHNrLE3NGCxUQCHKMTM6%2F410b50aef3c40e91dbc89116ea7e0a61%2FFrame_2085662311.png&w=1920&q=75www.babbel.com/_next/image?url=http... https://www.babbel.com/_next/image?url=https%3A%2F%2Fimages.ctfassets.net%2Fzuzqvf4m2o58%2F6hUHNrLE3NGCxUQCHKMTM6%2F410b50aef3c40e91dbc89116ea7e0a61%2FFrame_2085662311.png&w=1920&q=75 — 200 — 262.8 KiB — 98 ms — h3https://www.babbel.com/_next/image?url=https%3A%2F%2Fimages.ctfassets.net%2Fzuzqvf4m2o58%2F5pKEciNveao1Ui5BesdYCk%2F4f77c2356bc987d9b3f732a987c87764%2FFrame_2085662312.png&w=1920&q=75www.babbel.com/_next/image?url=http... https://www.babbel.com/_next/image?url=https%3A%2F%2Fimages.ctfassets.net%2Fzuzqvf4m2o58%2F5pKEciNveao1Ui5BesdYCk%2F4f77c2356bc987d9b3f732a987c87764%2FFrame_2085662312.png&w=1920&q=75 — 200 — 97.8 KiB — 70 ms — h3https://www.babbel.com/_next/image?url=https%3A%2F%2Fimages.ctfassets.net%2Fzuzqvf4m2o58%2F2cY8AFxd6I0y6FpT4LoSlV%2Fac960cbc8154afedc7bef87ae12b27a2%2FFrame_2085662313.png&w=1920&q=75www.babbel.com/_next/image?url=http... https://www.babbel.com/_next/image?url=https%3A%2F%2Fimages.ctfassets.net%2Fzuzqvf4m2o58%2F2cY8AFxd6I0y6FpT4LoSlV%2Fac960cbc8154afedc7bef87ae12b27a2%2FFrame_2085662313.png&w=1920&q=75 — 200 — 129.8 KiB — 68 ms — h3https://images.ctfassets.net/zuzqvf4m2o58/6lXpdQtU0VNkgSOzwMsdXn/b67be6acdc012a8e460fb2190d3c8c7c/Medal.svgimages.ctfassets.net/zuzqvf4m2o58/6... https://images.ctfassets.net/zuzqvf4m2o58/6lXpdQtU0VNkgSOzwMsdXn/b67be6acdc012a8e460fb2190d3c8c7c/Medal.svg — 200 — 1.7 KiB — 87 ms — h2https://images.ctfassets.net/zuzqvf4m2o58/5WDMVtbMBLtu0UiMtl4Ox2/5ecebd5f91462ab23b0ed81d96b4d6bc/Lightbulb.svgimages.ctfassets.net/zuzqvf4m2o58/5... https://images.ctfassets.net/zuzqvf4m2o58/5WDMVtbMBLtu0UiMtl4Ox2/5ecebd5f91462ab23b0ed81d96b4d6bc/Lightbulb.svg — 200 — 1.7 KiB — 86 ms — h2https://images.ctfassets.net/zuzqvf4m2o58/3xzICoLIm8vwzOR6f1Zooy/ffc0079502d76d9e3241415879f3ff23/Users.svgimages.ctfassets.net/zuzqvf4m2o58/3... 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0 ms 500 ms 1.0 s FCP 806 mshttps://babbel.com// https://babbel.com/ — 307 — 344 B — 55 ms — h2https://www.babbel.com/www.babbel.com/ https://www.babbel.com/ — 200 — 29.8 KiB — 176 ms — h2https://www.babbel.com/speculation-rules.jsonwww.babbel.com/speculation-rules.js... https://www.babbel.com/speculation-rules.json — 200 — 1.1 KiB — 21 ms — h2https://wt.babbel.com/wt/web-tools.cjswt.babbel.com/wt/web-tools.cjs https://wt.babbel.com/wt/web-tools.cjs — 200 — 1.9 KiB — 57 ms — h2https://www.babbel.com/_next/image?url=https%3A%2F%2Fimages.ctfassets.net%2Fzuzqvf4m2o58%2F3DWc31d5tAEfqbUYYLoxW5%2Fd2ec91a7375c1b2bdd55df74baca9ac6%2FHero_image_ENG_Desktop__2_.png&w=1920&q=75www.babbel.com/_next/image?url=http... https://www.babbel.com/_next/image?url=https%3A%2F%2Fimages.ctfassets.net%2Fzuzqvf4m2o58%2F3DWc31d5tAEfqbUYYLoxW5%2Fd2ec91a7375c1b2bdd55df74baca9ac6%2FHero_image_ENG_Desktop__2_.png&w=1920&q=75 — 200 — 173.9 KiB — 55 ms — 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200 — 54.7 KiB — 116 ms — h2https://design-system-assets.babbel.com/fonts/feature-text-lc-regular-0dde0d520ae12ba873bf5f4b59ed2183.woff2design-system-assets.babbel.com/fon... https://design-system-assets.babbel.com/fonts/feature-text-lc-regular-0dde0d520ae12ba873bf5f4b59ed2183.woff2 — 200 — 82.8 KiB — 125 ms — h2https://design-system-assets.babbel.com/fonts/feature-text-lc-regular-italic-f09b8140b1bac8faf4e2cec353b994d1.woff2design-system-assets.babbel.com/fon... https://design-system-assets.babbel.com/fonts/feature-text-lc-regular-italic-f09b8140b1bac8faf4e2cec353b994d1.woff2 — 200 — 86.1 KiB — 100 ms — h2https://go.babbel.com/us-index-org/default.gif?dr=&pt=index%20page&dl=https%3A%2F%2Fwww.babbel.com%2F&pc=&v=4.1.3go.babbel.com/us-index-org/default.... https://go.babbel.com/us-index-org/default.gif?dr=&pt=index%20page&dl=https%3A%2F%2Fwww.babbel.com%2F&pc=&v=4.1.3 — 200 — 454 B — 230 ms — h2https://wt.babbel.com/cm/cm.jswt.babbel.com/cm/cm.js https://wt.babbel.com/cm/cm.js — 200 — 1.3 KiB — 35 ms — h3https://www.babbel.com/api/content-preview/disablewww.babbel.com/api/content-preview/... https://www.babbel.com/api/content-preview/disable — 200 — 827 B — 66 ms — h3https://cdn.cookielaw.org/scripttemplates/otSDKStub.jscdn.cookielaw.org/scripttemplates/o... https://cdn.cookielaw.org/scripttemplates/otSDKStub.js — 200 — 9.1 KiB — 67 ms — h2https://wt.babbel.com/gtm/gtm.jswt.babbel.com/gtm/gtm.js https://wt.babbel.com/gtm/gtm.js — 200 — 1.8 KiB — 20 ms — h3https://www.babbel.com/edge/?id=GTM-MDD3PTwww.babbel.com/edge/?id=GTM-MDD3PT https://www.babbel.com/edge/?id=GTM-MDD3PT — 200 — 693.5 KiB — 87 ms — h3https://api.babbel.io/gamma/v1.0.0/en/geoip/meapi.babbel.io/gamma/v1.0.0/en/geoip... https://api.babbel.io/gamma/v1.0.0/en/geoip/me — 200 — 404 B — 120 ms — h2https://api.babbel.io/gamma/v1.0.0/profile?id=90a078130b4d63fced2426cd055f30c6api.babbel.io/gamma/v1.0.0/profile?... https://api.babbel.io/gamma/v1.0.0/profile?id=90a078130b4d63fced2426cd055f30c6 — 200 — 227 B — 123 ms — h2https://wt.babbel.com/ec/ec.jswt.babbel.com/ec/ec.js https://wt.babbel.com/ec/ec.js — 200 — 2.0 KiB — 19 ms — h3https://collect.babbel.com/v1/eventscollect.babbel.com/v1/events https://collect.babbel.com/v1/events — 204 — 0 B — 129 ms — h2https://cdn.cookielaw.org/consent/76f8f301-1d03-46f3-a2dd-342d801d1864/76f8f301-1d03-46f3-a2dd-342d801d1864.jsoncdn.cookielaw.org/consent/76f8f301-... https://cdn.cookielaw.org/consent/76f8f301-1d03-46f3-a2dd-342d801d1864/76f8f301-1d03-46f3-a2dd-342d801d1864.json — 200 — 2.6 KiB — 79 ms — h2https://www.googletagmanager.com/gtm.js?id=GTM-MDD3PT&gtg_health=1www.googletagmanager.com/gtm.js?id=... https://www.googletagmanager.com/gtm.js?id=GTM-MDD3PT&gtg_health=1 — 200 — 392 B — 162 ms — h2https://collect.babbel.com/v1/eventscollect.babbel.com/v1/events https://collect.babbel.com/v1/events — 204 — 220 B — 203 ms — h2https://geolocation.onetrust.com/cookieconsentpub/v1/geo/locationgeolocation.onetrust.com/cookiecons... 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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 539ms · 881KB · €6/mo
Unattributable
Other
Optional
Execution 163ms
Transfer 0 KB
Monthly Cost €2/mo
www.babbel.com
Other
Optional
Execution 108ms
Transfer 30 KB
Monthly Cost €1/mo
www.babbel.com
Other
Optional
Execution 99ms
Transfer 693 KB
Monthly Cost €1/mo
www.babbel.com
Other
Optional
Execution 91ms
Transfer 43 KB
Monthly Cost €1/mo
OneTrust
Consent
Essential
Execution 78ms
Transfer 114 KB
Monthly Cost €1/mo

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.

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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

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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