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https://strato.de

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
86
GRADE
B
FIX
2
REVIEW
4
PASS
9
INFO
2

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

Mobile Desktop
61
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.

3.53 s

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

6.75 s

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

110 ms

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

0.012

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

8.27 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.

9.02 s

Page Load Progression

669 ms
1.3 s
2.0 s
2.7 s
3.3 s
4.0 s
4.7 s
5.4 s
Checks
17
9 PASS 4 REVIEW 2 FIX
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 (694.3 KiB of 694.6 KiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
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
21 images, 0 KB saveable
REVIEW
21 images, 0 KB saveable
Info::
All images are well-optimized
21 images 107 KB
0 oversized -0 KB
20 legacy format
0 missing dimensions CLS risk
C
JS Execution Cost
Action
1953ms total JS execution
REVIEW
1953ms total JS execution
Warning::
https://www.strato.de/: 725ms CPU time
Warning::
Unattributable: 551ms CPU time
Info::
https://www.strato.de/_assets/main.js: 196ms CPU time
Info::
https://js-eu1.hsforms.net/forms/embed/v2.js: 161ms CPU time
Info::
https://bbf23v.strato.de/get/live/web/_/963f4q.js: 147ms CPU time
Warning::
Third-party scripts: 1953ms (100% of total)

Main Thread Breakdown

Other 36% Script Evaluation 25% Style & Layout 22% Script Parsing & Compilation 8% Rendering 5%
ScriptTotalScriptingParse/CompileParty
https://www.strato.de/725ms16ms3ms3rd
Unattributable551ms17ms0ms3rd
https://www.strato.de/_assets/main.js196ms143ms1ms3rd
https://js-eu1.hsforms.net/forms/embed/v2.js161ms82ms79ms3rd
https://bbf23v.strato.de/get/live/web/_/963f4q.js147ms105ms41ms3rd
https://frontend-services.ionos.com/t/t/js/t.js?v=2.2.168ms34ms14ms3rd
https://widget.trustpilot.com/bootstrap/v5/tp.widget.bootstrap.min.js53ms43ms4ms3rd
https://frontend-services.ionos.com/t/ias/js/ias.js?v=6.12.1952ms37ms15ms3rd
C
JS Bundles
Action
10 scripts, 185 KB unused
REVIEW
10 scripts, 185 KB unused
Warning::
https://js-eu1.hsforms.net/forms/embed/v2.js: 114 KB unused (61%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.strato.de/_assets/main.js: 50 KB unused (62%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://bbf23v.strato.de/get/live/web/_/963f4q.js: 20 KB unused (37%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 185 KB
185 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://js-eu1.hsforms.net/forms/embed/v2.js195 KB114 KB (61%)✓3rd
https://www.strato.de/_assets/main.js82 KB50 KB (62%)✓3rd
https://bbf23v.strato.de/get/live/web/_/963f4q.js55 KB20 KB (37%)✓3rd
https://www.strato.de/_assets/setCookie.2e7644a3.js1 KB—✓3rd
https://widget.trustpilot.com/bootstrap/v5/tp.widget.bootstrap.min.js8 KB—✓3rd
https://frontend-services.ionos.com/t/tag/STRATO/shop.js8 KB—✓3rd
https://widget.trustpilot.com/trustboxes/53aa8912dec7e10d38f59f36/main.js18 KB—✓3rd
https://frontend-services.ionos.com/t/sentry/bundle.min.js21 KB—✓3rd
https://frontend-services.ionos.com/t/t/js/t.js?v=2.2.116 KB—✓3rd
https://frontend-services.ionos.com/t/ias/js/ias.js?v=6.12.1929 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

C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Page Weight Budget
695 KB transferred, 46 requests
PASS
695 KB transferred, 46 requests
Info::
Page weighs 2.2 MB (695 KB transferred)
Info::
46 HTTP requests
Info::
Estimated 0.14 g CO2 per page load
695 KB / 2.4 MB budget
695 KB transferred
46 requests
0.14 g CO2 per page load
JavaScript 433.4 KiB 62%
Images 106.6 KiB 15%
CSS 60.2 KiB 9%
Fonts 34.7 KiB 5%
HTML 29.1 KiB 4%
Other 15.4 KiB 2%
Other 12.9 KiB 2%
Other 2.3 KiB 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Under budget
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 (35 KB)
PASS
2 fonts (35 KB)
Info::
2 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

2

35 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 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s 7.0 s FCP 3.5 s LCP 6.8 shttps://www.strato.de/_assets/fonts/poppins-v23-latin-regular.woff2poppins-v23-latin-regul... https://www.strato.de/_assets/fonts/poppins-v23-latin-regular.woff2 — 8.1 KiB — 597 ms — font-display: swaphttps://www.strato.de/_assets/fonts/strato_iconfont.woff2strato_iconfont.woff2 https://www.strato.de/_assets/fonts/strato_iconfont.woff2 — 26.6 KiB — 785 ms — font-display: swap
poppins-v23-latin-regul... woff2 swap
Size 8 KB
Load time 597 ms
Start 1.9 s
Risk FOUT — text flashes from fallback to web font
strato_iconfont.woff2 woff2 swap
Size 27 KB
Load time 785 ms
Start 1.9 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
2 hints, 0 missing preconnects
PASS
2 hints, 0 missing preconnects
Info::
Page uses 2 resource hint(s)

Current Resource Hints

preconnect
—
preload
2
dns-prefetch
—
prefetch
—

2 resource hints configured

A
Page Weight Inventory
46 resources · 695 KB · 185 KB savings available
PASS
46 resources · 695 KB · 185 KB savings available
Info::
Within 1MB page-weight target
Got: 695 KB
Info::
~185 KB of savings available
Warning::
45 third-party resources (100% of weight)
46 resources · 694.6 KiB · 45 third-party Within 1MB page-weight target
JavaScript 62% · 433.4 KiB
Image 18% · 122.0 KiB
CSS 9% · 60.2 KiB
Font 5% · 34.7 KiB
Document 4% · 29.4 KiB
Other 2% · 14.8 KiB

~184.6 KiB of savings available

Remove unused JavaScript: 184.6 KiB
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
Network Waterfall
46 requests over 6869ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s 7.0 s FCP 3.5 s LCP 6.8 shttps://strato.de// https://strato.de/ — 301 — 317 B — 1.1 s — http/1.1https://www.strato.de/www.strato.de/ https://www.strato.de/ — 200 — 23.8 KiB — 989 ms — http/1.1https://www.strato.de/_assets/main.cd4ebed5.csswww.strato.de/_assets/main.cd4ebed5... https://www.strato.de/_assets/main.cd4ebed5.css — 200 — 59.4 KiB — 571 ms — http/1.1https://www.strato.de/_assets/setCookie.2e7644a3.jswww.strato.de/_assets/setCookie.2e7... https://www.strato.de/_assets/setCookie.2e7644a3.js — 200 — 893 B — 597 ms — http/1.1https://www.strato.de/_assets/fonts/poppins-v23-latin-regular.woff2www.strato.de/_assets/fonts/poppins... https://www.strato.de/_assets/fonts/poppins-v23-latin-regular.woff2 — 200 — 8.1 KiB — 597 ms — http/1.1https://www.strato.de/_assets/fonts/strato_iconfont.woff2www.strato.de/_assets/fonts/strato_... https://www.strato.de/_assets/fonts/strato_iconfont.woff2 — 200 — 26.6 KiB — 785 ms — http/1.1https://www.strato.de/img/jk7tjJrlrt-1060.webpwww.strato.de/img/jk7tjJrlrt-1060.w... https://www.strato.de/img/jk7tjJrlrt-1060.webp — 200 — 46.3 KiB — 774 ms — http/1.1https://www.strato.de/_assets/main.jswww.strato.de/_assets/main.js https://www.strato.de/_assets/main.js — 200 — 81.8 KiB — 3.0 s — http/1.1https://widget.trustpilot.com/bootstrap/v5/tp.widget.bootstrap.min.jswidget.trustpilot.com/bootstrap/v5/... https://widget.trustpilot.com/bootstrap/v5/tp.widget.bootstrap.min.js — 200 — 8.1 KiB — 15 ms — h2https://www.strato.de/_assets/img/svg/logo_strato_white_mobile.svgwww.strato.de/_assets/img/svg/logo_... https://www.strato.de/_assets/img/svg/logo_strato_white_mobile.svg — 200 — 1002 B — 217 ms — http/1.1https://frontend-services.ionos.com/t/tag/STRATO/shop.jsfrontend-services.ionos.com/t/tag/S... https://frontend-services.ionos.com/t/tag/STRATO/shop.js — 200 — 8.0 KiB — 1.4 s — h2https://www.strato.de/_assets/img/svg/navi_domain_mail.svgwww.strato.de/_assets/img/svg/navi_... https://www.strato.de/_assets/img/svg/navi_domain_mail.svg — 200 — 1.8 KiB — 199 ms — http/1.1https://www.strato.de/_assets/img/svg/navi_website_shop.svgwww.strato.de/_assets/img/svg/navi_... https://www.strato.de/_assets/img/svg/navi_website_shop.svg — 200 — 1.4 KiB — 398 ms — http/1.1https://www.strato.de/_assets/img/svg/icon_stageteaser_percent.svgwww.strato.de/_assets/img/svg/icon_... https://www.strato.de/_assets/img/svg/icon_stageteaser_percent.svg — 200 — 1.4 KiB — 342 ms — http/1.1https://www.strato.de/_assets/img/svg/seal_climate_friendly.svgwww.strato.de/_assets/img/svg/seal_... https://www.strato.de/_assets/img/svg/seal_climate_friendly.svg — 200 — 2.8 KiB — 302 ms — http/1.1https://www.strato.de/_assets/img/svg/seal_tuev_nord_iso_27001.svgwww.strato.de/_assets/img/svg/seal_... https://www.strato.de/_assets/img/svg/seal_tuev_nord_iso_27001.svg — 200 — 6.3 KiB — 313 ms — http/1.1https://widget.trustpilot.com/trustboxes/53aa8912dec7e10d38f59f36/index.html?templateId=53aa8912dec7e10d38f59f36&businessunitId=4852dabd000064000502b43fwidget.trustpilot.com/trustboxes/53... https://widget.trustpilot.com/trustboxes/53aa8912dec7e10d38f59f36/index.html?templateId=53aa8912dec7e10d38f59f36&businessunitId=4852dabd000064000502b43f — 200 — 5.4 KiB — 12 ms — h2https://widget.trustpilot.com/trustboxes/53aa8912dec7e10d38f59f36/main.jswidget.trustpilot.com/trustboxes/53... https://widget.trustpilot.com/trustboxes/53aa8912dec7e10d38f59f36/main.js — 200 — 18.4 KiB — 8 ms — h2https://widget.trustpilot.com/trustbox-data/53aa8912dec7e10d38f59f36?businessUnitId=4852dabd000064000502b43f&locale=de-DE&reviewLanguages=de&reviewStars=4%2C5&reviewTagValue=ty4us&includeReviews=1&reviewsPerPage=15&random=GiAXvqmiQVEO8krxn53Jwidget.trustpilot.com/trustbox-data... https://widget.trustpilot.com/trustbox-data/53aa8912dec7e10d38f59f36?businessUnitId=4852dabd000064000502b43f&locale=de-DE&reviewLanguages=de&reviewStars=4%2C5&reviewTagValue=ty4us&includeReviews=1&reviewsPerPage=15&random=GiAXvqmiQVEO8krxn53J — 200 — 4.6 KiB — 228 ms — h2https://widget.trustpilot.com/stats/TrustboxImpression?locale=de-DE&styleHeight=150px&styleWidth=100%25&token=f7f49b58-b19d-496e-9fcc-8817c94cf1e9&tags=ty4us&stars=4%2C5&reviewLanguages=de&fontFamily=Poppins&url=https%3A%2F%2Fwww.strato.de%2F&referrer=&userAgent=Mozilla%2F5.0%20(Linux%3B%20Android%2011%3B%20moto%20g%20power%20(2022))%20AppleWebKit%2F537.36%20(KHTML%2C%20like%20Gecko)%20Chrome%2F146.0.0.0%20Mobile%20Safari%2F537.36&language=en-US&platform=Linux%20x86_64&nosettings=1&businessUnitId=4852dabd000064000502b43f&widgetId=53aa8912dec7e10d38f59f36widget.trustpilot.com/stats/Trustbo... https://widget.trustpilot.com/stats/TrustboxImpression?locale=de-DE&styleHeight=150px&styleWidth=100%25&token=f7f49b58-b19d-496e-9fcc-8817c94cf1e9&tags=ty4us&stars=4%2C5&reviewLanguages=de&fontFamily=Poppins&url=https%3A%2F%2Fwww.strato.de%2F&referrer=&userAgent=Mozilla%2F5.0%20(Linux%3B%20Android%2011%3B%20moto%20g%20power%20(2022))%20AppleWebKit%2F537.36%20(KHTML%2C%20like%20Gecko)%20Chrome%2F146.0.0.0%20Mobile%20Safari%2F537.36&language=en-US&platform=Linux%20x86_64&nosettings=1&businessUnitId=4852dabd000064000502b43f&widgetId=53aa8912dec7e10d38f59f36 — 204 — 309 B — 191 ms — h2https://www.strato.de/_assets/img/svg/navi_hosting_wordpress.svgwww.strato.de/_assets/img/svg/navi_... https://www.strato.de/_assets/img/svg/navi_hosting_wordpress.svg — 200 — 1.0 KiB — 199 ms — http/1.1https://www.strato.de/_assets/img/svg/navi_online_marketing.svgwww.strato.de/_assets/img/svg/navi_... https://www.strato.de/_assets/img/svg/navi_online_marketing.svg — 200 — 1.8 KiB — 199 ms — http/1.1https://www.strato.de/_assets/img/svg/navi_online_speicher.svgwww.strato.de/_assets/img/svg/navi_... https://www.strato.de/_assets/img/svg/navi_online_speicher.svg — 200 — 1.1 KiB — 248 ms — http/1.1https://www.strato.de/_assets/img/svg/navi_security.svgwww.strato.de/_assets/img/svg/navi_... https://www.strato.de/_assets/img/svg/navi_security.svg — 200 — 1.4 KiB — 196 ms — http/1.1https://www.strato.de/_assets/img/svg/seal_service_champions_2025_hor.svgwww.strato.de/_assets/img/svg/seal_... https://www.strato.de/_assets/img/svg/seal_service_champions_2025_hor.svg — 200 — 11.4 KiB — 200 ms — http/1.1https://www.strato.de/_assets/img/svg/seal_hosted_in_germany.svgwww.strato.de/_assets/img/svg/seal_... https://www.strato.de/_assets/img/svg/seal_hosted_in_germany.svg — 200 — 5.2 KiB — 200 ms — http/1.1https://widget.trustpilot.com/fonts/poppins.csswidget.trustpilot.com/fonts/poppins... https://widget.trustpilot.com/fonts/poppins.css — 200 — 833 B — 7 ms — h2https://www.strato.de/_assets/img/svg/icon_hosting.svgwww.strato.de/_assets/img/svg/icon_... https://www.strato.de/_assets/img/svg/icon_hosting.svg — 200 — 1.3 KiB — 197 ms — http/1.1https://www.strato.de/_assets/img/svg/icon_webshop.svgwww.strato.de/_assets/img/svg/icon_... https://www.strato.de/_assets/img/svg/icon_webshop.svg — 200 — 1.6 KiB — 197 ms — http/1.1https://www.strato.de/_assets/img/svg/icon_server_vserver_linux.svgwww.strato.de/_assets/img/svg/icon_... https://www.strato.de/_assets/img/svg/icon_server_vserver_linux.svg — 200 — 5.1 KiB — 200 ms — http/1.1
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s 7.0 s FCP 3.5 s LCP 6.8 shttps://strato.de// https://strato.de/ — 301 — 317 B — 1.1 s — http/1.1https://www.strato.de/www.strato.de/ https://www.strato.de/ — 200 — 23.8 KiB — 989 ms — http/1.1https://www.strato.de/_assets/main.cd4ebed5.csswww.strato.de/_assets/main.cd4ebed5... https://www.strato.de/_assets/main.cd4ebed5.css — 200 — 59.4 KiB — 571 ms — http/1.1https://www.strato.de/_assets/setCookie.2e7644a3.jswww.strato.de/_assets/setCookie.2e7... https://www.strato.de/_assets/setCookie.2e7644a3.js — 200 — 893 B — 597 ms — http/1.1https://www.strato.de/_assets/fonts/poppins-v23-latin-regular.woff2www.strato.de/_assets/fonts/poppins... https://www.strato.de/_assets/fonts/poppins-v23-latin-regular.woff2 — 200 — 8.1 KiB — 597 ms — http/1.1https://www.strato.de/_assets/fonts/strato_iconfont.woff2www.strato.de/_assets/fonts/strato_... https://www.strato.de/_assets/fonts/strato_iconfont.woff2 — 200 — 26.6 KiB — 785 ms — http/1.1https://www.strato.de/img/jk7tjJrlrt-1060.webpwww.strato.de/img/jk7tjJrlrt-1060.w... https://www.strato.de/img/jk7tjJrlrt-1060.webp — 200 — 46.3 KiB — 774 ms — http/1.1https://www.strato.de/_assets/main.jswww.strato.de/_assets/main.js https://www.strato.de/_assets/main.js — 200 — 81.8 KiB — 3.0 s — http/1.1https://widget.trustpilot.com/bootstrap/v5/tp.widget.bootstrap.min.jswidget.trustpilot.com/bootstrap/v5/... https://widget.trustpilot.com/bootstrap/v5/tp.widget.bootstrap.min.js — 200 — 8.1 KiB — 15 ms — h2https://www.strato.de/_assets/img/svg/logo_strato_white_mobile.svgwww.strato.de/_assets/img/svg/logo_... https://www.strato.de/_assets/img/svg/logo_strato_white_mobile.svg — 200 — 1002 B — 217 ms — http/1.1https://frontend-services.ionos.com/t/tag/STRATO/shop.jsfrontend-services.ionos.com/t/tag/S... https://frontend-services.ionos.com/t/tag/STRATO/shop.js — 200 — 8.0 KiB — 1.4 s — h2https://www.strato.de/_assets/img/svg/navi_domain_mail.svgwww.strato.de/_assets/img/svg/navi_... https://www.strato.de/_assets/img/svg/navi_domain_mail.svg — 200 — 1.8 KiB — 199 ms — http/1.1https://www.strato.de/_assets/img/svg/navi_website_shop.svgwww.strato.de/_assets/img/svg/navi_... https://www.strato.de/_assets/img/svg/navi_website_shop.svg — 200 — 1.4 KiB — 398 ms — http/1.1https://www.strato.de/_assets/img/svg/icon_stageteaser_percent.svgwww.strato.de/_assets/img/svg/icon_... https://www.strato.de/_assets/img/svg/icon_stageteaser_percent.svg — 200 — 1.4 KiB — 342 ms — http/1.1https://www.strato.de/_assets/img/svg/seal_climate_friendly.svgwww.strato.de/_assets/img/svg/seal_... https://www.strato.de/_assets/img/svg/seal_climate_friendly.svg — 200 — 2.8 KiB — 302 ms — http/1.1https://www.strato.de/_assets/img/svg/seal_tuev_nord_iso_27001.svgwww.strato.de/_assets/img/svg/seal_... https://www.strato.de/_assets/img/svg/seal_tuev_nord_iso_27001.svg — 200 — 6.3 KiB — 313 ms — http/1.1https://widget.trustpilot.com/trustboxes/53aa8912dec7e10d38f59f36/index.html?templateId=53aa8912dec7e10d38f59f36&businessunitId=4852dabd000064000502b43fwidget.trustpilot.com/trustboxes/53... https://widget.trustpilot.com/trustboxes/53aa8912dec7e10d38f59f36/index.html?templateId=53aa8912dec7e10d38f59f36&businessunitId=4852dabd000064000502b43f — 200 — 5.4 KiB — 12 ms — h2https://widget.trustpilot.com/trustboxes/53aa8912dec7e10d38f59f36/main.jswidget.trustpilot.com/trustboxes/53... https://widget.trustpilot.com/trustboxes/53aa8912dec7e10d38f59f36/main.js — 200 — 18.4 KiB — 8 ms — h2https://widget.trustpilot.com/trustbox-data/53aa8912dec7e10d38f59f36?businessUnitId=4852dabd000064000502b43f&locale=de-DE&reviewLanguages=de&reviewStars=4%2C5&reviewTagValue=ty4us&includeReviews=1&reviewsPerPage=15&random=GiAXvqmiQVEO8krxn53Jwidget.trustpilot.com/trustbox-data... 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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 1953ms · 409KB · €9/mo
www.strato.de
Other
Costly
Execution 725ms
Transfer 24 KB
Monthly Cost €3/mo
Unattributable
Other
Costly
Execution 551ms
Transfer 0 KB
Monthly Cost €3/mo
www.strato.de
Other
Optional
Execution 196ms
Transfer 82 KB
Unused 62%
Monthly Cost €1/mo
js-eu1.hsforms.net
Other
Optional
Execution 161ms
Transfer 195 KB
Unused 61%
Monthly Cost €1/mo
bbf23v.strato.de
Other
Optional
Execution 147ms
Transfer 55 KB
Unused 37%
Monthly Cost €1/mo
frontend-services.ionos.com
Other
Optional
Execution 68ms
Transfer 16 KB
Monthly Cost €0/mo
widget.trustpilot.com
Other
Optional
Execution 53ms
Transfer 8 KB
Monthly Cost €0/mo
frontend-services.ionos.com
Other
Optional
Execution 52ms
Transfer 29 KB
Monthly Cost €0/mo

These scripts may cost more than they're worth

  • www.strato.de adds 725ms and costs ~€3/month
  • Unattributable adds 551ms 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

www.strato.de takes 725ms 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 551ms 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

62% of www.strato.de'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

61% of js-eu1.hsforms.net'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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