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
B
Document Compression
Document response uses gzip; brotli would be ~20% smaller
REVIEW
Document response uses gzip; brotli would be ~20% smaller
Info::
i
Main HTML response uses gzip (brotli would be ~20% smaller)
All current browsers support brotli. Most CDNs (Cloudflare, Fastly, AWS CloudFront, Vercel, Netlify) can switch from gzip to brotli with a single config flag. Origin servers (nginx, Apache) need a brotli module compiled in -- nginx-brotli or Apache mod_brotli.
B
Main HTML Cache-Control
No Cache-Control header on main HTML response
REVIEW
No Cache-Control header on main HTML response
Info::
i
Main HTML response has no Cache-Control header
Without an explicit Cache-Control, browsers fall back to heuristic caching (~10% of Last-Modified age). Set `Cache-Control: no-cache` or `max-age=300` for HTML to control freshness explicitly -- prevents stale auth state and SPA shell drift.
B
Server-Timing Observability
No Server-Timing header found
REVIEW
No Server-Timing header found
Info::
i
No Server-Timing header found
Server-Timing exposes backend timing breakdowns to browser DevTools (e.g., `db: 45ms; render: 120ms; cache: 2ms`). Useful for diagnosing slow pages without backend log access. Most modern frameworks (Next.js, Cloudflare Workers, Fastly) emit it automatically; absence on a managed platform usually means telemetry headers are stripped at the edge.
B
JavaScript Blocking
2 JS blocking issue(s) detected
REVIEW
2 JS blocking issue(s) detected
Warning::
!
9 render-blocking <script src> tag(s) without async/defer
Each `<script src=...>` without `async`, `defer`, or `type="module"` blocks HTML parsing while the browser fetches and executes it. The block lasts the entire round-trip + execution time -- on slow networks this translates directly into LCP delay. Add `defer` (executes after parse, in source order) for scripts that interact with the DOM, or `async` (executes whenever ready) for analytics / independent scripts. Module scripts (`type="module"`) are deferred by default.
Warning::
!
Total JS execution time is 9.1 s -- over the 3.5s budget
Total JavaScript execution (parse + compile + run) across all scripts exceeds 3.5 seconds. On low-end devices that becomes 7-15+ seconds and shows up directly in TBT and INP. Reduce by: tree-shaking unused dependencies, code-splitting (dynamic `import()`), removing or deferring third-party tracking, and replacing heavy frameworks where they're not needed.
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
5 fonts (306 KB)
PASS
5 fonts (306 KB)
Info::
i
5 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
5
306 KB total
Render-blocking
0
of 5
Dominant font-display
swap
Most common across fonts
Font loading timeline
TransferFOIT (block)FOUT (swap)
69b0131b4eedd64c697832c...ttfswap
Size30 KB
Load time15 ms
Start555 ms
RiskFOUT — text flashes from fallback to web font
Convert to woff2 for ~30% smaller file size
69b0131b74a0433e9d96684...ttfswap
Size30 KB
Load time25 ms
Start555 ms
RiskFOUT — text flashes from fallback to web font
Convert to woff2 for ~30% smaller file size
69b012990a04851a1fb79ad...ttfswap
Size54 KB
Load time42 ms
Start559 ms
RiskFOUT — text flashes from fallback to web font
Convert to woff2 for ~30% smaller file size
69b012dea2f97b05edb0232...ttfswap
Size47 KB
Load time39 ms
Start562 ms
RiskFOUT — text flashes from fallback to web font
Convert to woff2 for ~30% smaller file size
Phosphor.woff2woff2swap
Size144 KB
Load time24 ms
Start904 ms
RiskFOUT — text flashes from fallback to web font
Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
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)
Fixing the unchecked items could save ~121 KB and ~242 ms
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
6 hints, 0 missing preconnects
PASS
6 hints, 0 missing preconnects
Info::
✓
Page uses 6 resource hint(s)
Current Resource Hints
preconnect
5
preload
1
dns-prefetch—
prefetch—
6 resource hints configured
A+
HTTP/3 (QUIC)
HTTP/3 advertised via Alt-Svc
PASS
HTTP/3 advertised via Alt-Svc
Info::
✓
HTTP/3 (QUIC) is supported
First-load mobile users on cellular networks see meaningful latency improvements with HTTP/3. The QUIC transport collapses TLS + TCP handshakes into one and recovers faster from packet loss.
A+
Asset Compression
All 3 asset hosts use brotli
PASS
All 3 asset hosts use brotli
Info::
✓
cdn.prod.website-files.com serves assets with brotli (assets: 35)
Got: cdn.prod.website-files.com (text/css)
Info::
✓
cdn.jsdelivr.net serves assets with brotli (assets: 4)
Got: cdn.jsdelivr.net (text/css)
Info::
✓
www.googletagmanager.com serves assets with brotli (assets: 3)
LCP image preload audit not available for this scan
A+
Server Response Intelligence
2 server-response signal(s) detected
PASS
2 server-response signal(s) detected
Info::
✓
`Vary` header declared: accept-encoding
The page declares a `Vary` header, telling downstream caches which request headers the response varies on. Critical for content-negotiated responses (compression, language, cookies, device class).
Info::
✓
`Last-Modified` present -- timestamp-based conditional GET supported
Consider also setting `ETag` for stronger revalidation -- ETags are content hashes that don't suffer from clock-skew or DST issues. Last-Modified alone is functional for conditional GETs and not a bug.
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+
CSS Performance Depth
No CSS performance depth issues detected
PASS
No CSS performance depth issues detected
Info::
✓
No CSS performance depth issues detected
Network Waterfall
99 requests over 5483ms
INFO
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
44%of JavaScript execution is third-party
First-party Third-party3970ms · 686KB · €63/mo
Script
Category
Execution
Transfer
Unused
Monthly Cost
Verdict
HubSpot Analytics
js.hs-analytics.net
Analytics
779ms
43 KB
—
€12/mo
Costly
jsDelivr
cdn.jsdelivr.net
CDN
742ms
18 KB
—
€12/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
694ms
156 KB
45%
€11/mo
Costly
Facebook Pixel
connect.facebook.net
Advertising
404ms
110 KB
34%
€6/mo
Costly
Facebook Pixel
connect.facebook.net
Advertising
302ms
91 KB
36%
€5/mo
Costly
cdn.intellimize.co
cdn.intellimize.co
Other
275ms
86 KB
66%
€4/mo
Costly
jsDelivr
cdn.jsdelivr.net
CDN
224ms
29 KB
—
€4/mo
Costly
d3e54v103j8qbb.cloudfront.net
d3e54v103j8qbb.cloudfront.net
Other
141ms
30 KB
—
€2/mo
Optional
js.hubspot.com
js.hubspot.com
Other
104ms
30 KB
—
€2/mo
Optional
js.hscollectedforms.net
js.hscollectedforms.net
Other
102ms
27 KB
—
€2/mo
Optional
www.redditstatic.com
www.redditstatic.com
Other
77ms
25 KB
—
€1/mo
Optional
LinkedIn Insight
snap.licdn.com
Advertising
73ms
21 KB
—
€1/mo
Optional
cdn.prod.website-files.com
cdn.prod.website-files.com
Other
55ms
21 KB
—
€1/mo
Optional
HubSpot Analytics
Analytics
Costly
Execution779ms
Transfer43 KB
Monthly Cost€12/mo
jsDelivr
CDN
Costly
Execution742ms
Transfer18 KB
Monthly Cost€12/mo
Google Tag Manager
Tag Manager
Costly
Execution694ms
Transfer156 KB
Unused45%
Monthly Cost€11/mo
Facebook Pixel
Advertising
Costly
Execution404ms
Transfer110 KB
Unused34%
Monthly Cost€6/mo
Facebook Pixel
Advertising
Costly
Execution302ms
Transfer91 KB
Unused36%
Monthly Cost€5/mo
cdn.intellimize.co
Other
Costly
Execution275ms
Transfer86 KB
Unused66%
Monthly Cost€4/mo
jsDelivr
CDN
Costly
Execution224ms
Transfer29 KB
Monthly Cost€4/mo
d3e54v103j8qbb.cloudfront.net
Other
Optional
Execution141ms
Transfer30 KB
Monthly Cost€2/mo
js.hubspot.com
Other
Optional
Execution104ms
Transfer30 KB
Monthly Cost€2/mo
js.hscollectedforms.net
Other
Optional
Execution102ms
Transfer27 KB
Monthly Cost€2/mo
www.redditstatic.com
Other
Optional
Execution77ms
Transfer25 KB
Monthly Cost€1/mo
LinkedIn Insight
Advertising
Optional
Execution73ms
Transfer21 KB
Monthly Cost€1/mo
cdn.prod.website-files.com
Other
Optional
Execution55ms
Transfer21 KB
Monthly Cost€1/mo
These scripts may cost more than they're worth
HubSpot Analytics adds 779ms and costs ~€12/month
jsDelivr adds 742ms and costs ~€12/month
Google Tag Manager adds 694ms and costs ~€11/month
Facebook Pixel adds 404ms and costs ~€6/month
Facebook Pixel adds 302ms and costs ~€5/month
cdn.intellimize.co adds 275ms and costs ~€4/month
jsDelivr adds 224ms and costs ~€4/month
44% of JavaScript execution time comes from third-party scripts.
Why this matters
Third-party scripts (analytics, ads, social, A/B testing) often dominate execution time — every one is a perf-and-privacy tax.
Learn more ▾▴
Each third-party script is a black box: you don't control when it loads, what it executes, or how much it grows. They often account for a major share of total blocking time on average sites (HTTP Archive's Web Almanac documents the trend). Audit which ones you actually need, defer the rest, and use facade patterns (lite-youtube, lite-vimeo) for embedded media.
Source: web.dev / HTTP Archive Web Almanac
HubSpot Analytics takes 779ms 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
jsDelivr takes 742ms 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
Google Tag Manager takes 694ms 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
Facebook Pixel takes 404ms 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
Facebook Pixel takes 302ms 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
cdn.intellimize.co takes 275ms 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
66% of cdn.intellimize.co'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
jsDelivr takes 224ms 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.