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
D
Asset Compression
Action
2 of 4 asset hosts serve text uncompressed
FIX
2 of 4 asset hosts serve text uncompressed
Warning::
!
fonts.googleapis.com serves text assets uncompressed (assets: 12)
The sampled response carries a text content type but no Content-Encoding, so the bytes go over the wire raw. Text compression typically removes 70-80% of a JS or CSS payload -- this is the single cheapest transfer win available on this host.
Got: fonts.googleapis.com (text/css)
Warning::
!
fundingchoicesmessages.google.com serves text assets uncompressed (assets: 4)
The sampled response carries a text content type but no Content-Encoding, so the bytes go over the wire raw. Text compression typically removes 70-80% of a JS or CSS payload -- this is the single cheapest transfer win available on this host.
Fonts are 1.1 MB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 1.1 MB
Warning::
!
JavaScript is 770 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 770 KB
Info::
i
59 HTTP requests
Info::
i
Estimated 0.42 g CO2 per page load
2.0 MBtransferred
59 requests
0.42 g CO2 per page load
Fonts1.1 MiB56%
JavaScript770.3 KiB37%
Images46.3 KiB2%
HTML41.5 KiB2%
CSS27.1 KiB1%
Other13.6 KiB1%
Other1.2 KiB0%
Other556 B0%
02.4 MB4.9 MB
Approaching limit
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
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
B
Image Optimization
10 images, 0 KB saveable
REVIEW
10 images, 0 KB saveable
Warning::
!
https://1.bp.blogspot.com/-Pd-y9pCKl54/XQOyd3IwEII... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
10images46 KB
0oversized-0 KB
10legacy format
1missing dimensionsCLS 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
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
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::
!
1 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 4.0 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
8 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
8
1156 KB total
Render-blocking
0
of 8
Dominant font-display
swap
Most common across fonts
Font loading timeline
TransferFOIT (block)FOUT (swap)
6xK3dSBYKcSV-LCoeQqfX1R...woff2swap
Size16 KB
Load time70 ms
Start1.0 s
RiskFOUT — text flashes from fallback to web font
fa-solid-900.woff2woff2swap
Size73 KB
Load time104 ms
Start1.0 s
RiskFOUT — text flashes from fallback to web font
6xKydSBYKcSV-LCoeQqfX1R...woff2swap
Size16 KB
Load time67 ms
Start1.0 s
RiskFOUT — text flashes from fallback to web font
6xKydSBYKcSV-LCoeQqfX1R...woff2swap
Size15 KB
Load time59 ms
Start1.0 s
RiskFOUT — text flashes from fallback to web font
fa-brands-400.woff2woff2swap
Size74 KB
Load time35 ms
Start1.4 s
RiskFOUT — text flashes from fallback to web font
HhzZU5Ak9u-oMExPeInvcuE...woff2swap
Size918 KB
Load time142 ms
Start2.0 s
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
5aUp9-KzpRiLCAt4Unrc-xI...woff2swap
Size23 KB
Load time44 ms
Start2.0 s
RiskFOUT — text flashes from fallback to web font
5aUu9-KzpRiLCAt4Unrc-xI...woff2swap
Size22 KB
Load time34 ms
Start2.0 s
RiskFOUT — 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)
Fixing the unchecked items could save ~459 KB and ~918 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
13 hints, 0 missing preconnects
PASS
13 hints, 0 missing preconnects
Info::
✓
Page uses 13 resource hint(s)
Current Resource Hints
preconnect—
preload—
dns-prefetch
+3
13
prefetch—
13 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+
LCP Image Preload
LCP preload audit not available
PASS
LCP preload audit not available
Info::
✓
LCP image preload audit not available for this scan
A+
Main HTML Cache-Control
Main HTML max-age=0 (≤ 5min) is appropriate
PASS
Main HTML max-age=0 (≤ 5min) is appropriate
Info::
✓
Main HTML max-age=0 (≤ 5min) is appropriate
Got: private, max-age=0
A
Server Response Intelligence
2 server-response signal(s) detected
PASS
2 server-response signal(s) detected
Warning::
!
Compressed response missing `Vary` header
The page is served with `Content-Encoding: gzip` but has no `Vary` header. Without `Vary: Accept-Encoding`, intermediary caches (corporate proxies, ISP caches) may serve the compressed variant to clients that didn't send the matching `Accept-Encoding` -- the client sees garbled bytes. Add `Vary: Accept-Encoding` whenever the response is conditionally compressed.
Info::
✓
Both `ETag` and `Last-Modified` present -- efficient revalidation supported
The page returns both `ETag` (content hash) and `Last-Modified` (timestamp) headers. Browsers can issue conditional GETs with `If-None-Match` or `If-Modified-Since`; the server returns 304 Not Modified for unchanged content, saving bandwidth. ETag is the more reliable of the two (timestamps fail in DST transitions and clock skew).
Each `<link rel="stylesheet">` without a non-blocking `media` attribute holds up the first paint. Browsers download all of them before painting any content. Consolidate into 1-2 critical-path stylesheets; defer non-critical CSS via `<link rel="stylesheet" media="print" onload="this.media='all'">` or via the loadCSS pattern; inline above-the-fold CSS in `<style>` to short-circuit the request entirely.
Network Waterfall
59 requests over 7955ms
INFO
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
57%of JavaScript execution is third-party
First-party Third-party2258ms · 561KB · €8/mo
Script
Category
Execution
Transfer
Unused
Monthly Cost
Verdict
fundingchoicesmessages.google.com
fundingchoicesmessages.google.com
Other
723ms
84 KB
—
€3/mo
Costly
pagead2.googlesyndication.com
pagead2.googlesyndication.com
Other
357ms
56 KB
45%
€1/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
351ms
158 KB
44%
€1/mo
Costly
fundingchoicesmessages.google.com
fundingchoicesmessages.google.com
Other
343ms
72 KB
46%
€1/mo
Costly
pagead2.googlesyndication.com
pagead2.googlesyndication.com
Other
214ms
164 KB
62%
€1/mo
Costly
cdnjs
cdnjs.cloudflare.com
CDN
191ms
27 KB
—
€1/mo
Optional
fundingchoicesmessages.google.com
fundingchoicesmessages.google.com
Other
78ms
1 KB
—
€0/mo
Optional
fundingchoicesmessages.google.com
Other
Costly
Execution723ms
Transfer84 KB
Monthly Cost€3/mo
pagead2.googlesyndication.com
Other
Costly
Execution357ms
Transfer56 KB
Unused45%
Monthly Cost€1/mo
Google Tag Manager
Tag Manager
Costly
Execution351ms
Transfer158 KB
Unused44%
Monthly Cost€1/mo
fundingchoicesmessages.google.com
Other
Costly
Execution343ms
Transfer72 KB
Unused46%
Monthly Cost€1/mo
pagead2.googlesyndication.com
Other
Costly
Execution214ms
Transfer164 KB
Unused62%
Monthly Cost€1/mo
cdnjs
CDN
Optional
Execution191ms
Transfer27 KB
Monthly Cost€1/mo
fundingchoicesmessages.google.com
Other
Optional
Execution78ms
Transfer1 KB
Monthly Cost€0/mo
These scripts may cost more than they're worth
fundingchoicesmessages.google.com adds 723ms and costs ~€3/month
pagead2.googlesyndication.com adds 357ms and costs ~€1/month
Google Tag Manager adds 351ms and costs ~€1/month
fundingchoicesmessages.google.com adds 343ms and costs ~€1/month
pagead2.googlesyndication.com adds 214ms and costs ~€1/month
57% 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
fundingchoicesmessages.google.com takes 723ms 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
pagead2.googlesyndication.com takes 357ms 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 351ms 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
fundingchoicesmessages.google.com takes 343ms 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
pagead2.googlesyndication.com takes 214ms 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 pagead2.googlesyndication.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.