Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
90
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.
647 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
986 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.
0.241
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
1.25 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.
990 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
22
13 PASS6 REVIEW
B
Page Weight Budget
1.1 MB transferred, 65 requests
REVIEW
1.1 MB transferred, 65 requests
Info::
✓
Page weighs 3.2 MB (1.1 MB transferred)
Info::
i
Fonts are 303 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 303 KB
Info::
i
65 HTTP requests
Info::
i
Estimated 0.22 g CO2 per page load
1.1 MBtransferred
65 requests
0.22 g CO2 per page load
Fonts302.9 KiB28%
Images276.9 KiB26%
JavaScript258.6 KiB24%
CSS145.7 KiB14%
HTML79.3 KiB7%
Other15.2 KiB1%
02.4 MB4.9 MB
Under budget
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
B
Third-Party Impact
45% third-party, 0 ms blocking
REVIEW
45% third-party, 0 ms blocking
Info::
i
Third-party code accounts for 45% of page weight (480.2 KiB of 1.1 MiB)
Info::
✓
Third-party blocking time is low (0 ms)
55%
45%
First-party Third-party
B
Image Optimization
19 images, 0 KB saveable
REVIEW
19 images, 0 KB saveable
Info::
✓
All images are well-optimized
19images277 KB
0oversized-0 KB
5legacy format
0missing dimensionsCLS risk
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.
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW
Green Hosting
No green hosting detected
B
HTTP Caching
public, max-age=0
REVIEW
public, max-age=0
Info::
✓
Cache-Control header is set
Got: public, max-age=0
Info::
✓
Last-Modified header present
Cache-Control
public, max-age=0
Directive
Value
Meaning
public
—
Any cache may store this response
max-age
0
Cache for 0 seconds
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+
JS Execution Cost
445ms total JS execution
PASS
445ms total JS execution
Warning::
!
https://www.garagedoorproswa.com/: 378ms CPU time
Info::
i
Unattributable: 67ms CPU time
Main Thread Breakdown
Style & Layout 48% Other 23% Script Evaluation 12% Parse HTML & CSS 11% Rendering 5%
Script
Total
Scripting
Parse/Compile
Party
https://www.garagedoorproswa.com/
378ms
47ms
3ms
1st
Unattributable
67ms
2ms
0ms
1st
A+
Font Loading
4 fonts (303 KB)
PASS
4 fonts (303 KB)
Info::
i
4 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
4
303 KB total
Render-blocking
0
of 4
Dominant font-display
swap
Most common across fonts
Font loading timeline
TransferFOIT (block)FOUT (swap)
GeneralSans-Variable.ttfttfswap
Size108 KB
Load time348 ms
Start494 ms
RiskFOUT — text flashes from fallback to web font
Convert to woff2 for ~30% smaller file size
Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
fa-solid-900.woff2woff2swap
Size77 KB
Load time245 ms
Start1.0 s
RiskFOUT — text flashes from fallback to web font
OpenSans-Regular.woff2woff2swap
Size59 KB
Load time149 ms
Start2.0 s
RiskFOUT — text flashes from fallback to web font
OpenSans-Light.woff2woff2swap
Size59 KB
Load time149 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 ~87 KB and ~174 ms
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
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+
Document Compression
Document response uses brotli
PASS
Document response uses brotli
Info::
✓
Main HTML response uses brotli (Content-Encoding: br)
Brotli is the best text-compression algorithm for general use, ~20% smaller than gzip on average (40% on smaller files). Modern browsers all support it.
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
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.
No third-party or subdomain host served enough text assets to measure
Asset compression is measured per host, from one HEAD request against a sampled resource. Pages that serve all their JS and CSS from the document's own origin are covered by the document compression check instead.
Network Waterfall
65 requests over 2283ms
INFO
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Image Optimization
28 images, 16 KB total, 15 KB wasted
INFO
Image Optimization Audit
Total Images
28
Total Size
16 KB
Oversized
2
Wasted
15 KB
26 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.
