0.129 g
cleaner than an estimated 82.5% of pages on the web
- A+
- A
- B
- C
- D
- E
- F
A+ is 0.04 g or less per view, F is more than 0.359 g CO₂e.
The numbers
- 0.168 g CO₂e
- 0.012 g CO₂e
- verified green
- 444 ms
- 0.001
- 26 ms
At 10,000 views a month this page emits about 15.4 kg CO₂e a year, roughly 63 km in an average petrol car. The estimate assumes 75% new and 25% returning visitors, a measured cache reload ratio of 7%, and world-average grid intensity. How we calculate this
What to fix
apply everything → ~0.097 g/visit, rating B
Reduce JavaScript payloadsave ~0.022 g/visit (238 kB)High impact · moderate effort
58 scripts total 953 kB on the wire (2.64 MB decoded). Bundles this size usually carry a lot of unused code.
Split bundles per route, tree-shake dependencies, and audit with a bundle analyzer or coverage profile. A 25% cut is a conservative target for bundles this size.
- 5738-b5fdd0f90aa6e04a.js141 kB
- 3745.951b03bd39a76236.js73 kB
- 2543-48fde4ce9b4e8ea1.js63 kB
- 4bd1b696-44ded515d1aef393.js58 kB
- 8158.7f0fcab978d78de5.js58 kB
Enable text compressionsave ~0.0033 g/visit (36 kB)Medium impact · quick fix
2 text resources (51 kB) are served without gzip/Brotli.
Enable Brotli (or at least gzip) on the server or CDN for HTML, CSS, JavaScript, JSON and SVG. Typical reduction is ~70%.
- config26 kB
- config26 kB
Optimize web fontssave ~0.0051 g/visit (55 kB)Advisory · quick fix
2 font files total 158 kB.
Subset fonts to used glyphs, prefer one variable font over multiple weights, serve WOFF2 only, and consider system fonts for UI text.
- Inter-latin.woff281 kB
- 46bdd75a3ff56824-s.p.woff277 kB
Stop downloading the same asset twicesave ~<0.001 g/visit (8.0 kB)Advisory · quick fix
2 assets were fetched more than once in a single page load (26 kB of repeated transfer).
Usually a script injected twice or cache-busting query strings that differ per reference. Load each asset once and let the HTTP cache do its job.
- envelope2 downloads · 356 B
- config2 downloads · 51 kB
Simplify the document structureAdvisory · larger effort
The page renders 1849 DOM elements, above the 1,500 guideline. Large trees cost memory and CPU on every visitor's device.
Flatten wrapper markup, render long lists virtually or paginate, and prefer semantic elements over nested divs.
Where the bytes are
- JavaScript953 kB · 58 req
- Fonts158 kB · 2 req
- Images98 kB · 22 req
- Data (fetch)92 kB · 8 req
- CSS44 kB · 3 req
- HTML41 kB · 1 req
- Other466 B · 2 req
Ten heaviest requests
| Resource | Type | Wire size | Cache-Control |
|---|---|---|---|
| useneedle.net/_next/static/chunks/5738-b5fdd0f90aa6e04a.js | script | 141 kB | public, max-age=31536000, immutable |
| useneedle.net/fonts/Inter-latin.woff2 | font | 81 kB | public, max-age=14400, must-revalidate |
| useneedle.net/_next/static/media/46bdd75a3ff56824-s.p.woff2 | font | 77 kB | public, max-age=31536000, immutable |
| useneedle.net/_next/static/chunks/3745.951b03bd39a76236.js | script | 73 kB | public, max-age=31536000, immutable |
| useneedle.net/_next/static/chunks/2543-48fde4ce9b4e8ea1.js | script | 63 kB | public, max-age=31536000, immutable |
| useneedle.net/_next/static/chunks/4bd1b696-44ded515d1aef393.js | script | 58 kB | public, max-age=31536000, immutable |
| useneedle.net/_next/static/chunks/8158.7f0fcab978d78de5.js | script | 58 kB | public, max-age=31536000, immutable |
| app.noodleseed.com/widget/widget.js | script | 48 kB | public, max-age=0 |
| useneedle.net/_next/static/chunks/2084-1a6986f3b44fe5a4.js | script | 47 kB | public, max-age=31536000, immutable |
| useneedle.net/_next/static/chunks/4a7b0c69-828b01ce576afa55.js | script | 42 kB | public, max-age=31536000, immutable |
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<a href="https://carbonless.cc/report/useneedle.net"><img src="https://carbonless.cc/api/badge?url=https%3A%2F%2Fuseneedle.net" alt="Carbon rating for this page" width="150" height="30" loading="lazy" /></a>The badge is a lightweight SVG (under 1 kB) served with long-lived caching, so a new scan can take up to a day to show through.