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CarbonlessBeta

0.066 g

cleaner than an estimated 91.7% of pages on the web 

  1. A+
  2. A
  3. B
  4. C
  5. D
  6. E
  7. F

A+ is 0.04 g or less per view, F is more than 0.359 g CO₂e.

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What the browser rendered, so you can confirm a real page was measured.

The numbers

594 kBcold load, on the wire
182 domains
258 kB1 requests
0 B0% re-downloaded
0.088 g CO₂e
<0.001 g CO₂e
unknown
176 ms
0.022
18 ms

At 10,000 views a month this page emits about 7.9 kg CO₂e a year, roughly 32 km in an average petrol car. The estimate assumes 75% new and 25% returning visitors, a measured cache reload ratio of 0%, and world-average grid intensity. How we calculate this

What to fix

apply everything → ~0.032 g/visit, rating A+

  1. Audit third-party servicessave ~0.014 g/visit (129 kB)Medium impact · moderate effort

    1 third-party domain account for 258 kB (43% of the page).

    Remove services that no longer earn their place; load the rest on interaction (facades for embeds, delayed consent-gated tags). Each third party is also a privacy and performance dependency.

    • cdn.jsdelivr.net258 kB
  2. Optimize web fontssave ~0.012 g/visit (109 kB)Medium impact · quick fix

    2 font files total 312 kB.

    Subset fonts to used glyphs, prefer one variable font over multiple weights, serve WOFF2 only, and consider system fonts for UI text.

    • ZedTextL-Bold.woff2167 kB
    • ZedTextL-Regular.woff2145 kB
  3. Reduce JavaScript payloadsave ~0.0075 g/visit (67 kB)Medium impact · moderate effort

    6 scripts total 270 kB on the wire (1.21 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.

    • tex-mml-chtml.js258 kB
    • searchElasticlunr.min.js8.1 kB
    • codeblock.js2.1 kB
    • toc.js889 B
    • themetoggle.js859 B
  4. Verify your hosting energyMedium impact · moderate effort

    This host has not published renewable energy evidence with the Green Web Foundation, so its energy source is unknown.

    Choose a provider listed in the Green Web Directory, or ask your current provider to publish evidence (and a carbon.txt). This cuts the data-center share of every single page view.

    • carbon.txtNo carbon.txt found at the site root; publishing one is the lightest first step.

Where the bytes are

  • Fonts312 kB · 2 req
  • JavaScript270 kB · 6 req
  • CSS6.3 kB · 5 req
  • HTML3.7 kB · 1 req
  • Images1.9 kB · 4 req
Ten heaviest requests
ResourceTypeWire sizeCache-Control
cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.jsscript258 kBpublic, max-age=604800, s-maxage=43200
mun-logadan.github.io/fonts/zed-fonts/ZedTextL-Bold.woff2font167 kBmax-age=600
mun-logadan.github.io/fonts/zed-fonts/ZedTextL-Regular.woff2font145 kBmax-age=600
mun-logadan.github.io/js/searchElasticlunr.min.js?h=3626c0ef99daa745b31escript8.1 kBmax-age=600
mun-logadan.github.io/main.cssstylesheet4.7 kBmax-age=600
mun-logadan.github.io/why-does-opus-5-feel-worse/document3.7 kBmax-age=600
mun-logadan.github.io/js/codeblock.jsscript2.1 kBmax-age=600
mun-logadan.github.io/js/toc.jsscript889 Bmax-age=600
mun-logadan.github.io/js/themetoggle.jsscript859 Bmax-age=600
mun-logadan.github.io/icons/auto.svgimage510 Bmax-age=600

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