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CarbonlessBeta

Carbon report

twitter.com

Scanned · all pages on twitter.com

0.016 g

cleaner than an estimated 98% 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

167 kBcold load, on the wire
52 domains
135 kB3 requests
30 kB18% re-downloaded
0.020 g CO₂e
0.0036 g CO₂e
verified green
308 ms
n/a
161 ms

At 10,000 views a month this page emits about 1.9 kg CO₂e a year, roughly 8 km in an average petrol car. The estimate assumes 75% new and 25% returning visitors, a measured cache reload ratio of 18%, and world-average grid intensity. How we calculate this

What to fix

apply everything → ~0.0064 g/visit, rating A+

  1. Audit third-party servicessave ~0.0065 g/visit (68 kB)Medium impact · moderate effort

    1 third-party domain account for 135 kB (81% 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.

    • abs.twimg.com135 kB
    WSG 3.5: Treat third parties the same as first parties
  2. Optimize web fontssave ~0.0046 g/visit (47 kB)Advisory · quick fix

    3 font files total 135 kB.

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

    • Chirp-Bold.ebb56aba.woff246 kB
    • Chirp-Medium.f8e2739a.woff245 kB
    • Chirp-Regular.80fda27a.woff245 kB
    WSG 2.11: Use optimized web typography
  3. Remove references to broken resourcesAdvisory · quick fix

    1 request answered 4xx/5xx on load: transfer and connections spent on nothing, on every single visit.

    Delete or fix the references (stale asset URLs, dead third-party tags). Each one is a request the page provably does not need.

    • landingHTTP 404 · 0 B
    WSG 4.4: Setup necessary error pages and redirection links

Where the bytes are

  • Fonts135 kB · 3 req
  • HTML32 kB · 1 req
  • Other0 B · 1 req
Ten heaviest requests
ResourceTypeWire sizeCache-Control
abs.twimg.com/responsive-web/client-web/Chirp-Bold.ebb56aba.woff2font46 kBn/a
abs.twimg.com/responsive-web/client-web/Chirp-Medium.f8e2739a.woff2font45 kBn/a
abs.twimg.com/responsive-web/client-web/Chirp-Regular.80fda27a.woff2font45 kBn/a
twitter.com/document32 kBno-cache, private, must-revalidate, pre-check=0, post-check=0
twitter.com/i/jfapi/onboarding/web/landingother0 Bno-cache, private, must-revalidate, pre-check=0, post-check=0

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<a href="https://carbonless.cc/report/twitter.com"><img src="https://carbonless.cc/api/badge?url=https%3A%2F%2Ftwitter.com" 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.