Carbon report
en.wikipedia.org/wiki/Main_Page
Scanned · all pages on en.wikipedia.org
Redirected here by the site from en.wikipedia.org
0.065 g
cleaner than an estimated 91.8% 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
- 0.083 g CO₂e
- 0.0083 g CO₂e
- unknown
- 260 ms
- 0.001
- 13 ms
At 10,000 views a month this page emits about 7.8 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 10%, and world-average grid intensity. How we calculate this
What to fix
apply everything → ~0.049 g/visit, rating A
Reduce JavaScript payloadsave ~0.0081 g/visit (71 kB)Medium impact · moderate effort
8 scripts total 282 kB on the wire (1.14 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.
- load.php198 kB
- load.php29 kB
- load.php23 kB
- load.php18 kB
- load.php8.1 kB
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.
Upgrade compression beyond gzipsave ~0.0075 g/visit (65 kB)Advisory · quick fix
433 kB of text ships gzip-compressed; Brotli or Zstandard would cut roughly another 15-20%, and browsers without them fall back to gzip automatically.
Serve precompressed Brotli for static text assets (highest level, compressed at build time) and enable Brotli or zstd for dynamic responses; keep gzip only as the fallback.
- load.php198 kB
- en.wikipedia.org56 kB
- enwiki-25.svg45 kB
- load.php29 kB
- load.php25 kB
Remove the entry redirectAdvisory · quick fix
The address that was scanned goes through 1 redirect before the document is served, ending at https://en.wikipedia.org/wiki/Main_Page. Every hop is a full round trip on a connection that has not warmed up yet.
Point links, sitemaps and canonical tags at the final address, and make the host redirect in one hop rather than chaining http to https to www.
- https://en.wikipedia.org/redirects to https://en.wikipedia.org/wiki/Main_Page
Simplify the document structureAdvisory · larger effort
The page renders 2356 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
- JavaScript282 kB · 8 req
- Images197 kB · 27 req
- HTML56 kB · 1 req
- CSS28 kB · 2 req
Ten heaviest requests
| Resource | Type | Wire size | Cache-Control |
|---|---|---|---|
| en.wikipedia.org/w/load.php?lang=en&modules=ext.centralNotice.bannerHistoryLogger%2CchoiceData%2Cdisplay%2CgeoIP%2CimpressionDiet%2CkvStore%2ClargeBannerLimit%2ClegacySupport%2CstartUp%7Cext.centralauth.centralautologin%7Cext.checkUser.clientHints%7Cext.cx.eventlogging.campaigns%7Cext.echo.centralauth%7Cext.eventLogging%2CnavigationTiming%2Cpopups%2CtestKitchen%2CwikimediaEvents%7Cext.eventLogging.metricsPlatform%7Cext.parsermigration.reportbug.init%7Cext.uls.interface%2Cpreferences%2Cwebfonts%7Cext.urlShortener.toolbar%7Cext.wikimediaEvents.testKitchen%7Cjquery%2Coojs%2Csite%7Cjquery.client%2CtextSelection%7Cmediawiki.String%2CTitle%2Capi%2Cbase%2Ccldr%2Ccookie%2Cexperiments%2CjqueryMsg%2Clanguage%2Crouter%2Cstorage%2Cuser%2Cutil%2CvisibleTimeout%7Cmediawiki.editfont.styles%7Cmediawiki.libs.pluralruleparser%7Cmediawiki.page.ready%7Cmediawiki.page.watch.ajax%7Cmmv.bootstrap%2Ccodex%7Cskins.vector.clientPreferences%2Cjs%7Cskins.vector.icons.js%7Cwikibase.client.vector-2022%7Cwikibase.databox.fromWikidata&skin=vector-2022&version=vqclh | script | 198 kB | public, max-age=2592000, s-maxage=2592000, stale-while-revalidate=60 |
| en.wikipedia.org/ | document | 56 kB | private, s-maxage=0, max-age=0, must-revalidate, no-transform |
| en.wikipedia.org/static/images/icons/enwiki-25.svg | image | 45 kB | max-age=31536000 |
| upload.wikimedia.org/wikipedia/commons/thumb/7/75/Willa_Beatrice_Player_-_From_the_archives_of_The_Crisis.jpg/330px-Willa_Beatrice_Player_-_From_the_archives_of_The_Crisis.jpg?utm_source=en.wikipedia.org&utm_campaign=parser&utm_content=thumbnail | image | 43 kB | n/a |
| en.wikipedia.org/w/load.php?lang=en&modules=ext.centralauth.ForeignApi%7Cext.cite.referencePreviews%7Cext.math.popup%7Cext.popups.main%7Cmediawiki.ForeignApi%7Cmediawiki.ForeignApi.core&skin=vector-2022&version=10vni | script | 29 kB | public, max-age=2592000, s-maxage=2592000, stale-while-revalidate=60 |
| en.wikipedia.org/w/load.php?lang=en&modules=ext.uls.interlanguage%7Cext.visualEditor.desktopArticleTarget.noscript%7Cext.wikimediamessages.styles%7Cmediawiki.skinning.content.parsoid%7Cmediawiki.skins.legacy%7Cskins.vector.icons%2Cstyles%7Cskins.vector.search.codex.styles%7Cwikibase.client.init&only=styles&skin=vector-2022 | stylesheet | 25 kB | public, max-age=300, s-maxage=300, stale-while-revalidate=60 |
| en.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=vector-2022 | script | 23 kB | public, max-age=300, s-maxage=300, stale-while-revalidate=60 |
| upload.wikimedia.org/wikipedia/commons/thumb/9/94/Wild_Australia_Show_1892_card.jpg/250px-Wild_Australia_Show_1892_card.jpg?utm_source=en.wikipedia.org&utm_campaign=parser&utm_content=thumbnail | image | 20 kB | n/a |
| en.wikipedia.org/w/load.php?lang=en&modules=ext.visualEditor.core.utils.parsing%7Cext.visualEditor.desktopArticleTarget.init%7Cext.visualEditor.progressBarWidget%2CsupportCheck%2CtargetLoader%2CtempWikitextEditorWidget%2Ctrack%2Cve&skin=vector-2022&version=1mgca | script | 18 kB | public, max-age=2592000, s-maxage=2592000, stale-while-revalidate=60 |
| upload.wikimedia.org/wikipedia/commons/thumb/c/c8/Broad_Peak_in_July_2006.jpg/250px-Broad_Peak_in_July_2006.jpg?utm_source=en.wikipedia.org&utm_campaign=parser&utm_content=thumbnail | image | 17 kB | n/a |
Share this report
<a href="https://carbonless.cc/report/en.wikipedia.org/wiki/Main_Page"><img src="https://carbonless.cc/api/badge?url=https%3A%2F%2Fen.wikipedia.org%2Fwiki%2FMain_Page" 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.