How does PageSourceSearch know what carbonplan.org is built with?

From the site's own source code. The crawler stores the exact bytes of its pages and first-party scripts; the libraries are recognised by fingerprinting that code against known releases, the identifiers are read out of the tag snippets, and the third-party hosts are the script, iframe and stylesheet sources in the HTML and the absolute URLs inside the scripts. Nothing is inferred from headers or guessed.

How far back does the history of carbonplan.org go?

To the first crawl the timeline lists. Every crawl records what the site looked like; when a file's content changes, its earlier version stays viewable because the stored chunks are never deleted, only mapped. A crawl that finds a file unchanged adds no copy.

Can I see an older version of a script from carbonplan.org?

Yes. In the stored files list, every date under a file opens the version that was live at that crawl, with the same viewer as the current one. The raw bytes can be downloaded from there.

Which other websites use the same tracking IDs as carbonplan.org?

Each identifier links to its reverse lookup, the list of every site in the index whose source carries the same id: the sites one analytics property or tag manager container is shared across.

Site profile

carbonplan.org

Built with @clerk/ui 1.34.0, dashjs 5.2.1, @reachfive/identity-core 1.42.0, @reachfive/identity-ui 2.1.0, jspdf 4.2.1, @cognigy/webchat 3.50.0, @brainfish-ai/nudge-widget 0.1.3, @adalong/widget 7.15.1, ovenplayer 0.10.54, graphql-playground-react 1.7.28, @recogito/annotorious 2.7.14, @zephr/browser 1.9.1. 5 pages and 211 stored files, last crawled 2026-10-02.

rank 392,070 12 libraries 0 identifiers 115 third-party hosts 1 crawl open the site

Technologies and libraries

Recognised by fingerprinting the stored files and bundles against known releases; a version is the release the bytes match.

Library	Version	Seen
@clerk/ui	1.34.0	2026-10-02
dashjs	5.2.1	2026-10-02
@reachfive/identity-core	1.42.0	2026-10-02
@reachfive/identity-ui	2.1.0	2026-10-02
jspdf	4.2.1	2026-10-02
@cognigy/webchat	3.50.0	2026-10-02
@brainfish-ai/nudge-widget	0.1.3	2026-10-02
@adalong/widget	7.15.1	2026-10-02
ovenplayer	0.10.54	2026-10-02
graphql-playground-react	1.7.28	2026-10-02
@recogito/annotorious	2.7.14	2026-10-02
@zephr/browser	1.9.1	2026-09-24

Tracking, tag and verification IDs

No analytics property, tag manager container, pixel or site-verification token was found in the stored source.

Third-party hosts

Hosts outside carbonplan.org that its pages load scripts, frames or stylesheets from, and that its own scripts name in absolute URLs (connect). Each links to every site loading from the same host.

Host	Loaded as	Found in
alaskapublic.org	connect	view source
apnews.com	connect	view source
calmatters.org	connect	view source
capitalandmain.com	connect	view source
capitolweekly.net	connect	view source
carbon-pulse.com	connect	view source
cdrprimer.org	connect	view source
chinadialogue.net	connect	view source
dcs.megaphone.fm	connect	view source
dialogue.earth	connect	view source
doi.org	connect	view source
e360.yale.edu	connect	view source
edition.cnn.com	connect	view source
eos.org	connect	view source
fonts.googleapis.com	connect	view source
fonts.gstatic.com	connect	view source
fortune.com	connect	view source
github.com	connect	view source
grist.org	connect	view source
heatmap.news	connect	view source
insideclimatenews.org	connect	view source
interactive.carbonbrief.org	connect	view source
jacobin.com	connect	view source
journalistsresource.org	connect	view source
longreads.trust.org	connect	view source
newrepublic.com	connect	view source
news.trust.org	connect	view source
nowthisnews.com	connect	view source
nymag.com	connect	view source
oglobo.globo.com	connect	view source
open.spotify.com	connect	view source
oregoncapitalchronicle.com	connect	view source
ossforclimate.sustainoss.org	connect	view source
plausible.io	connect	view source
podcasts.apple.com	connect	view source
prospect.org	connect	view source
quifinanza.it	connect	view source
reactjs.org	connect	view source
rollcall.com	connect	view source
slate.com	connect	view source
ssir.org	connect	view source
subscriber.politicopro.com	connect	view source
sustainable-carbon-cycles-conference.b2match.io	connect	view source
talkpython.fm	connect	view source
thehill.com	connect	view source
time.com	connect	view source
trellis.net	connect	view source
use.typekit.net	connect	view source
vercel.live	connect	view source
vitals.vercel-insights.com	connect	view source
www.adirondackexplorer.org	connect	view source
www.axios.com	connect	view source
www.bbc.com	connect	view source
www.bloomberg.com	connect	view source
www.bostonglobe.com	connect	view source
www.businessinsider.com	connect	view source
www.buzzsprout.com	connect	view source
www.canarymedia.com	connect	view source
www.cbc.ca	connect	view source
www.cbs.com	connect	view source
www.chicagotribune.com	connect	view source
www.city-journal.org	connect	view source
www.climatechangenews.com	connect	view source
www.cnbc.com	connect	view source
www.cnn.com	connect	view source
www.columbian.com	connect	view source
www.context.news	connect	view source
www.eenews.net	connect	view source
www.fastcompany.com	connect	view source
www.ft.com	connect	view source
www.garp.org	connect	view source
www.greenbiz.com	connect	view source
www.iif.com	connect	view source
www.inc.com	connect	view source
www.kgw.com	connect	view source
www.latimes.com	connect	view source
www.ledevoir.com	connect	view source
www.marketplace.org	connect	view source
www.mckinsey.com	connect	view source
www.mprnews.org	connect	view source
www.nationalgeographic.com	connect	view source
www.nature.com	connect	view source
www.nbcbayarea.com	connect	view source
www.newscientist.com	connect	view source
www.npr.org	connect	view source
www.nytimes.com	connect	view source
www.nzz.ch	connect	view source
www.opb.org	connect	view source
www.osul.com.br	connect	view source
www.politico.com	connect	view source
www.popsci.com	connect	view source
www.propublica.org	connect	view source
www.protocol.com	connect	view source
www.publicnewsservice.org	connect	view source
www.pythonpodcast.com	connect	view source
www.reuters.com	connect	view source
www.rollingstone.com	connect	view source
www.sacbee.com	connect	view source
www.sctimes.com	connect	view source
www.seattletimes.com	connect	view source
www.straitstimes.com	connect	view source
www.technologyreview.com	connect	view source
www.theatlantic.com	connect	view source
www.theguardian.com	connect	view source
www.thejot.net	connect	view source
www.theverge.com	connect	view source
www.vice.com	connect	view source
www.volts.wtf	connect	view source
www.w3.org	connect	view source
www.washingtonpost.com	connect	view source
www.wsj.com	connect	view source
www.yahoo.com	connect	view source
www.yournec.org	connect	view source
www.youtube.com	connect	view source
youtu.be	connect	view source

Stored pages and scripts

The newest stored version of each file, newest first@if (p.FilesTruncated) { (the 500 newest of 211) }. Versions are the crawls at which the file was new or its content changed; each opens the file as it was then, rebuilt from the same stored chunks.

File	Kind	Size	Collected	Versions
https://carbonplan.org/js/script.exclusions.file-downloads.manual.js	js	3.4 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.hash.manual.outbound-links.js	js	3.1 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.hash…anual.outbound-links.revenue.js	js	3.2 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.manual.outbound-links.revenue.js	js	3.1 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.hash…utbound-links.pageview-props.js	js	3.3 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.hash…links.pageview-props.revenue.js	js	3.3 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.manu…utbound-links.pageview-props.js	js	3.3 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.manu…links.pageview-props.revenue.js	js	3.3 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.hash…-links.revenue.tagged-events.js	js	4.3 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.hash…outbound-links.tagged-events.js	js	4.1 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.hash…pageview-props.tagged-events.js	js	4.3 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.manu…-links.revenue.tagged-events.js	js	4.3 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.hash…-props.revenue.tagged-events.js	js	4.5 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.manu…-props.revenue.tagged-events.js	js	4.4 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.manu…pageview-props.tagged-events.js	js	4.3 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.manu…outbound-links.tagged-events.js	js	4.1 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.file…s.hash.manual.outbound-links.js	js	3.6 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.file…anual.outbound-links.revenue.js	js	3.6 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.file…anual.outbound-links.revenue.js	js	3.6 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.file…utbound-links.pageview-props.js	js	3.8 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.file…links.pageview-props.revenue.js	js	3.8 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.file…links.pageview-props.revenue.js	js	3.8 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.file…utbound-links.pageview-props.js	js	3.7 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.file…outbound-links.tagged-events.js	js	4.5 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.file…-links.revenue.tagged-events.js	js	4.7 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.file…pageview-props.tagged-events.js	js	4.7 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.file…-links.revenue.tagged-events.js	js	4.7 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.file…-props.revenue.tagged-events.js	js	4.9 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.file…-props.revenue.tagged-events.js	js	4.9 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.file…pageview-props.tagged-events.js	js	4.7 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.file…outbound-links.tagged-events.js	js	4.5 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.file…nloads.manual.outbound-links.js	js	3.5 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.manual.outbound-links.js	js	3.1 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.manual.js	js	2.6 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.hash.local.js	js	2.7 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.hash.local.revenue.js	js	2.8 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.hash.local.pageview-props.js	js	2.9 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.local.revenue.js	js	2.9 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.hash.local.pageview-props.revenue.js	js	2.9 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.local.pageview-props.revenue.js	js	3 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.local.pageview-props.js	js	3 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.hash.local.tagged-events.js	js	4 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.hash.local.revenue.tagged-events.js	js	4.2 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.local.revenue.tagged-events.js	js	4.3 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.hash…pageview-props.tagged-events.js	js	4.2 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.hash…-props.revenue.tagged-events.js	js	4.4 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.loca…-props.revenue.tagged-events.js	js	4.5 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.loca…pageview-props.tagged-events.js	js	4.3 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.local.tagged-events.js	js	4.1 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.file-downloads.hash.local.js	js	3.5 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.file-downloads.hash.local.revenue.js	js	3.6 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.file-downloads.local.revenue.js	js	3.7 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.file…ds.hash.local.pageview-props.js	js	3.7 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.file…local.pageview-props.revenue.js	js	3.8 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.file…local.pageview-props.revenue.js	js	3.9 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.file…wnloads.local.pageview-props.js	js	3.8 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.file…ads.hash.local.tagged-events.js	js	4.5 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.file….local.revenue.tagged-events.js	js	4.7 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.file….local.revenue.tagged-events.js	js	4.8 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.file…pageview-props.tagged-events.js	js	4.7 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.file…-props.revenue.tagged-events.js	js	4.9 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.file…-props.revenue.tagged-events.js	js	5 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.file…pageview-props.tagged-events.js	js	4.8 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.file…ownloads.local.tagged-events.js	js	4.6 KB	2026-10-02	current
https://carbonplan.org/js/script.file-downloads.outbound-links.js	js	3.7 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.file-downloads.local.js	js	3.6 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.hash.local.outbound-links.js	js	3.2 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.hash.local.outbound-links.revenue.js	js	3.3 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.local.outbound-links.revenue.js	js	3.4 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.hash…utbound-links.pageview-props.js	js	3.4 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.hash…links.pageview-props.revenue.js	js	3.4 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.loca…utbound-links.pageview-props.js	js	3.5 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.loca…links.pageview-props.revenue.js	js	3.5 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.hash…outbound-links.tagged-events.js	js	4.2 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.hash…-links.revenue.tagged-events.js	js	4.4 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.loca…-links.revenue.tagged-events.js	js	4.5 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.hash…pageview-props.tagged-events.js	js	4.4 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.hash…-props.revenue.tagged-events.js	js	4.6 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.loca…-props.revenue.tagged-events.js	js	4.7 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.loca…pageview-props.tagged-events.js	js	4.5 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.loca…outbound-links.tagged-events.js	js	4.3 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.file…ds.hash.local.outbound-links.js	js	3.7 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.file…local.outbound-links.revenue.js	js	3.7 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.file…local.outbound-links.revenue.js	js	3.8 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.file…utbound-links.pageview-props.js	js	3.8 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.file…links.pageview-props.revenue.js	js	3.9 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.file…links.pageview-props.revenue.js	js	4 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.file…utbound-links.pageview-props.js	js	3.9 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.file…outbound-links.tagged-events.js	js	4.6 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.file…-links.revenue.tagged-events.js	js	4.8 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.file…-links.revenue.tagged-events.js	js	4.9 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.file…pageview-props.tagged-events.js	js	4.8 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.file…-props.revenue.tagged-events.js	js	5 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.file…-props.revenue.tagged-events.js	js	5.1 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.file…pageview-props.tagged-events.js	js	4.9 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.file…outbound-links.tagged-events.js	js	4.7 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.file…wnloads.local.outbound-links.js	js	3.8 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.local.outbound-links.js	js	3.3 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.hash.local.manual.js	js	2.4 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.hash.local.manual.revenue.js	js	2.4 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.local.manual.revenue.js	js	2.4 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.hash.local.manual.pageview-props.js	js	2.6 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.hash…anual.pageview-props.revenue.js	js	2.6 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.loca…anual.pageview-props.revenue.js	js	2.6 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.local.manual.pageview-props.js	js	2.5 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.hash.local.manual.tagged-events.js	js	3.7 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.hash…manual.revenue.tagged-events.js	js	3.9 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.loca…manual.revenue.tagged-events.js	js	3.9 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.hash…pageview-props.tagged-events.js	js	3.9 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.hash…-props.revenue.tagged-events.js	js	4.1 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.loca…-props.revenue.tagged-events.js	js	4 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.loca…pageview-props.tagged-events.js	js	3.8 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.local.manual.tagged-events.js	js	3.7 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.file-downloads.hash.local.manual.js	js	3.2 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.file…ds.hash.local.manual.revenue.js	js	3.2 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.file…wnloads.local.manual.revenue.js	js	3.2 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.file….local.manual.pageview-props.js	js	3.4 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.file…anual.pageview-props.revenue.js	js	3.4 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.file…anual.pageview-props.revenue.js	js	3.4 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.file….local.manual.pageview-props.js	js	3.3 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.file…h.local.manual.tagged-events.js	js	4.2 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.file…manual.revenue.tagged-events.js	js	4.4 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.file…manual.revenue.tagged-events.js	js	4.3 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.file…-props.revenue.tagged-events.js	js	4.5 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.file…pageview-props.tagged-events.js	js	4.3 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.file…-props.revenue.tagged-events.js	js	4.5 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.file…pageview-props.tagged-events.js	js	4.3 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.file…s.local.manual.tagged-events.js	js	4.1 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.file-downloads.local.manual.js	js	3.1 KB	2026-10-02	current
https://carbonplan.org/js/script.exclusions.hash.local.manual.outbound-links.js	js	2.9 KB	2026-10-02	current
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Timeline

One entry per crawl, newest first, with what changed since the crawl before: libraries, identifiers, third-party hosts and files. Historical versions stay viewable because the stored chunks are shared between versions, never copied.

2026-10-02 first crawl

5 pages, 200 files, 3.9 MB; 11 libraries, 0 identifiers, 115 third-party hosts
11 libraries added
- jspdf 4.2.1
- @reachfive/identity-core 1.42.0
- @reachfive/identity-ui 2.1.0
- ovenplayer 0.10.54
- @recogito/annotorious 2.7.14
- dashjs 5.2.1
- graphql-playground-react 1.7.28
- @clerk/ui 1.34.0
- @cognigy/webchat 3.50.0
- @adalong/widget 7.15.1
- @brainfish-ai/nudge-widget 0.1.3
115 third-party hosts added
- github.com
- vercel.live
- reactjs.org
- www.w3.org
- vitals.vercel-insights.com
- fonts.googleapis.com
- fonts.gstatic.com
- use.typekit.net
- plausible.io
- edition.cnn.com
- www.bloomberg.com
- www.politico.com
- and 103 more
200 files added

Questions about carbonplan.org

How does PageSourceSearch know what carbonplan.org is built with?: From the site's own source code. The crawler stores the exact bytes of its pages and first-party scripts; the libraries are recognised by fingerprinting that code against known releases, the identifiers are read out of the tag snippets, and the third-party hosts are the script, iframe and stylesheet sources in the HTML and the absolute URLs inside the scripts. Nothing is inferred from headers or guessed.
How far back does the history of carbonplan.org go?: To the first crawl the timeline lists. Every crawl records what the site looked like; when a file's content changes, its earlier version stays viewable because the stored chunks are never deleted, only mapped. A crawl that finds a file unchanged adds no copy.
Can I see an older version of a script from carbonplan.org?: Yes. In the stored files list, every date under a file opens the version that was live at that crawl, with the same viewer as the current one. The raw bytes can be downloaded from there.
Which other websites use the same tracking IDs as carbonplan.org?: Each identifier links to its reverse lookup, the list of every site in the index whose source carries the same id: the sites one analytics property or tag manager container is shared across.

Look up another site, browse sites by tracking ID, third-party host or technology. Site owners: see the crawler page for how stored pages are removed.