How does PageSourceSearch know what opensyllabus.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 opensyllabus.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 opensyllabus.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 opensyllabus.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

opensyllabus.org

Built with @clerk/ui 1.34.0, @findify/bundle 7.1.108, prismjs 1.30.0, @inkeep/cxkit-js 0.5.119, @feathery/react 2.96.0, @reachfive/identity-ui 2.1.0, @cognigy/webchat 3.50.0, tableexport.jquery.plugin 1.33.0, docsify 5.0.0, cloudflare-email-decode, @widgetbot/crate 3.9.1, @adalong/widget 7.15.1 and more. 5 pages and 161 stored files, last crawled 2026-10-02.

rank 402,887 28 libraries 0 identifiers 88 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
@findify/bundle	7.1.108	2026-10-02
prismjs	1.30.0	2026-10-02
@inkeep/cxkit-js	0.5.119	2026-10-02
@feathery/react	2.96.0	2026-10-02
@reachfive/identity-ui	2.1.0	2026-10-02
@cognigy/webchat	3.50.0	2026-10-02
tableexport.jquery.plugin	1.33.0	2026-10-02
docsify	5.0.0	2026-10-02
cloudflare-email-decode		2026-10-02
@widgetbot/crate	3.9.1	2026-10-02
@adalong/widget	7.15.1	2026-10-02
@aurolabs/auro-back-to-top	1.1.0	2026-10-02
spirhal	4.5.0	2026-10-02
@oiz/stzh-components	4.16.0	2026-10-02
@vitest/utils	5.0.2	2026-10-02
docs-searchbar.js	2.5.0	2026-10-02
@pdftron/pdfjs-express-viewer	8.7.5	2026-10-02
@sledge-app/js	2.0.114	2026-10-02
@memori.ai/memori-webcomponent	8.3.3	2026-10-02
@collectionspace/cspace-public-browser	4.0.0	2026-10-02
@accusoft/pdf-viewer	3.11.158639	2026-10-02
@ant-design/x	2.9.0	2026-10-02
@widgetti/solara-vuetify-app	10.1.1	2026-10-02
comindware.core.ui	2.1.149	2026-10-02
alist-web	3.55.0	2026-10-02
@wix/image	1.454.0	2026-10-02
@zonos/elements	1.3.289	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 opensyllabus.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
adjunctcommuterweekly.com	connect	view source
avatars.githubusercontent.com	connect	view source
blog.scottlogic.com	connect	view source
callingbullshit.org	connect	view source
chronicle.com	connect	view source
creatingdata.us	connect	view source
dailynous.com	connect	view source
dhlab.yale.edu	connect	view source
distill.pub	connect	view source
docs.google.com	connect	view source
docs.rapids.ai	connect	view source
docusaurus.io	connect	view source
duhaime.s3.amazonaws.com	connect	view source
earlyamericanists.com	connect	view source
en.wikipedia.org	connect	view source
english.stanford.edu	connect	view source
eot-su.livejournal.com	connect	view source
fonts.googleapis.com	connect	view source
freedomhouse.org	connect	view source
github.com	connect	view source
grantcuster.github.io	connect	view source
homepage.univie.ac.at	connect	view source
journals.plos.org	connect	view source
lh3.googleusercontent.com	connect	view source
lifehacker.com	connect	view source
medium.com	connect	view source
nces.ed.gov	connect	view source
ncses.nsf.gov	connect	view source
nymag.com	connect	view source
observablehq.com	connect	view source
open-syllabus.myshopify.com	connect	view source
open.umn.edu	connect	view source
openalex.org	connect	view source
opencontent.org	connect	view source
openlibrary.org	connect	view source
openstax.org	connect	view source
orcid.org	connect	view source
pair-code.github.io	connect	view source
peterbeshai.com	connect	view source
public.tableau.com	connect	view source
pudding.cool	connect	view source
qz.com	connect	view source
reactjs.org	connect	view source
ror.org	connect	view source
scatter.wordpress.com	connect	view source
schema.org	connect	view source
scholarlykitchen.sspnet.org	connect	view source
sfdora.org	connect	view source
threejsfundamentals.org	connect	view source
time.com	connect	view source
twitter.com	connect	view source
udf13.cvalla.com	connect	view source
umap-learn.readthedocs.io	connect	view source
understandingsociety.blogspot.com	connect	view source
use.typekit.net	connect	view source
vercel.live	connect	view source
webplatform.github.io	connect	view source
www.arcadiafund.org.uk	connect	view source
www.bbc.com	connect	view source
www.breitbart.com	connect	view source
www.digital-science.com	connect	view source
www.doabooks.org	connect	view source
www.elastic.co	connect	view source
www.facebook.com	connect	view source
www.ft.com	connect	view source
www.genosha.com.ar	connect	view source
www.huffingtonpost.co.uk	connect	view source
www.hyperorg.com	connect	view source
www.jstor.org	connect	view source
www.marketwatch.com	connect	view source
www.mit.edu	connect	view source
www.newyorker.com	connect	view source
www.nhmrc.gov.au	connect	view source
www.nobelprize.org	connect	view source
www.nypl.org	connect	view source
www.nytimes.com	connect	view source
www.onlinelearningsurvey.com	connect	view source
www.pbs.org	connect	view source
www.publicbooks.org	connect	view source
www.technicianonline.com	connect	view source
www.thediagram.com	connect	view source
www.thisamericanlife.org	connect	view source
www.visualcinnamon.com	connect	view source
www.vitalsource.com	connect	view source
www.w3.org	connect	view source
www.welt.de	connect	view source
www.wnycstudios.org	connect	view source
www.youtube.com	connect	view source

Stored pages and scripts

The newest stored version of each file, newest first@if (p.FilesTruncated) { (the 500 newest of 161) }. 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://blog.opensyllabus.org/assets/js/4204.5bd9d7ea.js	js	1.1 KB	2026-10-02	current
https://blog.opensyllabus.org/assets/js/1020.30b16ae2.js	js	24 KB	2026-10-02	current
https://blog.opensyllabus.org/assets/js/2651.a5cd1ea2.js	js	7.4 KB	2026-10-02	current
https://blog.opensyllabus.org/assets/js/8a11cfd8.9ee3af3a.js	js	7 KB	2026-10-02	current
https://blog.opensyllabus.org/assets/js/f6d22cd2.b5cdf6dc.js	js	8.9 KB	2026-10-02	current
https://blog.opensyllabus.org/assets/js/605caf75.42861b3e.js	js	233 B	2026-10-02	current
https://blog.opensyllabus.org/assets/js/b30fbfd0.92c27f53.js	js	11.9 KB	2026-10-02	current
https://blog.opensyllabus.org/assets/js/2e801cce.2ac5cca0.js	js	929.6 KB	2026-10-02	current
https://blog.opensyllabus.org/assets/js/44da9a24.a4f31cf3.js	js	9.5 KB	2026-10-02	current
https://blog.opensyllabus.org/assets/js/4ec5aab0.79f8b7a5.js	js	8 KB	2026-10-02	current
https://blog.opensyllabus.org/assets/js/12d633c1.b5bb2e39.js	js	5.1 KB	2026-10-02	current
https://blog.opensyllabus.org/assets/js/f75a8651.df49bbef.js	js	353 B	2026-10-02	current
https://blog.opensyllabus.org/assets/js/30f762c7.ce6c194f.js	js	5.9 KB	2026-10-02	current
https://blog.opensyllabus.org/assets/js/706af7ac.c31df133.js	js	44.2 KB	2026-10-02	current
https://blog.opensyllabus.org/assets/js/6875c492.62ac12b9.js	js	17.3 KB	2026-10-02	current
https://blog.opensyllabus.org/assets/js/7fb77748.f8ce90f7.js	js	232 B	2026-10-02	current
https://blog.opensyllabus.org/assets/js/bf2873b0.71d5b320.js	js	8.2 KB	2026-10-02	current
https://blog.opensyllabus.org/assets/js/dd690d90.903b47c9.js	js	3.6 KB	2026-10-02	current
https://blog.opensyllabus.org/assets/js/e54c4fae.ad1011dd.js	js	4.2 KB	2026-10-02	current
https://blog.opensyllabus.org/assets/js/059579d5.ce4119b0.js	js	7.6 KB	2026-10-02	current
https://blog.opensyllabus.org/assets/js/bf07073f.6f66e088.js	js	11.9 KB	2026-10-02	current
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https://blog.opensyllabus.org/assets/js/02b431dc.fd457fd0.js	js	7.9 KB	2026-10-02	current
https://blog.opensyllabus.org/assets/js/52e08897.4d5b7ebd.js	js	4.1 KB	2026-10-02	current
https://blog.opensyllabus.org/assets/js/93c87075.7cb6f12d.js	js	200 B	2026-10-02	current
https://blog.opensyllabus.org/assets/js/4f2838ea.31df6c01.js	js	3.8 KB	2026-10-02	current
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https://blog.opensyllabus.org/assets/js/8d516cbc.2e1c007b.js	js	18.1 KB	2026-10-02	current
https://blog.opensyllabus.org/assets/js/97986302.19bd804d.js	js	233 B	2026-10-02	current
https://blog.opensyllabus.org/assets/js/0bfa04de.889cc706.js	js	8.1 KB	2026-10-02	current
https://blog.opensyllabus.org/assets/js/ccc49370.b66b3946.js	js	11.8 KB	2026-10-02	current
https://blog.opensyllabus.org/assets/js/c94b0160.73693872.js	js	9.2 KB	2026-10-02	current
https://blog.opensyllabus.org/assets/js/2bb411a5.a5008c0b.js	js	3.8 KB	2026-10-02	current
https://blog.opensyllabus.org/assets/js/af6a3f1d.c5a76c0c.js	js	4.1 KB	2026-10-02	current
https://blog.opensyllabus.org/assets/js/6093f82b.1071bc39.js	js	331 B	2026-10-02	current
https://blog.opensyllabus.org/assets/js/a5557bb9.c2aa1404.js	js	322 B	2026-10-02	current
https://blog.opensyllabus.org/assets/js/08cff088.cc52a0b9.js	js	710.9 KB	2026-10-02	current
https://blog.opensyllabus.org/assets/js/01e1c857.140653e7.js	js	368 B	2026-10-02	current
https://blog.opensyllabus.org/assets/js/22754531.11cccc58.js	js	5.6 KB	2026-10-02	current
https://blog.opensyllabus.org/assets/js/b13f5a71.44dcbb73.js	js	5.4 KB	2026-10-02	current
https://blog.opensyllabus.org/assets/js/aedb19ea.1f0e1f1f.js	js	233 B	2026-10-02	current
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https://blog.opensyllabus.org/assets/js/462f0367.a773aaf8.js	js	5.2 KB	2026-10-02	current
https://blog.opensyllabus.org/assets/js/6d70e6b6.6d483775.js	js	407 B	2026-10-02	current
https://blog.opensyllabus.org/assets/js/6a263ab9.87279c57.js	js	4.2 KB	2026-10-02	current
https://blog.opensyllabus.org/assets/js/ff928426.c29111a8.js	js	4.6 KB	2026-10-02	current
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https://blog.opensyllabus.org/assets/js/39117d5a.9cb89d80.js	js	4.2 KB	2026-10-02	current
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https://blog.opensyllabus.org/assets/js/5d731d21.c8c8d0c6.js	js	8.9 KB	2026-10-02	current
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https://blog.opensyllabus.org/assets/js/a7b06f00.97fc6cad.js	js	407 B	2026-10-02	current
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https://blog.opensyllabus.org/assets/js/ac0e9f55.3d6a5eb5.js	js	233 B	2026-10-02	current
https://blog.opensyllabus.org/assets/js/3a837b29.323b91e5.js	js	407 B	2026-10-02	current
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https://blog.opensyllabus.org/assets/js/0c69e211.344f652a.js	js	18.1 KB	2026-10-02	current
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https://www.opensyllabus.org/_next/static/Kq8X5c…/_buildManifest.js	js	367 B	2026-10-02	current
https://www.opensyllabus.org/_next/static/chunks/pages/index-f8ac78b15aa690ab.js	js	95.2 KB	2026-10-02	current
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https://www.opensyllabus.org/_next/static/chunks/framework-2c79e2a64abdb08b.js	js	137.7 KB	2026-10-02	current
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https://www.opensyllabus.org/	html	91.9 KB	2026-10-02	2026-10-02

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, 161 files, 4.4 MB; 27 libraries, 0 identifiers, 88 third-party hosts
27 libraries added
- cloudflare-email-decode
- @vitest/utils 5.0.2
- tableexport.jquery.plugin 1.33.0
- comindware.core.ui 2.1.149
- @findify/bundle 7.1.108
- @aurolabs/auro-back-to-top 1.1.0
- @oiz/stzh-components 4.16.0
- docs-searchbar.js 2.5.0
- @clerk/ui 1.34.0
- @cognigy/webchat 3.50.0
- @feathery/react 2.96.0
- @sledge-app/js 2.0.114
- and 15 more
88 third-party hosts added
- vercel.live
- reactjs.org
- www.w3.org
- fonts.googleapis.com
- use.typekit.net
- www.facebook.com
- twitter.com
- open-syllabus.myshopify.com
- docusaurus.io
- webplatform.github.io
- public.tableau.com
- github.com
- and 76 more
161 files added

Questions about opensyllabus.org

How does PageSourceSearch know what opensyllabus.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 opensyllabus.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 opensyllabus.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 opensyllabus.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.