How does PageSourceSearch know what castin.io 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 castin.io 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 castin.io?

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 castin.io?

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

castin.io

Built with gtag, @clerk/ui 1.34.0, firebase 12.19.0, dashjs 5.2.1, heic2any 0.0.4, @marimo-team/frontend 0.25.0, @inkeep/cxkit-js 0.5.119, @feathery/react 2.96.0, recaptcha, @reachfive/identity-core 1.42.0, @reachfive/identity-ui 2.1.0, jspdf 4.2.1 and more. 1 page and 114 stored files, last crawled 2026-10-08.

rank 14,257,175 26 libraries 0 identifiers 40 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
gtag		2026-10-08
@clerk/ui	1.34.0	2026-10-08
firebase	12.19.0	2026-10-08
dashjs	5.2.1	2026-10-08
heic2any	0.0.4	2026-10-08
@marimo-team/frontend	0.25.0	2026-10-08
@inkeep/cxkit-js	0.5.119	2026-10-08
@feathery/react	2.96.0	2026-10-08
recaptcha		2026-10-08
@reachfive/identity-core	1.42.0	2026-10-08
@reachfive/identity-ui	2.1.0	2026-10-08
jspdf	4.2.1	2026-10-08
google-apis		2026-10-08
@desivocal/agents-cdn	1.0.21	2026-10-08
@stlite/mountable	0.75.0	2026-10-08
ovenplayer	0.10.54	2026-10-08
graphql-playground-react	1.7.28	2026-10-08
@recogito/annotorious	2.7.14	2026-10-08
@pdftron/webviewer	12.1.0	2026-10-08
@pdftron/pdfjs-express-viewer	8.7.5	2026-10-08
@stytch/vanilla-js	6.3.0	2026-10-08
@tsocial/tvweb-sdk	5.38.6	2026-10-08
@okta/okta-signin-widget	7.49.1	2026-10-08
comindware.core.ui	2.1.149	2026-10-08
alist-web	3.55.0	2026-10-08
@twinalyze/web-analytics	1.0.26	2026-10-08

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 castin.io 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
api.allorigins.win	connect	view source
api.iconify.design	connect	view source
api.simplesvg.com	connect	view source
api.unisvg.com	connect	view source
api.whatsapp.com	connect	view source
apis.google.com	connect	view source
castinprodpublic.s3.ap-south-1.amazonaws.com	connect	view source
cdn.jsdelivr.net	stylesheet connect	view source
cdnjs.cloudflare.com	stylesheet connect	view source
connect.ok.ru	connect	view source
drive.google.com	connect	view source
firebase.googleapis.com	connect	view source
firebaseinstallations.googleapis.com	connect	view source
fonts.cdnfonts.com	stylesheet connect	view source
fonts.googleapis.com	stylesheet connect	view source
fonts.gstatic.com	connect	view source
github.com	connect	view source
i.pravatar.cc	connect	view source
img.youtube.com	connect	view source
linktr.ee	connect	view source
mui.com	connect	view source
picsum.photos	connect	view source
publish.twitter.com	connect	view source
quilljs.com	connect	view source
react.dev	connect	view source
schema.org	connect	view source
securetoken.google.com	connect	view source
telegram.me	connect	view source
twitter.com	connect	view source
use.typekit.net	connect	view source
vk.com	connect	view source
www.facebook.com	connect	view source
www.google.com	connect	view source
www.googletagmanager.com	connect	view source
www.instagram.com	connect	view source
www.linkedin.com	connect	view source
www.reddit.com	connect	view source
www.tiktok.com	connect	view source
www.w3.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 114) }. 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://apis.google.com/js/api.js	js library	not fetched	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/9815-8ec06dcc67484a7c.js	js	4.6 KB	2026-10-08	2026-10-08
https://www.google.com/recaptcha/api.js	js library	not fetched	2026-10-08	2026-10-08
https://www.google.com/recaptcha/enterprise.js?render=	js library	not fetched	2026-10-08	2026-10-08
https://www.googletagmanager.com/gtag/js?id=G-VLWR71MF1M	js library	not fetched	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/9429-c0289141be5b2e0d.js	js	8.6 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/9256-b8a6400872d51cfc.js	js	29.2 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/9117-0608ef7aff5e003d.js	js	32.5 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/8848-81608ed749df3d99.js	js	21.7 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/8833-d9fe531de8382cef.js	js	26.6 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/8761-553bb94b6f7f6e1b.js	js	9.1 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/8681-87d1580a90e8eaa0.js	js	18 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/7865-5e2ad0b6f99ba122.js	js	133.3 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/7162-e2e14506b1e264eb.js	js	31.7 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/6571-ded33277b85cb073.js	js	32.3 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/6245-afbf6645812a0a12.js	js	41.5 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/5202-ebfd7a09527abbda.js	js	177.4 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/4980-433f11bd4ac4dd8b.js	js	17.6 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/4621-4a924352067fd413.js	js	54.2 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/4381-97213243bd10881d.js	js	8.9 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/4368-6b6ed25c7024b18e.js	js	10.9 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/4273-c9e35e7214151726.js	js	63.7 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/4136-6328707b1cc5e32e.js	js	42.4 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/4056-4baf11094aa66643.js	js	13.4 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/3362-c0be77fe69a26c2a.js	js	21.1 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/3149-7d631af0335fbb5c.js	js	14.5 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/2773-4c56bf096b5fbe3c.js	js	21.8 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/2420-f4168ad6c6f83cd6.js	js	822.6 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/2083-00136a7760a9cb89.js	js	27.5 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/1815-1bf3d1d22bbc3a02.js	js	8.7 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/1285-19c979bee52ae556.js	js	17.6 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/1141-feb05f6c3e5b4552.js	js	11.3 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/658-3bcf2c73e105eadf.js	js library	18.6 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/552-35bb216df12476b8.js	js	10.4 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/13b76428-e1bf383848c17260.js	js	57.9 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/511-11554f26ea136a06.js	js	26.2 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/bc9e92e6-417f2f89e8c498aa.js	js	265 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/d441faa4-c6545e861c291b36.js	js	113.9 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/2521.3c170f33aac99038.js	js	1.8 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/3440.838f37f0ed9dc4b5.js	js	1.9 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/7069.0cd94fe6110cf543.js	js	1.2 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/6498.4aade824e29a86a5.js	js	1013 B	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/9713.b247dbe2623291df.js	js	4.1 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/2476.39c4d287009c9025.js	js	6.3 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/7683.371b3add78047a8c.js	js	5.1 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/7115.26e77f69be3d68fb.js	js	12.1 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/8172.849b3a37eaafc9de.js	js	10.2 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/9497.83e6055ca7e92297.js	js	13.8 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/5444.5be98b725f5f9975.js	js	57.5 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/6880.8889c71f10f921f8.js	js	25.3 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/9949.2a1a8515362cda9f.js	js	5.4 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/7756.793d8555a6f7aaf8.js	js	19.9 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/7888.c9fa45d79908f7fa.js	js	9.9 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/1351.7e1ffb66d9c62039.js	js	1.3 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/7049.8795f3b7cef4d979.js	js	72.7 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/2387.018f5c8047776a7d.js	js	1.3 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/1146.cc10971bce304897.js	js	13.2 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/1108.410d90ff70c07542.js	js	19.3 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/5306.9dd1bd9d810563bf.js	js	28.8 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/7631.6c88cd6b9d2ba157.js	js	13.6 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/8174.c48ec77f9f3b7821.js	js	11.6 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/8120.d590d6dfbc84c789.js	js	24 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/2189.8bf2a671f11b29ac.js	js	24 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/9611.b61a2e52b6b976ac.js	js	25.3 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/1962.d3518e0fb3e74dad.js	js	7.8 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/9158.9e045f06b826e606.js	js	9.5 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/9365.76416ca76997f9c9.js	js	7.8 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/2989.6d1e3d22f9bc67a1.js	js	9.5 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/1260.c0890fd6052909d0.js	js	8.7 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/5600.f6648fcc9a93f6ab.js	js	21.3 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/8012d7e2.57538e1c786f7bf1.js	js	208.2 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/156.f3f7f26ff72210b2.js	js	4.8 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/5288.ec5d1865ba8676ae.js	js	2.7 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/4254.cb6a3b82cc74a078.js	js	2.4 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/1679.870c6bb65abf3046.js	js	15.2 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/6876.4b84cd36df4adc63.js	js	935 B	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/3866.1058fe38ebe39e47.js	js	25.4 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/6575.2b4c42bdf8abb50c.js	js	18.5 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/3695.b93c663168f0bbcb.js	js	14.4 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/3336.1728c00311455fb1.js	js	15.1 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/2954.0e42890ba3b1d9a7.js	js	7.3 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/2411.d934da91bac69bf8.js	js	11.1 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/e99863e0.44abcbfddb34b6d2.js	js	1.3 MB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/polyfills-42372ed130431b0a.js	js	110 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/webpack-7d1070a6ba560788.js	js	8.7 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/app/layout-80aaedaf27fc71df.js	js	116.5 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/app/not-found-78fd201e2f25179c.js	js	696 B	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/3682-600893874b3dd3e6.js	js	15.2 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/8881-34d5352e6272c5b0.js	js	19.5 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/6056-d1b285427e8c338b.js	js	8.8 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/8680-07fff22e08bf7431.js	js	39.8 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/5726-3244e87b06293fe6.js	js	13.6 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/4477-a65cbea5215e9ee7.js	js	11.4 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/9332-9d794e006d8b3b04.js	js	15.8 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/8026-1c45ccd7474d5375.js	js	22.4 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/8387-7f14b6fc9b074aac.js	js	66.3 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/2854-908330566dd972e5.js	js	91.9 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/9501-ffe23f0c3f9f802b.js	js	29.4 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/4422-33bb52a385888220.js	js	41.9 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/6603-bdc90134b74620c5.js	js	5.8 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/5631-964a88b58add6c3c.js	js	136.3 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/5935-3d971ccc665ecb3f.js	js	19.6 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/2972-ced0dc61b6cdcf10.js	js	20.1 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/9646-a9b4c9c079f09cf3.js	js	17.3 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/app/page-4bebe00c990ea8fc.js	js	11.1 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/9277-66f9936365abe7f4.js	js	30.1 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/778-4fe12579c1baf02d.js	js	9.1 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/7525-b937d289105ff170.js	js	140.8 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/7261-c2a61e7eba276f96.js	js	15.3 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/9349-8377e59610f0bd2b.js	js	62.2 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/main-app-5294d1645fe5526e.js	js	471 B	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/2117-6a853b7117d18a52.js	js	121 KB	2026-10-08	2026-10-08
https://castin.io/_next/static/chunks/fd9d1056-53bef14fbbd6bbee.js	js	168.8 KB	2026-10-08	2026-10-08
https://castin.io/	html	13.8 KB	2026-10-08	2026-10-08

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.

2026-10-08 first crawl

1 page, 114 files, 5.6 MB; 26 libraries, 0 identifiers, 40 third-party hosts
26 libraries added
- @inkeep/cxkit-js 0.5.119
- @clerk/ui 1.34.0
- alist-web 3.55.0
- @tsocial/tvweb-sdk 5.38.6
- @twinalyze/web-analytics 1.0.26
- @marimo-team/frontend 0.25.0
- @desivocal/agents-cdn 1.0.21
- @feathery/react 2.96.0
- jspdf 4.2.1
- @reachfive/identity-core 1.42.0
- @reachfive/identity-ui 2.1.0
- ovenplayer 0.10.54
- and 14 more
44 third-party hosts added
- cdnjs.cloudflare.com
- cdn.jsdelivr.net
- fonts.googleapis.com
- fonts.cdnfonts.com
- react.dev
- www.w3.org
- mui.com
- api.simplesvg.com
- api.unisvg.com
- api.iconify.design
- fonts.googleapis.com
- use.typekit.net
- and 32 more
114 files added

Questions about castin.io

How does PageSourceSearch know what castin.io 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 castin.io 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 castin.io?: 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 castin.io?: 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.