How does PageSourceSearch know what browserless.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 browserless.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 browserless.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 browserless.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

browserless.io

Built with gtm, @clerk/ui 1.34.0, dashjs 5.2.1, tinymce 8.9.2, @feathery/react 2.96.0, @reachfive/identity-core 1.42.0, @reachfive/identity-ui 2.1.0, jspdf 4.2.1, jszip 3.10.2, spectorjs 0.9.33, universalviewer 4.4.4, @moveo-ai/web-client 0.117.0 and more. 5 pages and 271 stored files, last crawled 2026-10-02.

rank 1,143,931 33 libraries 3 identifiers 66 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
gtm		2026-10-02
@clerk/ui	1.34.0	2026-10-02
dashjs	5.2.1	2026-10-02
tinymce	8.9.2	2026-10-02
@feathery/react	2.96.0	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
jszip	3.10.2	2026-10-02
spectorjs	0.9.33	2026-10-02
universalviewer	4.4.4	2026-10-02
@moveo-ai/web-client	0.117.0	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
@machi-pla/ai-chatbot	0.1.25	2026-10-02
tailwind-merge	3.7.0	2026-10-02
opensheetmusicdisplay	2.1.3	2026-10-02
@ant-design/x	2.9.0	2026-10-02
@tsocial/tvweb-sdk	5.38.6	2026-10-02
xlsx-populate	1.21.0	2026-10-02
analytics-client	3.2.0	2026-10-02
@inkeep/agents-ui-js-cloud	0.17.8	2026-10-02
@joyfill/components	4.0.0-rc26	2026-10-02
@grapecity/spread-excelio	18.2.5	2026-10-02
devextreme-exceljs-fork	4.5.0	2026-10-02
sonner	2.0.8	2026-10-02
@chainlink/cl-search-frontend	0.13.2	2026-10-02
@pydantic/ai-chat-ui	2.3.0	2026-10-02
prismjs	1.30.0	2026-09-25
@blotoutio/providers-blotout-consent-sdk	1.73.0	2026-09-25
@marimo-team/frontend	0.25.0	2026-09-25
@inkeep/cxkit-js	0.5.119	2026-09-25

Tracking, tag and verification IDs

Public identifiers read out of the source. Each links to every other site in the index that carries the same one.

What	Value	Found in
Google site verification (Google)	7z1GX1wvG0mgdK3G9ndTUyICOg9jc0rVfjXDuTAEApU	view source
Google Tag Manager container (Google)	GTM-W3GKNFS8	view source
HubSpot portal id (HubSpot)	244229270	view source

Third-party hosts

Hosts outside browserless.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
addons.mozilla.org	connect	view source
api.axiom.co	connect	view source
api.eu.amplitude.com	connect	view source
api.github.com	connect	view source
api.hsforms.com	connect	view source
api.ipify.org	connect	view source
api.kapa.ai	connect	view source
api2.amplitude.com	connect	view source
app.amplitude.com	connect	view source
app.eu.amplitude.com	connect	view source
app.example.com	connect	view source
app.scrapingbee.com	connect	view source
apps.stag2.amplitude.com	connect	view source
browserless-dev.supabase.co	connect	view source
browserless-docs.mcp.kapa.ai	connect	view source
browserless.localhost	connect	view source
browserless.retool.com	connect	view source
browserless.rewardful.com	connect	view source
cdn.amplitude.com	connect	view source
cdn.prod.website-files.com	connect	view source
challenges.cloudflare.com	connect	view source
chrome.google.com	connect	view source
cloudflare-protected-site.com	connect	view source
code.jquery.com	connect	view source
d3uuvo4xw25bfg.cloudfront.net	connect	view source
d3uycvholi7jx8.cloudfront.net	connect	view source
dashboard.stripe.com	connect	view source
datadome-protected-site.com	connect	view source
diagnostics.prod.eu-central-1.amplitude.com	connect	view source
diagnostics.prod.us-west-2.amplitude.com	connect	view source
eu-central-1.aws.edge.axiom.co	connect	view source
example-protected-site.com	connect	view source
example.com	connect	view source
forms.hsforms.com	connect	view source
github.com	connect	view source
google.com	connect	view source
heavily-protected-site.com	connect	view source
httpbin.org	connect	view source
hub.docker.com	connect	view source
i.ytimg.com	connect	view source
ipinfo.io	connect	view source
lucide.dev	connect	view source
msn.com	connect	view source
news.ycombinator.com	connect	view source
portal.example.com	connect	view source
protected-site.com	connect	view source
public-assets-browserless.s3.us-east-1.amazonaws.com	connect	view source
raw.githubusercontent.com	connect	view source
react.dev	connect	view source
reactjs.org	connect	view source
schema.org	connect	view source
sr-client-cfg.amplitude.com	connect	view source
sr-client-cfg.eu.amplitude.com	connect	view source
start.1password.com	connect	view source
twitter.com	connect	view source
us-east-1.aws.edge.axiom.co	connect	view source
widget.kapa.ai	connect	view source
widget.usepylon.com	connect	view source
www.amazon.com	connect	view source
www.example.com	connect	view source
www.instagram.com	connect	view source
www.linkedin.com	connect	view source
www.w3.org	connect	view source
www.youtube-nocookie.com	connect	view source
www.youtube.com	connect	view source
your-ehr-portal.example	connect	view source

Stored pages and scripts

The newest stored version of each file, newest first@if (p.FilesTruncated) { (the 500 newest of 271) }. 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
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https://www.browserless.io/_next/static/chunks/pages/_app-1ef26a47ae396d0c.js	js	162.7 KB	2026-09-25	current
https://www.browserless.io/_next/static/chunks/main-eabceaf79b646078.js	js	125.6 KB	2026-09-25	current
https://www.browserless.io/_next/static/chunks/webpack-4df3627dd1c48aae.js	js	11 KB	2026-09-25	current

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, 7.6 MB; 29 libraries, 3 identifiers, 66 third-party hosts
29 libraries added
- gtm
- 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
- tinymce 8.9.2
- @ant-design/x 2.9.0
- @inkeep/agents-ui-js-cloud 0.17.8
- @clerk/ui 1.34.0
- and 17 more
3 identifiers added
- GTM-W3GKNFS8 Google Tag Manager container
- 7z1GX1wvG0mgdK3G9ndTUyICOg9jc0rVfjXDuTAEApU Google site verification
- 244229270 HubSpot portal id
66 third-party hosts added
- github.com
- react.dev
- www.w3.org
- browserless.localhost
- api.github.com
- browserless-dev.supabase.co
- twitter.com
- www.linkedin.com
- www.youtube.com
- www.instagram.com
- hub.docker.com
- cdn.prod.website-files.com
- and 54 more
200 files added

Questions about browserless.io

How does PageSourceSearch know what browserless.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 browserless.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 browserless.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 browserless.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.