How does PageSourceSearch know what reprex.me 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 reprex.me 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 reprex.me?

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 reprex.me?

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

reprex.me

Built with gtag, dompurify, @babel/runtime, @marimo-team/frontend 0.25.0, pako, @eka-care/medassist-widget 0.1.131, recaptcha, jspdf, @veltdev/sdk 6.0.14, google-apis, pdfobject 2.1.1, fflate and more. 1 page and 8 stored files, last crawled 2026-10-02.

rank 370,015 36 libraries 1 identifier 19 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		2026-10-02
dompurify		2026-10-02
@babel/runtime		2026-10-02
@marimo-team/frontend	0.25.0	2026-10-02
pako		2026-10-02
@eka-care/medassist-widget	0.1.131	2026-10-02
recaptcha		2026-10-02
jspdf		2026-10-02
@veltdev/sdk	6.0.14	2026-10-02
google-apis		2026-10-02
pdfobject	2.1.1	2026-10-02
fflate		2026-10-02
core-js		2026-10-02
canvg		2026-10-02
fast-png		2026-10-02
iobuffer		2026-10-02
performance-now		2026-10-02
raf		2026-10-02
rgbcolor		2026-10-02
stackblur-canvas		2026-10-02
svg-pathdata		2026-10-02
universalviewer	4.4.4	2026-10-02
html2pdf.js	0.14.0	2026-10-02
@orbitellabs/chatbot-sdk	2.0.5	2026-10-02
@feedmepos/mf-inventory-portal	1.7.17	2026-10-02
@bikematrix/web-components	1.3.23	2026-10-02
@prefecthq/prefab-ui	0.20.2	2026-10-02
@etchteam/recycling-locator	1.78.1	2026-10-02
@waniwani/sdk	0.21.3	2026-10-02
@chainlink/cl-search-frontend	0.13.2	2026-10-02
@genpact/genome.mfe.mgtwin-app	1.1.101	2026-10-02
@pydantic/ai-chat-ui	2.3.0	2026-10-02
@twinalyze/web-analytics	1.0.26	2026-10-02
firebase	12.19.0	2026-09-24
@constructor-io/constructorio-ui-autocomplete	1.30.1	2026-09-24
@betterbugs/web-sdk	0.0.47	2026-09-24

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 Analytics 4 measurement id (Google)	G-B7PG32YVYM	view source

Third-party hosts

Hosts outside reprex.me 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
apis.google.com	connect	view source
calendly.com	connect	view source
cdnjs.cloudflare.com	connect	view source
chromewebstore.google.com	connect	view source
firebase.google.com	connect	view source
fonts.googleapis.com	stylesheet	view source
github.com	connect	view source
hooks.zapier.com	connect	view source
jspdf.default.namespaceuri	connect	view source
linkedin.com	connect	view source
r.wdfl.co	script	view source
react.dev	connect	view source
schema.org	connect	view source
securetoken.google.com	connect	view source
ui-avatars.com	connect	view source
www.google.com	connect	view source
www.googletagmanager.com	script	view source
www.linkedin.com	connect	view source
www.w3.org	connect	view source

Stored pages and scripts

The newest stored version of each file, newest first@if (p.FilesTruncated) { (the 500 newest of 8) }. 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	2026-10-02	current
https://cdnjs.cloudflare.com/ajax/libs/pdfobject/2.1.1/pdfobject.min.js	js library	not fetched	2026-10-02	current
https://reprex.me/assets/html2pdf-ByB5OFQN.js	js	953 KB	2026-10-02	current
https://www.google.com/recaptcha/api.js	js library	not fetched	2026-10-02	current
https://www.google.com/recaptcha/enterprise.js?render=	js library	not fetched	2026-10-02	current
https://www.googletagmanager.com/gtag/js?id=G-B7PG32YVYM	js library	not fetched	2026-10-02	current
https://reprex.me/assets/index-Gg7NfrKM.js	js	1.9 MB	2026-10-02	current
https://reprex.me/	html	1.4 KB	2026-10-02	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

1 page, 8 files, 2.8 MB; 33 libraries, 1 identifier, 19 third-party hosts
33 libraries added
- gtag
- @prefecthq/prefab-ui 0.20.2
- @orbitellabs/chatbot-sdk 2.0.5
- universalviewer 4.4.4
- @marimo-team/frontend 0.25.0
- @waniwani/sdk 0.21.3
- @chainlink/cl-search-frontend 0.13.2
- @pydantic/ai-chat-ui 2.3.0
- @veltdev/sdk 6.0.14
- @etchteam/recycling-locator 1.78.1
- @bikematrix/web-components 1.3.23
- @feedmepos/mf-inventory-portal 1.7.17
- and 21 more
1 identifier added
- G-B7PG32YVYM Google Analytics 4 measurement id
19 third-party hosts added
- www.googletagmanager.com
- r.wdfl.co
- fonts.googleapis.com
- react.dev
- www.w3.org
- securetoken.google.com
- firebase.google.com
- apis.google.com
- www.google.com
- calendly.com
- hooks.zapier.com
- ui-avatars.com
- and 7 more
8 files added

Questions about reprex.me

How does PageSourceSearch know what reprex.me 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 reprex.me 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 reprex.me?: 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 reprex.me?: 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.