How does PageSourceSearch know what systems-in-blue.de 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 systems-in-blue.de 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 systems-in-blue.de?

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 systems-in-blue.de?

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

systems-in-blue.de

Built with gsap 3.15.0, webpack, dompurify 3.0.3, magnific-popup 1.2.0, masonry-layout 4.2.2, lottie-web 5.13.0, tippy.js 6.3.7, bowser 2.14.1, @fancyapps/fancybox 3.5.7, @undp/design-system-assets 2.0.2, @lottiefiles/lottie-player 2.0.12, waypoints 4.0.1 and more. 5 pages and 124 stored files, last crawled 2026-10-03.

rank 1,576,785 56 libraries 1 identifier 50 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
gsap	3.15.0	2026-10-03
webpack		2026-10-03
dompurify	3.0.3	2026-10-03
magnific-popup	1.2.0	2026-10-03
masonry-layout	4.2.2	2026-10-03
lottie-web	5.13.0	2026-10-03
tippy.js	6.3.7	2026-10-03
bowser	2.14.1	2026-10-03
@fancyapps/fancybox	3.5.7	2026-10-03
@undp/design-system-assets	2.0.2	2026-10-03
@lottiefiles/lottie-player	2.0.12	2026-10-03
waypoints	4.0.1	2026-10-03
jquery-ui-dist	1.13.3	2026-10-03
oidc-client	1.11.5	2026-10-03
mediaelement	7.1.0	2026-10-03
imagesloaded	5.0.0	2026-10-03
tableexport.jquery.plugin	1.33.0	2026-10-03
mdbootstrap	4.20.0	2026-10-03
isotope-layout	3.0.6	2026-10-03
justifiedgallery	3.8.1	2026-10-03
vimeo-player		2026-10-03
tablesorter	2.32.0	2026-10-03
formiojs	4.21.7	2026-10-03
universalviewer	4.4.4	2026-10-03
jsxgraph	1.13.3	2026-10-03
slick-slider	1.8.2	2026-10-03
supafolio-sdk	1.4.1	2026-10-03
vue-tippy	6.8.0	2026-10-03
infinite-scroll	5.0.0	2026-10-03
@goodgamestudios/swiper4	4.5.6	2026-10-03
jquery.flipster	1.1.6	2026-10-03
@vitest/utils	5.0.2	2026-10-03
@johanaarstein/dotlottie-player	1.5.23	2026-10-03
semantic-ui-react	2.1.5	2026-10-03
x3.photo.gallery	3.34.2	2026-10-03
kifu-for-js	5.5.0	2026-10-03
@builder.io/webcomponents	2.0.2	2026-10-03
@baloise/ds-core	19.11.0	2026-10-03
@saasquatch/mint-components	2.5.1	2026-10-03
@3t-transform/threeteeui	1.12.1	2026-10-03
@animuz/embed	0.2.9	2026-10-03
anzhiyu-theme-static	1.1.10	2026-10-03
@grapecity/gcpdfviewer	7.2.3	2026-10-03
veris-storybook-beta	0.1.81-react-upgrade	2026-10-03
@grigorov-it/mazer	2.2.0	2026-10-03
@dettalant/laymic	2.2.2	2026-10-03
sprestlib	1.9.0	2026-10-03
@uizaio/playerjs	5.20.8-rc2	2026-10-03
hexo-theme-redefine	2.9.0	2026-10-03
@wix/image	1.454.0	2026-10-03
bkl-request-demo	1.0.8	2026-10-03
@solace-health/solace-entry-widget	2.0.5	2026-10-03
cloudinary-video-player	4.1.2	2026-09-25
@feathery/react	2.96.0	2026-09-25
pdf-parse	2.4.5	2026-09-25
@chakra-ui/utils	2.2.2	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
Facebook domain verification (Meta)	19giqkgfbaau1887czpwpg6a9mhtal	view source

Third-party hosts

Hosts outside systems-in-blue.de 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.whatsapp.com	connect	view source
buffer.com	connect	view source
cdn.dashjs.org	connect	view source
cdn.jsdelivr.net	connect	view source
cdn.plyr.io	connect	view source
compose.mail.yahoo.com	connect	view source
connect.facebook.net	connect	view source
connect.mail.ru	connect	view source
connect.ok.ru	connect	view source
del.icio.us	connect	view source
developers.google.com	connect	view source
digg.com	connect	view source
fonts.googleapis.com	stylesheet	view source
getpocket.com	connect	view source
github.com	connect	view source
go.aniview.com	connect	view source
go.elementor.com	connect	view source
i.ytimg.com	connect	view source
imasdk.googleapis.com	connect	view source
img.youtube.com	connect	view source
lineit.line.me	connect	view source
mix.com	connect	view source
noembed.com	connect	view source
open.spotify.com	iframe	view source
pinterest.com	connect	view source
player.vimeo.com	connect	view source
plus.google.com	connect	view source
service.weibo.com	connect	view source
share.diasporafoundation.org	connect	view source
share.flipboard.com	connect	view source
twitter.com	connect	view source
v.t.qq.com	connect	view source
vimeo.com	connect	view source
vk.com	connect	view source
web.skype.com	connect	view source
widget.renren.com	connect	view source
www.amazon.com	connect	view source
www.blogger.com	connect	view source
www.evernote.com	connect	view source
www.facebook.com	iframe connect	view source
www.linkedin.com	connect	view source
www.pinterest.com	connect	view source
www.reddit.com	connect	view source
www.stumbleupon.com	connect	view source
www.tumblr.com	connect	view source
www.w3.org	connect	view source
www.xing.com	connect	view source
www.youtube	connect	view source
www.youtube-nocookie.com	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 124) }. 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://player.vimeo.com/api/player.js	js library	not fetched	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…bf95a3e0330b38877.bundle.min.js	js	6.2 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…e9c10a9d0abc3454e.bundle.min.js	js	7.5 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…7f0c4423917225bce.bundle.min.js	js	3 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…87ca4cc0fe98c8ddb.bundle.min.js	js	7.8 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…a9e1e97c52ac3bf8c.bundle.min.js	js	1.1 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…20778c6f4166576c4.bundle.min.js	js	22.6 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…ae0f5699fe9733e7d.bundle.min.js	js	2.7 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…fd6593adbba21698e.bundle.min.js	js	1.3 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…38ab2476dd2d124e6.bundle.min.js	js	8.7 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…d7d31fbf96c3dbdfc.bundle.min.js	js	3.4 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…7a3d06f24f7ea6951.bundle.min.js	js	1.9 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…10d01e625dad87f73.bundle.min.js	js	6.1 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…0c6cb753d4098eff5.bundle.min.js	js	5.1 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…af78282979b6f74e4.bundle.min.js	js	6.4 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…7b80e9ba9e5072070.bundle.min.js	js	4.6 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…45ab1120a8c28c05c.bundle.min.js	js	3.4 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…a87283d08dad12f18.bundle.min.js	js	2.1 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…c917134774f65dd6d.bundle.min.js	js	7.9 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…1a0cc520a3fc67bd8.bundle.min.js	js	8.1 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…e44e8608690943f29.bundle.min.js	js	1022 B	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…b9afd278bb9c5e75b.bundle.min.js	js	3.8 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…4daf4a4285a8632b8.bundle.min.js	js	1.5 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…5e89624dc6b81a11a.bundle.min.js	js	7.1 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…f3e27e57db8207afc.bundle.min.js	js	3.2 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…573b5d1f73abd80b9.bundle.min.js	js	5.1 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…c1727e36940b18f29.bundle.min.js	js	751 B	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…811186e94a386ba7b.bundle.min.js	js	4.7 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…b778d23c04461c4ea.bundle.min.js	js	14.1 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…9a354ce039d1ba641.bundle.min.js	js	5.7 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…f1a6475f0741920ff.bundle.min.js	js	18.8 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…1751404c381bfe390.bundle.min.js	js	2.8 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…41c879efa861dbbfa.bundle.min.js	js	2.6 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…2b45d7826c1c48f33.bundle.min.js	js	4.9 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…2224ef13e6f999011.bundle.min.js	js	6.8 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…c6517c2a055f6c242.bundle.min.js	js	7.7 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…51a08af7543da98e6.bundle.min.js	js	5.1 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…bca466dfeb9585680.bundle.min.js	js	2 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…45ddf42fde6647dbc.bundle.min.js	js	21.2 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…d5af7df85963df32c.bundle.min.js	js	872 B	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…ca1f2470fa6474595.bundle.min.js	js	22.1 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…979661569ddbbf60d.bundle.min.js	js	472 B	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…a2a923085e1120e75.bundle.min.js	js	9.6 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…0ced143febb8cd31a.bundle.min.js	js	349 B	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…5aafbe5bf0e127950.bundle.min.js	js	1.3 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…5c6362492d9067512.bundle.min.js	js	432 B	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…c91c1b2b642a34601.bundle.min.js	js	3.1 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…81477c45ff5cf9d4d.bundle.min.js	js	3.7 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…f012a6336ab21cb44.bundle.min.js	js	791 B	2026-10-03	current
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https://www.systems-in-blue.de/wp-content/plugin…2a0fee74ee3ed0419.bundle.min.js	js	624 B	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…9675460c73eb48972.bundle.min.js	js	3.7 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…8a9cd0e50cf1a5a9c.bundle.min.js	js	24.7 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…920846d1e37cafb78.bundle.min.js	js	29.5 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…ery.smartmenus.min.js?ver=1.2.1	js	23.5 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…ents-handlers.min.js?ver=3.22.1	js	40.6 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…/js/frontend.min.js?ver=3.22.1	js	24.5 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-includes/js/di…?ver=c26c3dc7bed366793375	js	5.2 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-includes/js/di…?ver=dd5603f07f9220ed27f1	js	5.5 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…k-pro.runtime.min.js?ver=3.22.1	js library	5.7 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…/rael-frontend.js?ver=2.1.0	js	220.2 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…ael-animations.min.js?ver=2.1.0	js	14.8 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…ticky-frontend.min.js?ver=2.1.0	js	11 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…jquery.jsticky.min.js?ver=2.1.0	js	1.3 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…jquery.sticky.min.js?ver=3.22.1	js	3.6 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…complianz.min.js?ver=1768911076	js	39.7 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…/view/general.min.js?ver=6.5.9	js	11.3 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…sticky-sidebar.min.js?ver=2.1.0	js	11.6 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…/ResizeSensor.min.js?ver=2.1.0	js	2.2 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…/rael-particles.js?ver=2.1.0	js	297.8 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…/rael-twitter-feed.js?ver=2.1.0	js	1.1 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…magnific-popup.min.js?ver=2.1.0	js library	19.4 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…/lib/plyr/plyr.min.js?ver=2.1.0	js	117.2 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…stacking-cards.min.js?ver=2.1.0	js	4.2 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…/ScrollTrigger.min.js?ver=2.1.0	js library	42.4 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…/lib/gsap/gsap.min.js?ver=2.1.0	js	70.5 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…/inview/inview.min.js?ver=2.1.0	js	1.3 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…ael-photoswipe.min.js?ver=2.1.0	js	36.1 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…ipe-ui-default.min.js?ver=2.1.0	js	9.6 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…/photoswipe.min.js?ver=2.1.0	js	31.2 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-includes/js/imagesloaded.min.js?ver=5.0.0	js	5.4 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-includes/js/masonry.min.js?ver=4.2.2	js	23.6 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…/lottie/lottie.min.js?ver=2.1.0	js	246.7 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…ery.smartmenus.min.js?ver=2.1.0	js	24.6 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…/isotope.min.js?ver=2.1.0	js	34 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…/jquery_resize.min.js?ver=2.1.0	js	3.2 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…stifiedgallery.min.js?ver=2.1.0	js library	18.1 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…query_fancybox.min.js?ver=2.1.0	js	59.6 KB	2026-10-03	current
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https://www.systems-in-blue.de/wp-includes/js/jquery/ui/core.min.js?ver=1.13.3	js library	21 KB	2026-10-03	current
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https://www.systems-in-blue.de/wp-content/plugin…bpack.runtime.min.js?ver=3.22.2	js library	4.9 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…/lib/swiper/swiper.js?ver=2.1.0	js	296.7 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…ery-event-move.min.js?ver=2.1.0	js	5.4 KB	2026-10-03	current
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https://www.systems-in-blue.de/wp-content/plugin…ociality-share.min.js?ver=1.3.5	js	9.2 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…/sociality.min.js?ver=1.3.5	js	1 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…or-addons-lightbox.js?ver=2.1.9	js	4.1 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…/vendors/flickity.js?ver=2.1.9	js	49.8 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…/accordion.js?ver=2.1.9	js	8.8 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…/vendors/slick.min.js?ver=2.1.9	js library	42.9 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…dons-inherit-theme.js?ver=2.1.9	js	1.8 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…/content-timeline.js?ver=2.1.9	js	4.8 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…ontend_blocks.js?ver=1768911273	js	42.8 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-includes/js/me…p-mediaelement.min.js?ver=6.9.9	js	1.1 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-includes/js/me…lement-migrate.min.js?ver=6.9.9	js	1.2 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-includes/js/me…nt-and-player.min.js?ver=4.2.17	js	154.3 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…/js/v4-shims.min.js?ver=3.22.2	js	14.7 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-content/plugin…/rael-widgets.js?ver=2.1.0	js	508 B	2026-10-03	current
https://www.systems-in-blue.de/wp-includes/js/jq…jquery-migrate.min.js?ver=3.4.1	js	13.3 KB	2026-10-03	current
https://www.systems-in-blue.de/wp-includes/js/jquery/jquery.min.js?ver=3.7.1	js library	85.5 KB	2026-10-03	current
https://www.systems-in-blue.de/diskografie/	html	330.4 KB	2026-10-03	2026-10-03
https://www.systems-in-blue.de/mitglieder/	html	119.6 KB	2026-10-03	2026-10-03
https://www.systems-in-blue.de/ueber-uns/	html	101.6 KB	2026-10-03	2026-10-03
https://www.systems-in-blue.de/news/	html	113.1 KB	2026-10-03	2026-10-03
https://www.systems-in-blue.de/	html	169.1 KB	2026-10-03	2026-10-03

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.

2026-10-03 first crawl

5 pages, 124 files, 3.5 MB; 53 libraries, 1 identifier, 50 third-party hosts
53 libraries added
- @vitest/utils 5.0.2
- jquery.flipster 1.1.6
- @grigorov-it/mazer 2.2.0
- jsxgraph 1.13.3
- mediaelement 7.1.0
- universalviewer 4.4.4
- waypoints 4.0.1
- slick-slider 1.8.2
- mdbootstrap 4.20.0
- supafolio-sdk 1.4.1
- infinite-scroll 5.0.0
- @goodgamestudios/swiper4 4.5.6
- and 41 more
1 identifier added
- 19giqkgfbaau1887czpwpg6a9mhtal Facebook domain verification
51 third-party hosts added
- open.spotify.com
- www.facebook.com
- fonts.googleapis.com
- cdn.dashjs.org
- cdn.jsdelivr.net
- www.youtube.com
- www.youtube-nocookie.com
- img.youtube.com
- www.youtube
- player.vimeo.com
- twitter.com
- www.w3.org
- and 39 more
124 files added

Questions about systems-in-blue.de

How does PageSourceSearch know what systems-in-blue.de 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 systems-in-blue.de 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 systems-in-blue.de?: 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 systems-in-blue.de?: 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.