How does PageSourceSearch know what qrtracker.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 qrtracker.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 qrtracker.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 qrtracker.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

qrtracker.io

Built with @finsweet/attributes 2.7.1, @marimo-team/frontend 0.25.0, @feathery/react 2.98.1, jspdf 4.2.1, @constructor-io/constructorio-ui-autocomplete 1.30.1, @supabase/phoenix 0.4.5, @commonlit/commonlit-frontend 0.1.0, @desivocal/agents-cdn 1.0.21, @zxing/library 0.23.0, @scalar/api-reference 1.72.1, @feedmepos/mf-report 5.29.2, @epigraph/configurator 2.7.0 and more. 7 pages and 238 stored files, last crawled 2026-10-02.

rank 310,018 44 libraries 0 identifiers 38 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
@finsweet/attributes	2.7.1	2026-10-02
@marimo-team/frontend	0.25.0	2026-10-02
@feathery/react	2.98.1	2026-10-02
jspdf	4.2.1	2026-10-02
@constructor-io/constructorio-ui-autocomplete	1.30.1	2026-10-02
@supabase/phoenix	0.4.5	2026-10-02
@commonlit/commonlit-frontend	0.1.0	2026-10-02
@desivocal/agents-cdn	1.0.21	2026-10-02
@zxing/library	0.23.0	2026-10-02
@scalar/api-reference	1.72.1	2026-10-02
@feedmepos/mf-report	5.29.2	2026-10-02
@epigraph/configurator	2.7.0	2026-10-02
@alfatech/livechat	2026.9.0-9.2	2026-10-02
@feedmepos/mf-menu	0.32.80-alpha.2	2026-10-02
@vitest/utils	5.0.2	2026-10-02
@covalent/components	11.22.1	2026-10-02
@feedmepos/mf-connect	0.1.98-beta.68	2026-10-02
excellentexport	3.9.16	2026-10-02
dayschedule-widget	1.2.8	2026-10-02
@zxing/browser	0.2.1	2026-10-02
@prefecthq/prefab-ui	0.20.2	2026-10-02
@etchteam/recycling-locator	1.78.1	2026-10-02
@perceptimagery/dita-configurator	1.3.24	2026-10-02
@wavoip/wavoip-webphone	1.9.1	2026-10-02
@laburen/embeds	1.0.237	2026-10-02
@feedmepos/ui-library	1.10.17	2026-10-02
@formbird/angular-elements	8.5.10	2026-10-02
tia-gpc-widget	3.1.1	2026-10-02
@genpact/genome.mfe.mgtwin-app	1.1.101	2026-10-02
@amcharts/amcharts5	5.20.8	2026-10-02
alist-web	3.55.0	2026-10-02
@digital-realty/ui-mfe-reports	16.0.1	2026-10-02
@pydantic/ai-chat-ui	2.3.0	2026-10-02
amcharts3	3.21.15	2026-10-02
@wix/design-system	1.328.0	2026-09-24
@highlightjs/cdn-assets	11.12.0	2026-09-24
react-router	6.27.0	2026-09-24
tableexport.jquery.plugin	1.33.0	2026-09-24
xlsx-js-style	1.2.0	2026-09-24
html5-qrcode	2.3.8	2026-09-24
face-age	2.4.6	2026-09-24
alasql	4.19.1	2026-09-24
vue3-sfc-loader	0.9.5	2026-09-24
@inkeep/cxkit-mintlify	0.5.119	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 qrtracker.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
acmebakery.com	connect	view source
antiphishing.org	connect	view source
cdnjs.cloudflare.com	connect	view source
consumer.ftc.gov	connect	view source
demo.com	connect	view source
developers.google.com	connect	view source
docs.oasis-open.org	connect	view source
event.com	connect	view source
example.com	connect	view source
github.com	connect	view source
instagram.com	connect	view source
jspdf.default.namespaceuri	connect	view source
linkedin.com	connect	view source
mypjqnkubkoutprhmkdh.supabase.co	connect	view source
openoffice.org	connect	view source
purl.oclc.org	connect	view source
purl.org	connect	view source
reactjs.org	connect	view source
reportfraud.ftc.gov	connect	view source
safebrowsing.google.com	connect	view source
schema.org	connect	view source
schemas.microsoft.com	connect	view source
schemas.openxmlformats.org	connect	view source
search.google.com	connect	view source
secure-billing-update.example.com	connect	view source
sheetjs.openxmlformats.org	connect	view source
uppercut.co	connect	view source
www.googletagmanager.com	connect	view source
www.ibm.com	connect	view source
www.ic3.gov	connect	view source
www.linkedin.com	connect	view source
www.microsoft.com	connect	view source
www.sitemaps.org	connect	view source
www.uspis.gov	connect	view source
www.w3.org	connect	view source
your-brand.com	connect	view source
yoursite.com	connect	view source
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 238) }. 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://qrtracker.io/sw.js	js	6.8 KB	2026-10-02	current
https://qrtracker.io/assets/QRCodePreview-CoF5zSuZ.js	js	408.2 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/QRCodeGenerator-CiBCz0wj.js	js	35.1 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/index-ImROAkFP.js	js	447.6 KB	2026-10-02	current
https://qrtracker.io/assets/jsQR-DcdMxZT5.js	js	127.6 KB	2026-10-02	current
https://qrtracker.io/assets/BlogPostMarkdown-CyQdVliP.js	js	360.8 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/browser-BgFWJ1HW.js	js	269 B	2026-10-02	current
https://qrtracker.io/assets/LazyQRComponents-BHKJlZFc.js	js	1.8 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/security-D5wejbHW.js	js	1.9 KB	2026-10-02	current
https://qrtracker.io/assets/QRCodeGuide-PTx4el-e.js	js	5.7 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/FinalCTA-CSJbQZph.js	js	1.3 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/HelpCenterSection-eAF5gQLE.js	js	3.4 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/FAQ-itoCUOCp.js	js	6.7 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/PricingCTA-CPSPv2CX.js	js	5.8 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/AnalyticsShowcase-BL30B-zT.js	js	5.1 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/HowItWorks-CiRjCyyS.js	js	1.9 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/SocialProof-Dizj_K5z.js	js	2.3 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/useWebVitals-CttkOZtS.js	js	6.4 KB	2026-10-02	current
https://qrtracker.io/assets/ShirtScan-Cbs0Nc0z.js	js	5.2 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/ExtensionConnect-r8N-c6zF.js	js	1.8 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/SEOTools-CcRAs4eE.js	js	1.8 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/ChurchGuideLeads-MjCkQe1I.js	js	4.5 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/ChurchQRCodeGuide-BKJqVeYg.js	js	10.9 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/ChurchQRCodes-CM4_QxKu.js	js	25.4 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/QRCodeTrackingForRealEstate-Dn5aMhrK.js	js	9.7 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/QRCodeTrackingForRestaurants-Bh7XJDP-.js	js	9.8 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/QRCodeTrackingForSignShops-3sU5VhjU.js	js	9.8 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/QRCodeTrackingForBusinessCards-DRN4OuPR.js	js	9.9 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/QRCodeTrackingForFlyers-DLIUp18p.js	js	9.6 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/BestQRCodeTracker-B7xadINl.js	js	11.5 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/IsQRCodeTrackingSafe-Dj3xB0z1.js	js	10.8 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/QRCodeSecurity-EDDzYYCV.js	js	11.3 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/SafeQRCodeScanner-EUG3o70A.js	js	9.6 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/DynamicQRCodesThatKeepWorking-Bonvqz8U.js	js	12.5 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/LogoQRStudio-D_z3kaAz.js	js	91.1 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/QRCodeTemplateDetail-BEzAwEtl.js	js	9.5 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/QRCodeTemplates-JQwJ6I70.js	js	7 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/GenerateV2-cda9Twsc.js	js	71.6 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/QRUnavailable-DgyFCCgY.js	js	1.4 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/NotFound-4JWdjJC8.js	js	1.5 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/QRCodeGeneratorWithTracking-CmsRq1p0.js	js	12 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/DynamicQRCodes-Dn96yGzb.js	js	13.9 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/QRCodeAnalytics-BPq5IlvG.js	js	20.1 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/TrackableQRCode-CEl_-K_s.js	js	18.3 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/QRCodeTracking-BRQ6wF05.js	js	20.4 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/BitlyUniqodeAlternative-ya2lx5JJ.js	js	13.6 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/SafeScan-Bvyk715P.js	js	369.9 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/SEOOptimization-5l9ZCh0H.js	js	43.8 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/APIKeys-CtZtUt9a.js	js	11.4 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/ConnectQRTrackerToGemini-CT8cZYuO.js	js	16.1 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/ConnectQRTrackerToGrok-CPYZRLbX.js	js	13.3 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/ConnectQRTrackerToClaude-CAX4XPLm.js	js	14.5 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/ConnectQRTrackerToAIAgents-ByQaW3Ez.js	js	28.7 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/ConnectQRTrackerToChatGPT-DUCoCJfd.js	js	11.1 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/HelpCategory-B7zmalY1.js	js	729.2 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/DynamicQRCodesKeepWorking-PylWKdyK.js	js	10.2 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/QRCodesInAirports-D8_xhhUP.js	js	28.5 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/QRTrackingForPrintAndSignShops-DmfE2qZi.js	js	47.1 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/TrackableVCardGuide-R9aYoBXo.js	js	23.8 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/WhatIsQuishing-BVdKx3fQ.js	js	42.5 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/BestQRCodeGeneratorMarketing-CM1wDS5V.js	js	15 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/CanYouTrackQRCodeScans-_0Rw98KG.js	js	10 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/DoDynamicQRCodesExpire-xdxBYcaU.js	js	9.9 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/HowDoesQRCodeTrackingWork-BYhPlxqo.js	js	10.2 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/StaticVsDynamicQRCodes-B0PitD_b.js	js	12.1 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/WhatIsQRCodeTracking-IW8wkx60.js	js	10.7 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/DynamicVsStaticQRCodes-DywnipUd.js	js	15.3 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/WhatIsQRCodeTracking-D9eL45Qe.js	js	10.9 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/FreeQRCodeGenerator-rrGpaY0j.js	js	38.2 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/QRCodeCampaignOptimization-Ka_Q4Ti_.js	js	37.4 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/UnderstandingAnalyticsDashboard-CgTioOsy.js	js	16.2 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/QRCodeBestPracticesBeginners-DcjZ3vVN.js	js	17.8 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/CompleteGuideQRCustomization-Bwiq7n3f.js	js	14.5 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/QRCodeSizeAndPlacementGuidelines-Cce9rih8.js	js	20.6 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/QRCodesForRestaurantMenus-DvWO_UJy.js	js	26.4 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/BeginnerGuideQRCodes-BsEyQARg.js	js	39.8 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/QRCodesInMarketingCampaigns-BiQDSg1Q.js	js	20.1 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/ColorPsychologyQRDesign-Dymjm6zm.js	js	24.8 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/TrackingNotWorkingWhy-Dlzblpxs.js	js	12.7 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/TrackingROI-CKIheMNu.js	js	24.3 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/GIMPIntegration-BMJI1xHs.js	js	26.6 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/IllustratorIntegration-CHrz_0HV.js	js	24.1 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/PhotoshopIntegration-DEw25g78.js	js	24.1 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/CanvaIntegration-vXulBeB0.js	js	23.6 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/AddingLogosToQRCodes-BKRr8vqA.js	js	20.9 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/SettingUpTrackingAnalytics-C6mrhIn4.js	js	17.4 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/UltimateGuideQRCodeTracking-ssfwfA4m.js	js	48.7 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/PrivacyBestPractices-B_I-789d.js	js	11.3 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/PreventTampering-DDoSbcv_.js	js	13.4 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/GDPRCompliance-CHS4mKjC.js	js	15 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/SecurityCompliance-BXiqBXkc.js	js	15.3 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/WhyWontQRCodeScan-DyMCDrDF.js	js	13.3 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/DesignCustomQRCode-De9SCfL9.js	js	13.1 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/CreateFirstQRCode-Vh5ZzEla.js	js	14.4 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/SEOHub-BhxeTwgU.js	js	35.4 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/BlogPost-OuwDL1DQ.js	js	10.6 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/Help-B9tivQg0.js	js	30.6 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/ThankYou-DpRL8uEx.js	js	8.1 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/InterestForm-DAmVWiUC.js	js	3 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/AdminSupport-bNVE--S3.js	js	14.8 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/Admin-DkRlPqtL.js	js	36.7 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/FAQ-CsO3BKIU.js	js	14.3 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/TermsOfService-Dn5FXidP.js	js	11.7 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/PrivacyPolicy-DRyxDZwM.js	js	19.2 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/Profile-D9Hni649.js	js	26.9 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/Pricing-CtIuaaVv.js	js	15.7 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/Generate-DfJp-kSA.js	js	2.6 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/Redirect-C4RJWU6v.js	js	2 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/Track-_s3B8WPQ.js	js	391.9 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/Dashboard-DHYD-coG.js	js	2.8 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/ForgotPassword-_eMaxv94.js	js	3.5 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/ResetPassword-B4qkC6hc.js	js	3.8 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/OAuthConsent-Xai4hOF1.js	js	6.3 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/AuthCallback-DDR0oZlf.js	js	1.2 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/Login-Cg9IG9p_.js	js	9.1 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/Contact-CpT5zHRU.js	js	15.9 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/Index-LuRRxPks.js	js	19.1 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/vendor-BOYdj2Dv.js	js	159 KB	2026-10-02	current
https://qrtracker.io/assets/index-DWIxkO13.js	js	535.7 KB	2026-10-02	2026-10-02
https://qrtracker.io/contact	html	12.6 KB	2026-10-02	2026-10-02
https://qrtracker.io/pricing	html	12.5 KB	2026-10-02	2026-10-02
https://qrtracker.io/help/article/connect-qrtracker-to-ai-agents	html	14.2 KB	2026-10-02	2026-10-02
https://qrtracker.io/	html	60.4 KB	2026-10-02	2026-10-02
https://qrtracker.io/login	html	12.4 KB	2026-10-02	2026-10-02
https://qrtracker.io/assets/QRCodePreview-o_TZZWV9.js	js	408.2 KB	2026-09-24	current
https://qrtracker.io/assets/QRCodeGenerator-CFqylpfn.js	js	35.1 KB	2026-09-24	current
https://qrtracker.io/assets/BlogPostMarkdown-BfGxCnAL.js	js	513.9 KB	2026-09-24	current
https://qrtracker.io/assets/LazyQRComponents-CQLiKNjI.js	js	1.8 KB	2026-09-24	current
https://qrtracker.io/assets/QRCodeGuide-DbTkttNY.js	js	5.7 KB	2026-09-24	current
https://qrtracker.io/assets/FinalCTA-CcATFSLe.js	js	1.3 KB	2026-09-24	current
https://qrtracker.io/assets/HelpCenterSection-MJ50r6Rp.js	js	3.4 KB	2026-09-24	current
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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, 124 files, 5.3 MB; 34 libraries, 0 identifiers, 38 third-party hosts
34 libraries added
- @vitest/utils 5.0.2
- @pydantic/ai-chat-ui 2.3.0
- @desivocal/agents-cdn 1.0.21
- @marimo-team/frontend 0.25.0
- @wavoip/wavoip-webphone 1.9.1
- dayschedule-widget 1.2.8
- @etchteam/recycling-locator 1.78.1
- @feedmepos/ui-library 1.10.17
- @alfatech/livechat 2026.9.0-9.2
- @supabase/phoenix 0.4.5
- @epigraph/configurator 2.7.0
- @constructor-io/constructorio-ui-autocomplete 1.30.1
- and 22 more
38 third-party hosts added
124 files added

Questions about qrtracker.io

How does PageSourceSearch know what qrtracker.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 qrtracker.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 qrtracker.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 qrtracker.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.