ua-tracer
by Paul Kinlan
ua-tracer
what does a user agent actually fetch, follow & run?
This page just minted a fresh trace id 8ZWDQV9A. Every asset it references
lives under /r/8ZWDQV9A/…, so each fetch is tied back to this request and
your User-Agent. Layered probes inside the CSS and JS reveal whether your UA parses CSS, follows
resources linked from CSS, and actually executes JavaScript.
Try it: point a crawler at this URL, or run a fresh trace with curl — each load is its own trace:
curl -A "AmberFalconBot/9.8" https://ua-tracer.paulkinlan-ea.deno.net/
…then open the matching row below. A plain curl only records the homepage
hit (it parses no CSS and runs no JS) — that contrast is the whole point.
By user agent
Running counts across the last 200 homepage requests, grouped by user agent. Click one to filter the list below.
View all 69 user agents (paged) →
Recent homepage requests
Newest first. Each row is a single load of / by some user agent.
| Timestamp | User Agent | Assets |
|---|---|---|
| 2026-06-22 23:10:09.914 UTC | Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com) | 0 |
no JS— | ||
| 2026-06-22 21:39:31.922 UTC | Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:92.0) Gecko/20100101 Firefox/92.0 | 0 |
no JS— | ||
| 2026-06-22 20:55:57.884 UTC | Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) HeadlessChrome/138.0.7204.23 Safari/537.36 | 17 |
JS ranCSSJSmoduleimgfontcss-bgcss-fontfaviconapple-iconpreloadprefetchiframeiframe-img@import | ||
| 2026-06-22 20:54:57.354 UTC | okhttp/5.3.0 | 2 |
no JSfaviconapple-icon | ||
| 2026-06-22 20:15:21.180 UTC | Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/144.0.0.0 Safari/537.36 | 0 |
no JS— | ||
| 2026-06-22 20:01:44.836 UTC | Reeder/260600.02 CFNetwork/3886.100.1 Darwin/27.0.0 | 1 |
no JSapple-icon | ||
| 2026-06-22 19:54:14.594 UTC | Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.36 Edg/149.0.0.0 | 20 |
JS ranCSSJSmoduleimgfontcss-bgcss-fontfaviconmanifestpreloadprefetchiframeiframe-img@importCSP reportreport-api | ||
| 2026-06-22 19:31:51.328 UTC | Mozilla/5.0 (iPhone; CPU iPhone OS 27_0 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/24A5355q Twitter for iPhone/12.1 | 0 |
no JS— | ||
| 2026-06-22 19:26:23.507 UTC | Mozilla/5.0 (compatible; MSIE 10.0; Windows Phone 8.0; Trident/6.0; IEMobile/10.0; ARM; Touch; NOKIA; Lumia 920) | 0 |
no JS— | ||
| 2026-06-22 19:05:23.364 UTC | Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/148.0.0.0 Mobile Safari/537.36 | 0 |
no JS— | ||
| 2026-06-22 18:52:40.138 UTC | Mozilla/5.0 (iPhone; CPU iPhone OS 18_7 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/15E148 [LinkedInApp]/9.32.1536 | 18 |
no JSCSSJSmoduleimgfontcss-bgcss-fontmanifestpreloadiframeiframe-img@importCSP reportreport-api | ||
| 2026-06-22 18:40:49.623 UTC | Mozilla/5.0 (iPhone; CPU iPhone OS 26_5_0 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) EdgiOS/149.0.4022.68 Version/26.0 Mobile/15E148 Safari/604.1 | 20 |
no JSCSSJSmoduleimgfontcss-bgcss-fontfaviconapple-iconmanifestpreloadiframeiframe-img@importCSP reportreport-api | ||
| 2026-06-22 18:23:40.426 UTC | Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Mobile Safari/537.36 | 21 |
JS ranCSSJSmoduleimgfontcss-bgcss-fontfaviconapple-iconmanifestpreloadprefetchiframeiframe-img@importCSP reportreport-api | ||
| 2026-06-22 18:14:33.993 UTC | Mastodon/4.5.10 (http.rb/5.3.1; +https://social.lostinok.com/) Bot | 1 |
no JSog-img | ||
| 2026-06-22 18:11:53.392 UTC | Mozilla/5.0 ua-tracer-verify | 0 |
no JS— | ||
| 2026-06-22 18:11:42.705 UTC | ua-tracer-verify/1.0 | 0 |
no JS— | ||
| 2026-06-22 18:08:05.852 UTC | Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.36 | 19 |
JS ranCSSmoduleimgfontcss-bgcss-fontfaviconmanifestpreloadprefetchiframeiframe-img@importCSP reportreport-api | ||
| 2026-06-22 17:25:53.381 UTC | Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.36 | 0 |
no JS— | ||
| 2026-06-22 17:10:43.995 UTC | Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) HeadlessChrome/138.0.7204.23 Safari/537.36 | 16 |
JS ranCSSJSmoduleimgfontcss-bgcss-fontfaviconapple-iconpreloadprefetchiframe-img@import | ||
| 2026-06-22 17:09:43.769 UTC | okhttp/5.3.0 | 2 |
no JSfaviconapple-icon | ||
| 2026-06-22 16:51:13.585 UTC | Mozilla/5.0 (iPhone; CPU iPhone OS 18_7 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/26.3 Mobile/15E148 Safari/604.1 | 0 |
no JS— | ||
| 2026-06-22 16:15:23.711 UTC | Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/144.0.0.0 Safari/537.36 | 0 |
no JS— | ||
| 2026-06-22 16:10:44.971 UTC | Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/33.0.1750.152 Safari/537.36 | 1 |
no JSfavicon | ||
| 2026-06-22 16:10:39.891 UTC | Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/132.0.0.0 Safari/537.36 | 19 |
JS ranCSSJSmoduleimgfontcss-bgcss-fontfaviconpreloadprefetchiframeiframe-img@importCSP reportreport-api | ||
| 2026-06-22 16:10:38.954 UTC | Mozilla/5.0 (X11; Linux x86_64; rv:83.0) Gecko/20100101 Firefox/83.0 | 0 |
no JS— | ||
| 2026-06-22 16:03:59.692 UTC | Java/21.0.4-beta | 0 |
no JS— | ||
| 2026-06-22 16:03:57.064 UTC | Java/21.0.4-beta | 0 |
no JS— | ||
| 2026-06-22 16:03:56.968 UTC | Java/21.0.4-beta | 0 |
no JS— | ||
| 2026-06-22 16:03:56.764 UTC | Java/21.0.4-beta | 0 |
no JS— | ||
| 2026-06-22 16:00:55.377 UTC | Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/151.0.0.0 Safari/537.36 | 20 |
JS ranCSSJSmoduleimgfontcss-bgcss-fontfaviconmanifestpreloadprefetchiframeiframe-img@importCSP reportreport-api | ||
| 2026-06-22 15:48:46.382 UTC | Mozilla/5.0 (iPhone; CPU iPhone OS 18_7 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/26.5 Mobile/15E148 Safari/604.1 | 0 |
no JS— | ||
| 2026-06-22 15:26:27.002 UTC | Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36 | 0 |
no JS— | ||
| 2026-06-22 15:01:18.742 UTC | Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) HeadlessChrome/138.0.7204.23 Safari/537.36 | 16 |
JS ranCSSJSmoduleimgfontcss-bgcss-fontfaviconapple-iconpreloadprefetchiframe-img@import | ||
| 2026-06-22 15:00:49.925 UTC | okhttp/5.3.0 | 2 |
no JSfaviconapple-icon | ||
| 2026-06-22 14:48:34.498 UTC | Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.36 | 18 |
JS ranCSSJSmoduleimgcss-bgcss-fontfaviconmanifestpreloadprefetchiframe@importCSP reportreport-api | ||
| 2026-06-22 14:43:02.150 UTC | Mozilla/5.0 (iPhone; CPU iPhone OS 18_7 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/15E148 [LinkedInApp]/9.32.1743 | 17 |
JS ranCSSJSmodulefontcss-fontmanifestpreloadiframeiframe-img@importCSP reportreport-api | ||
| 2026-06-22 14:42:01.640 UTC | Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_1) AppleWebKit/601.2.4 (KHTML, like Gecko) Version/9.0.1 Safari/601.2.4 facebookexternalhit/1.1 Facebot Twitterbot/1.0 | 0 |
no JS— | ||
| 2026-06-22 14:39:29.405 UTC | Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.36 | 18 |
JS ranCSSJSmoduleimgfontcss-bgcss-fontfaviconmanifestpreloadprefetch@importCSP reportreport-api | ||
| 2026-06-22 14:38:51.310 UTC | Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.36 | 19 |
JS ranCSSJSimgcss-bgcss-fontfaviconmanifestpreloadprefetchiframeiframe-img@importCSP reportreport-api | ||
| 2026-06-22 14:32:49.852 UTC | Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Mobile Safari/537.36 | 20 |
JS ranCSSJSmoduleimgfontcss-bgcss-fontfaviconapple-iconmanifestpreloadprefetchiframe-img@importCSP reportreport-api | ||
| 2026-06-22 14:32:46.761 UTC | Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Mobile Safari/537.36 | 0 |
no JS— | ||
| 2026-06-22 14:32:00.907 UTC | Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/26.5 Safari/605.1.15 | 18 |
JS ranCSSJSmoduleimgfontcss-bgcss-fontapple-iconmanifestpreloadiframeiframe-img@importreport-api | ||
| 2026-06-22 14:31:54.007 UTC | Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Mobile Safari/537.36 | 21 |
JS ranCSSJSmoduleimgfontcss-bgcss-fontfaviconapple-iconmanifestpreloadprefetchiframeiframe-img@importCSP reportreport-api | ||
| 2026-06-22 14:31:49.643 UTC | Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Mobile Safari/537.36 | 19 |
JS ranCSSJSmodulefontcss-bgcss-fontfaviconapple-iconmanifestpreloadprefetchiframe-img@importCSP reportreport-api | ||
| 2026-06-22 14:31:43.695 UTC | Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/26.5 Safari/605.1.15 | 8 |
no JSCSSJSmodulefontiframereport-api | ||
| 2026-06-22 14:29:39.883 UTC | Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.2 HistoryHound/2.3.7 | 0 |
no JS— | ||
| 2026-06-22 14:29:39.843 UTC | Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.2 HistoryHound/2.3.7 | 0 |
no JS— | ||
| 2026-06-22 14:28:45.386 UTC | Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.36 | 18 |
JS ranCSSJSmodulefontcss-bgcss-fontfaviconmanifestprefetchiframeiframe-img@importCSP reportreport-api | ||
| 2026-06-22 14:27:56.452 UTC | Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/148.0.0.0 Safari/537.36 | 18 |
JS ranCSSJSmoduleimgcss-bgcss-fontfaviconpreloadprefetchiframeiframe-img@importCSP reportreport-api | ||
| 2026-06-22 14:25:31.127 UTC | Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:135.0) Gecko/20100101 Firefox/135.0 | 17 |
JS ranCSSJSmoduleimgfontcss-bgcss-fontfaviconapple-iconpreloadiframeiframe-img@importCSP report | ||
