ua-tracer
by Paul Kinlan
ua-tracer
what does a user agent actually fetch, follow & run?
This page just minted a fresh trace id GS6aE5u1. Every asset it references
lives under /r/GS6aE5u1/…, 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 "CopperCometBot/4.8" https://uatracer.com/
…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 100 user agents (paged) →
Recent homepage requests
Newest first. Each row is a single load of / by some user agent.
| Timestamp | User Agent | Assets |
|---|---|---|
| 2026-06-23 17:44:42.416 UTC | Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com) | 0 |
no JS— | ||
| 2026-06-23 17:43:34.445 UTC | Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Mobile Safari/537.36 | 18 |
JS ranCSSJSmoduleimgfontcss-bgcss-fontfaviconapple-iconmanifestpreload@importCSP reportreport-api | ||
| 2026-06-23 17:43:17.361 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 ranCSSJSmoduleimgfontcss-bgcss-fontfaviconapple-iconmanifestpreloadprefetch@importCSP reportreport-api | ||
| 2026-06-23 17:42:54.377 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 ranCSSJSmoduleimgfontcss-bgcss-fontfaviconapple-iconmanifestpreloadprefetch@importCSP reportreport-api | ||
| 2026-06-23 17:42:22.016 UTC | Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Mobile Safari/537.36 | 24 |
JS ranCSSmoduleimgfontcss-bgcss-fontfaviconapple-iconmanifestprefetchiframeiframe-img@importCSP reportreport-api | ||
| 2026-06-23 17:17:20.700 UTC | Mozilla/5.0 (iPhone; CPU iPhone OS 13_2_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.0.3 Mobile/15E148 Safari/604.1 | 0 |
no JS— | ||
| 2026-06-23 17:14:17.396 UTC | Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/78.0.3904.108 Safari/537.36 | 0 |
no JS— | ||
| 2026-06-23 17:14:15.926 UTC | Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/78.0.3904.108 Safari/537.36 | 0 |
no JS— | ||
| 2026-06-23 17:13:33.677 UTC | Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36 | 0 |
no JS— | ||
| 2026-06-23 17:13:32.238 UTC | Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36 | 0 |
no JS— | ||
| 2026-06-23 17:10:52.722 UTC | Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Safari/537.36 | 3 |
no JSJSmodulemanifest | ||
| 2026-06-23 17:07:00.192 UTC | Mozilla/5.0 (iPhone; CPU iPhone OS 13_2_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.0.3 Mobile/15E148 Safari/604.1 | 0 |
no JS— | ||
| 2026-06-23 16:51:47.955 UTC | curl/8.20.0 | 0 |
no JS— | ||
| 2026-06-23 16:51:46.395 UTC | curl/8.20.0 | 0 |
no JS— | ||
| 2026-06-23 16:51:33.831 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 | 19 |
JS ranCSSJSmoduleimgfontcss-fontmanifestpreloadiframe@importCSP reportreport-api | ||
| 2026-06-23 16:48:37.375 UTC | Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Mobile Safari/537.36 | 4 |
no JSCSSfontpreloadprefetch | ||
| 2026-06-23 16:45:52.533 UTC | Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36 | 2 |
no JSJSmodule | ||
| 2026-06-23 16:38:15.383 UTC | Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:152.0) Gecko/20100101 Firefox/152.0 | 2 |
no JSJSmodule | ||
| 2026-06-23 16:15:16.526 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-iconprefetchiframeiframe-img@import | ||
| 2026-06-23 16:14:23.224 UTC | okhttp/5.3.0 | 2 |
no JSfaviconapple-icon | ||
| 2026-06-23 16:06:49.358 UTC | Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36 | 0 |
no JS— | ||
| 2026-06-23 16:02:33.499 UTC | Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.0 Safari/537.36 | 0 |
no JS— | ||
| 2026-06-23 15:43:12.550 UTC | Mozilla/5.0 (compatible; Baiduspider/2.0; +http://www.baidu.com/search/spider.html) | 3 |
no JSJSmodulemanifest | ||
| 2026-06-23 15:36:14.115 UTC | Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/145.0.0.0 Safari/537.36 | 20 |
JS ranCSSJSmoduleimgfontcss-bgcss-fontfaviconapple-iconmanifestpreloadprefetchiframe-img@importCSP reportreport-api | ||
| 2026-06-23 15:28:08.033 UTC | Mozilla/5.0 (Linux; Android 13; 2211133G) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.0 Mobile Safari/537.36 | 0 |
no JS— | ||
| 2026-06-23 15:02:59.721 UTC | Mozilla/5.0 (iPhone; CPU iPhone OS 26_5_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/23F81 Twitter for iPhone/12.1 | 17 |
JS ranCSSJSmoduleimgfontcss-bgcss-fontmanifestpreloadiframe@importreport-api | ||
| 2026-06-23 14:50:03.578 UTC | Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/148.0.0.0 Safari/537.36 | 2 |
no JSJSmodule | ||
| 2026-06-23 14:45:33.064 UTC | Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/148.0.0.0 Safari/537.36 | 19 |
JS ranCSSJSmoduleimgfontcss-bgcss-fontfaviconmanifestpreloadprefetchiframeiframe-img@importCSP reportreport-api | ||
| 2026-06-23 14:45:27.691 UTC | Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.36 | 22 |
JS ranCSSJSmoduleimgfontcss-bgcss-fontfaviconmanifestpreloadprefetchiframeiframe-img@importCSP reportreport-api | ||
| 2026-06-23 14:36:22.845 UTC | TLM-Audit-Scanner/1.0 | 0 |
no JS— | ||
| 2026-06-23 14:36:22.844 UTC | TLM-Audit-Scanner/1.0 | 0 |
no JS— | ||
| 2026-06-23 14:36:22.727 UTC | TLM-Audit-Scanner/1.0 | 0 |
no JS— | ||
| 2026-06-23 14:33:07.297 UTC | Mozilla/5.0 (iPhone; CPU iPhone OS 13_2_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.0.3 Mobile/15E148 Safari/604.1 | 0 |
no JS— | ||
| 2026-06-23 14:31:12.972 UTC | Mastodon/4.5.11 (http.rb/5.3.1; +https://linuxrocks.online/) Bot | 1 |
no JSog-img | ||
| 2026-06-23 14:21:33.063 UTC | Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html) | 0 |
no JS— | ||
| 2026-06-23 14:09:05.563 UTC | Mozilla/5.0 (Linux; Android 6.0; Nexus 5 Build/MRA58N) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Mobile Safari/537.36 | 5 |
no JSCSSJSmoduleimgmanifest | ||
| 2026-06-23 14:06:25.994 UTC | Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_3) AppleWebKit/534.55.3 (KHTML, like Gecko) Version/5.1.3 Safari/534.53.10 | 0 |
no JS— | ||
| 2026-06-23 13:55:22.662 UTC | Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html) | 7 |
no JSCSSmodulefaviconapple-iconprefetchiframe@import | ||
| 2026-06-23 13:55:22.526 UTC | Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html) | 8 |
no JSCSSJSmodulefaviconapple-iconprefetchiframe@import | ||
| 2026-06-23 13:55:22.406 UTC | Mozilla/5.0 (Linux; Android 6.0.1; Nexus 5X Build/MMB29P) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/99.0.4844.84 Mobile Safari/537.36 (compatible; Googlebot/2.1; +http://www.google.com/bot.html) | 6 |
no JSCSSmodulefaviconapple-iconiframe@import | ||
| 2026-06-23 13:55:22.331 UTC | Mozilla/5.0 (Linux; Android 6.0.1; Nexus 5X Build/MMB29P) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/99.0.4844.84 Mobile Safari/537.36 (compatible; Googlebot/2.1; +http://www.google.com/bot.html) | 8 |
no JSCSSJSmodulefaviconapple-iconprefetchiframe@import | ||
| 2026-06-23 13:55:18.572 UTC | Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko); compatible; ChatGPT-User/1.0; +https://openai.com/bot | 0 |
no JS— | ||
| 2026-06-23 13:55:18.368 UTC | Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko); compatible; ChatGPT-User/1.0; +https://openai.com/bot | 0 |
no JS— | ||
| 2026-06-23 13:55:17.159 UTC | Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36; compatible; OAI-SearchBot/1.4; +https://openai.com/searchbot | 32 |
JS ranCSSJSmoduleimgfontcss-bgcss-fontfaviconapple-iconmanifestpreloadprefetchiframeiframe-img@import | ||
| 2026-06-23 13:55:08.778 UTC | Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko); compatible; ChatGPT-User/1.0; +https://openai.com/bot | 0 |
no JS— | ||
| 2026-06-23 13:13:36.344 UTC | Mozilla/5.0 (Linux; Android 6.0; Nexus 5 Build/MRA58N) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Mobile Safari/537.36 | 7 |
no JSCSSmoduleimgfontapple-iconmanifestpreload | ||
| 2026-06-23 13:04:45.133 UTC | Mozilla/5.0 (X11; Linux x86_64; rv:142.0) Gecko/20100101 Firefox/142.0 | 1 |
no JSfavicon | ||
| 2026-06-23 12:57:51.552 UTC | Mozilla/5.0 (iPhone; CPU iPhone OS 16_6_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.5 Mobile/15E148 Safari/604.1 | 19 |
JS ranCSSJSmoduleimgfontcss-bgcss-fontfaviconpreloadprefetchiframeiframe-img@importCSP reportreport-api | ||
| 2026-06-23 12:57:49.927 UTC | Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/139.0.0.0 Safari/537.36 | 0 |
no JS— | ||
| 2026-06-23 12:57:49.174 UTC | Mozilla/5.0 (iPhone; CPU iPhone OS 16_6_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.5 Mobile/15E148 Safari/604.1 | 0 |
no JS— | ||
