Mozilla/5.0 (Windows NT 6.1 WOW64) AppleWebKit/534+ (KHTML, like Gecko) BingPreview/1.0b ![]() Mozilla/5.0 (iPhone CPU iPhone OS 7_0 like Mac OS X) AppleWebKit/537.51.1 (KHTML, like Gecko) Version/7.0 Mobile/11A465 Safari/9537.53 (compatible bingbot/2.0 +) The Facebook crawler which prefetches a page to generate a preview of the page which usually consist of title, short description and thumbnail image. Used for the PageSpeed Insights service Headless Chromium User-Agent samples Expected use cases include loading web pages, extracting metadata (e.g., the DOM) and generating bitmaps from the page contents.Į.g. ![]() Headless Chromium allows running Chromium in a headless/server environment. Mozilla/5.0 (Linux Android 7.0 SM-G930V Build/NRD90M) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/.125 Mobile Safari/537.36 (compatible Google-Read-Aloud +) Mozilla/5.0 (Linux Android 6.0.1 Nexus 5X Build/MMB29P) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/1.130 Mobile Safari/537.36 (compatible Googlebot/2.1 +) Some of them even include two variants - desktop and mobile.īeware that due to its popularity there might be other services pretending to be the Googlebot or there might be individuals trying to get past the paywalls. That includes Googlebot, Google Ads bot, Google-Read-Aloud bot and others. There is no surprise that most crawling requests are coming from Google bots. The most popular variant seems to be version 4.9.2 and version 3.12.10 where the latter one is around two years old. Each request might have a different purpose as anybody can incorporate this library by their own means. Not a crawler as such but the most spread HTTP library generating non-human traffic. User-Agents of most active crawlers OkHttp library HTTP libraries like Requests, HTTPX or AIOHTTP HTTP library for Android and Java applicationsīrowser operated from command line / server environment Search engine, checker and many other services It’s a combination of normalized traffic and “popularity” of the crawlers within our user base. It is not to be interpreted as traffic directly due to the caching mechanism used by the Cloud Service clients which might favor services using various User-Agent versions. Names of the most active crawlers, bots and other non-human traffic on the web as seen by our device detection Cloud Service. Wget, cURL (also integrated as a library by other languages) Scarpy, Pyspider, Crawlee, Heritrix, Web-Harvest, Apify, MechanicalSoup, Apache Nutch, Node Crawler and many, many more… Google, Bing, Yahoo, DuckDuckGo and others… There are also many open source engines available with interesting features such as ability to simulate human behavior, rate control, distributed architecture or parsing of various document formats. Those engines include the ability to scale, sophisticated logic to crawl the site without causing any impact and to store and process massive data sets. The most common crawlers hitting any site are in-house scraping engines like Google, Bing or DuckDuckGo. They are most commonly used to index websites for search engines, but are also used for other tasks such as monitoring online content, validating HTML code, testing web performance and feeding language models. Web crawlers, also known as web spiders or bots, are automated programs used to browse the web and collect information about websites.
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