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Best User Agents for Web Scraping in 2026

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The best user agent for web scraping is a current desktop Chrome 151 string for Windows. Chrome holds around 69% of the global browser market (StatCounter, June 2026), so it is the least conspicuous choice – pair it with current Firefox, Edge, and mobile strings, plus matching headers like Accept-Language and Sec-CH-UA.

Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/151.0.0.0 Safari/537.36

A server reads the User-Agent header on every request to decide what content to serve and to flag automated traffic. Python libraries give a scraper away immediately: requests announces itself as python-requests/2.x, and httpxsends its own obvious default, so both often trigger blocks and CAPTCHAs before the first page loads. This guide covers the best user agent for scraping across every major browser and operating system, the matching headers each web scraper needs, how to set and rotate a UA for scraping in Python,...

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