Test Your Website Speed & Performance
Test website speed and front-end performance issues across real browsers and devices.
Run a quick test to identify performance bottlenecks and Core Web Vitals impacting your site.
Trusted by more than 50,000 customers globally
Why Use Website Speed Test?
BrowserStack Website Speed Test helps developers and QA teams quickly detect performance bottlenecks, evaluate page speed, and improve overall website performance. It was previously known as SpeedLab.
Get clear insights into your Core Web Vitals
- Track key metrics like LCP, CLS, and FCP across every page of your site in a single scan
- Pinpoint underperforming pages with severity-based filtering
- Turn raw performance data into actionable fixes that directly improve SERP rankings and reduce drop-off
Instantly add all pages via your sitemap
- Upload your sitemap once and let the scanner automatically crawl every page
- Selectively scan specific sections of your sitemap, giving teams flexibility to focus on high-priority areas
- Ensure no page is missed in your performance audits, from top-level pages down to nested content
Uncover site health issues with granular reports
- View a comprehensive health snapshot for your entire site in one consolidated report
- Identify which pages are dragging down your overall site score, allowing teams to unify their efforts
- Export and share reports across stakeholders to keep everyone aligned on performance goals
Run performance tests on autopilot
Instant Setup
Start testing instantly, no coding complexity or setup required.
Staging Environment
Catch performance issues in pre-production before they reach live users.
Scheduled Scans
Automate performance tests to run daily, weekly, or monthly.
Authentication Testing
Scan protected pages by configuring credentials, cookies, or auth methods.
Alerts & Notifications
Get notified via Slack, Teams, or email when scans complete.
AI Enabled
Manage performance issues 3x faster with built-in AI capabilities.
Over 50,000 companies trust Browserstack
Piotr Kowalczyk @piotrek_web Thank you god for @browserstack <3 Css magic...#Apple #testing #programming #FrontEnd 
Luis H. Ball Jr. @luqven @browserstack Local appreciation tweet 🥰 Browser’s refusal to ship meaninful JS feature flags makes it necessary to be able to test on older versions.Local makes that a breeze ⛵. 
Fatih Battal @fatihtweeting @browserstack I love you😘 Nothing more. That's it. 
Kevin Basset @kvnbsst Big fan of @browserstack for cross-browser testing. If you're building a #PWA, it's an absolute must-have. #nocode #iphone #safari #web #browser 
Rajendra Kadam @rajendra_ak Use @browserstack to automate tests on many more devices than those in your farm. 
Code With Caen @CodeWithCaen Trying out @browserstack and am completely blown away. Currently playing around with visual testing using Percy. Super excited I got a sponsored #opensource plan too! 
