Why Does Your Website Feel Slow?
FeelsSlow analyzes why a website feels slow to real users and shows the top reasons hurting perceived performance — with clear, actionable fixes.
Find render-blocking scripts, oversized images, font loading issues, layout shift problems, and JavaScript bottlenecks.
Enter any website URL to analyze why it feels slow and get actionable performance fixes
Ready to Fix Your Slow Website
Enter any URL to discover why your site feels slow
What Slows Down Your Website?
Render-Blocking Resources
Detects JavaScript and CSS that prevent content from appearing, delaying first paint and making pages feel sluggish.
Oversized Images
Finds large images slowing down page load, including hero images that delay initial content visibility.
JavaScript Bottlenecks
Analyzes how much JavaScript loads before interaction, identifying scripts that make pages feel unresponsive.
Font Loading Issues
Identifies font files that block text rendering and detects too many font families hurting performance.
Layout Shift & Jank
Detects elements without reserved space that cause pages to jump while loading, hurting user experience.
Above-the-Fold Weight
Measures data loaded before content is visible, highlighting unnecessary assets loaded too early.
How to Fix a Slow Website
Why does my website feel slow?
Websites feel slow due to render-blocking JavaScript and CSS, oversized images, too many font files, excessive third-party scripts, and poor above-the-fold optimization. FeelsSlow analyzes these factors and shows exactly what to fix.
What causes slow page load times?
Common causes include large unoptimized images, render-blocking resources, too much JavaScript executing before the page is interactive, web fonts blocking text rendering, and excessive network requests during initial load.
Why is my website slow on mobile?
Mobile devices have slower CPUs and often use slower network connections. Large images, heavy JavaScript, and too many requests impact mobile performance more severely. FeelsSlow simulates mobile conditions to show real-world performance.