Find out what makes your website heavy
Scan any public URL and get a clear report showing which images, JavaScript, CSS, fonts, videos and PDFs add the most weight to your page — and how much you could save by optimizing them.
What this test checks
A clear report on what weighs your page down
See which public files add the most bandwidth cost and where optimization can make the page lighter.
See your total page download size
Measure the combined weight of public files found on the tested page.
Find the heaviest files
Rank individual assets so the biggest bandwidth problems are easy to spot.
Spot oversized images, JS, CSS, fonts, videos and PDFs
Review the file types that commonly add unnecessary page weight.
Estimate potential savings after optimization
Compare original files with optimized versions and see possible size reductions.
Get a clear asset report you can act on
Use the report to decide which files to optimize, replace or move to a better delivery workflow.
Website tester FAQ
What does this website tester check?+
Why does it show 1st load and 2nd load?+
What should I look for in the waterfall?+
Is this a general performance score?+
Do I need to create an account?+
Will Smooth CDN change my website?+
Turn asset delivery into a smoother workflow
Find asset weight and loading-time issues before they turn into frontend performance work.