Performance Tools

Page Size Checker

Measure how large a page's HTML response is.

Measures the HTML response only - does not fetch linked CSS, JS, or images.

Not sure what to enter? Try an example: wikipedia.org

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Medium

wikipedia.org

HTML Response Size

119.3 KB

Download Size

122,197 bytes

Last checked: 3 minutes ago Cached

Download JSON Download PDF

100/100

Result Summary

Passed

HTML response size is reasonable

Enter a URL to measure the size of the HTML document the server sends (images, CSS and scripts are loaded separately).

How big should a web page be?

This checker measures the size of the HTML document the server returns for a page. Lean HTML is usually well under 100 KB; much larger documents often contain inlined data, repeated markup or unused code that slows the first render, especially on mobile connections.

How to check a page's size

Enter the domain or URL in the box above.
Click Check Page Size.
Compare the HTML size with the compressed transfer size.
Reduce large documents by enabling compression, removing inline data and lazy-loading below-the-fold content.

Related checks

To check the page's images, use the Image Optimization Checker.
To shrink HTML, use the HTML Minifier.

Large pages are usually caused by oversized images, unused fonts and third-party scripts - start with the biggest file on the list. JustChecker tracks load times so you can see when a new plugin or banner makes the site heavier.