Raw HTML Size
Measures the exact byte size of the HTML document returned by the server, the same payload a browser receives before it starts loading external resources.
Website Page Size Checker
Check the HTML document size of any URL in seconds and find out if it is slowing your site down.
Guide
How to Check Page Size
1
Enter the URL
Paste any webpage URL into the input field.
2
Click Check Size
Click Check and the tool measures total bytes loaded.
3
Read the Result
See the page weight, request count, and breakdown by file type.
Slim Pages Convert Better
Every extra megabyte costs you mobile conversions. The page-size checker measures total bytes loaded, breaks them down by file type, and shows the request count so you know whether your bottleneck is images, scripts, or fonts.
Run it on your homepage, top blog posts, and key landing pages every quarter. Anything over 3 MB on mobile is a conversion problem.
Benefits
What This Tool Measures
Instant Rating
Results are color-coded: green for under 100 KB (excellent), amber for 100-500 KB (average), and red for over 500 KB (heavy), so you know at a glance if action is needed.
Any Public URL
Works with any publicly accessible URL, your own pages, competitor sites, landing pages, blog posts, or any web address you want to benchmark.
Bytes, KB, and MB
Results are shown in three units so you can compare across tools and reports. The KB figure is the most useful for SEO and performance benchmarking.
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FAQ
Frequently Asked Questions
Common questions about web page size and performance.
What does "page size" mean for SEO?
Page size refers to the amount of data a browser must download to display a page. Large HTML documents take longer to download, parse, and render. Google uses page speed as a ranking factor, so reducing unnecessary HTML can improve both Core Web Vitals scores and search rankings.
Does this tool measure images, CSS, and JavaScript too?
No. This tool measures only the size of the raw HTML document, the initial server response. It does not include images, stylesheets, fonts, or JavaScript files loaded after the HTML is parsed. For a full page weight analysis including all assets, use a tool like Google PageSpeed Insights or WebPageTest.
What is a good HTML page size?
Google recommends keeping the HTML document under 15 KB for ideal performance. Pages under 100 KB are considered excellent. Between 100 and 500 KB is average. Anything above 500 KB suggests bloated inline scripts, excessive DOM nodes, or large amounts of inline content that should be externalised.
How can I reduce my HTML page size?
Common ways to reduce HTML size include: removing unused inline CSS and JavaScript and loading them as external files, enabling server-side gzip or Brotli compression, reducing the number of DOM elements, removing HTML comments in production, and avoiding large base64-encoded images embedded directly in the HTML.