1
Move data out of the HTML
Large inline JSON or base64 images belong in separate, cacheable files rather than in the document.
Performance
Page weight checker
Measure the HTML weight of a page in kilobytes.
Sample result Under threshold
moveinsights.co.uk
HTML document size
HTML size 182 KB
Threshold 500 KB
182 KB
HTML document
Comfortably under the 500 KB threshold.
36%
Your result
What this checks
How heavy the HTML really is
Page weight is how much a browser has to download to render a page. This tool measures the HTML document itself, which is the part bloated templates, inline data and tracking snippets tend to swell.
It fetches the URL and reports the HTML size in kilobytes, and flags it when the document is heavier than a sensible threshold.
Why it matters
Weight slows the page and the rank
Heavy pages load slowly on mobile, and slow pages lose visitors and rank worse, so a bloated document is a direct drag on performance and SEO.
A sudden jump in HTML size often means an inline script, an embedded data blob or a runaway page builder, all of which are worth catching early.
How to fix it
Trim the document down
2
Trim the template
Page builders and heavy themes can output huge markup. Prune unused sections and blocks.
3
Enable compression
Serve HTML with gzip or brotli so the bytes on the wire are a fraction of the raw size.
One of around two dozen checks
Page weight checker is one check
Janitor watches page weight automatically across every client site and puts it in a branded report you can send.
Keep reading
Related tools and guides
FAQ
Page weight checker FAQ
Does this measure the whole page?
No. It measures the HTML document only, not images, CSS, JavaScript or fonts. The HTML is the part that is quickest to read and most often quietly bloated.
What is a reasonable HTML size?
Most well-built pages sit comfortably under a few hundred kilobytes of HTML. Far above that usually points to inline data or template bloat.
Can Janitor track this over time?
Yes. Janitor records page weight on every client site, so a regression after a content or plugin change shows up in the report.
Get started
Check it once, or watch it for every client
Janitor runs around two dozen checks on every site you manage and turns them into a branded report.
30-day free trial. No credit card required.