The googlebot crawl size works like this: it measures a page's HTML weight against Googlebot's 500 KB crawl limit, with a visual budget bar. Everything happens on your device - the input never leaves your tab unless the tool clearly states it performs a server-side lookup.
How to use the Googlebot Crawl Size
Enter the full URL, domain or content the tool asks for.
Run the check - fetch-based tools query the page server-side.
Read the findings as a list, not a single score.
Fix one issue at a time and re-run to verify.
Features
Checks run server-side so protected pages can be read
Results explain the rule or value behind every finding
Copy and export options for every result list
No account needed for any check
Common mistakes to avoid
Auditing a staging or password-protected URL instead of production
Fixing everything at once instead of one change plus re-test
Treating any single score as a ranking promise
Examples
Input
Result
A 640 KB product page
Over budget - content after ~500 KB risks being invisible to Google
Best used for
Getting a reliable answer for googlebot crawl size without installing an app
One-off tasks done in under a minute from any device
Checking results before committing them to something important
Working on a phone where desktop software is unavailable
Privacy
The URL you check is fetched once so the tool can read pages that block cross-origin browser requests. No browsing history is stored, and nothing from your own device is transmitted.
Frequently asked questions
Do images and scripts count?
Against THIS limit, no - only the HTML document itself. But they hit Core Web Vitals instead, so the fix list is similar: inline less, lazy-load more.
What is the 500 KB crawl limit?
Googlebot caps how much HTML it downloads per page - content beyond it may be deprioritised. The tool measures your page's HTML weight against that budget with a visual bar.
Does the limit count images and scripts?
No - it applies to the HTML document itself. Referenced assets are fetched separately, so the budget you are checking is markup size.