Check how heavy a page is
Type a page address. We time the server's first response, measure the HTML and count the scripts, stylesheets and images in it, with simple fixes. It is not Lighthouse and does not render the page. Free, no account.
What this measures, and what it does not
- Server's first response: the time from our server opening the connection to the first response from yours, including TLS. It is measured once, from one place, so treat it as a rough signal.
- HTML size: the page's own HTML, read uncompressed. It is not the size of the whole page.
- Counts: scripts, stylesheets, images and frames found in the HTML. Things added by JavaScript are not seen.
- It is not Lighthouse. Nothing is rendered or run, and images, CSS and fonts are not downloaded, so it cannot say how fast the page feels. That is why it is called a weight checker and not a speed test.
- The address is parsed first: http and https only, ports 80 and 443 only, no usernames, no IP addresses and no internal names such as localhost. Anything else is refused before any request.
- The name is resolved and every address it points to must be public. Private, loopback, link-local (cloud metadata included), multicast and reserved addresses are refused, and the connection goes to the address that was checked.
- One GET is sent, reading at most 1500 KB, with a 8-second budget; redirects are followed by hand and re-checked at every hop.
Using it before a pitch
A slow server and a pile of scripts are things an owner can understand. Run the page, pick one or two facts and say what you would change, without promising a speed or a ranking. To find sites, search 67Leads by trade and city, or start from businesses with no website.
Get 67 leads free No card. Search free with contacts masked.
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Questions
No. It does not render the page or run scripts. It times the server's first response and counts what is in the HTML. For how a page loads for a visitor, use PageSpeed Insights or Lighthouse.
web.dev treats a time to first byte of 800 ms or less as good. Ours is measured once from our server, so repeat it and treat it as a rough signal.
It counts only the HTML document. Images, CSS, scripts and fonts are separate downloads that this tool does not make.
Without them the browser cannot reserve space before an image loads, so the content can jump. Adding the two attributes is a small fix.
No. Each address gets one live request; the page and the results are not saved, cached or indexed.
No. It fills templates with what you type and makes no network calls.
No. The result is written when the page is served and not saved.
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