Add up your assets and see the load time

Web developers and site owners use it when a page feels slow and the real contribution of each asset needs to be understood.

Add up your assets and see the load time. No registration is needed to obtain a clear output that is ready for real work.

How to use

Enter your connection bandwidth in megabits per second.
List each asset on its own line, with a name and a weight in kilobytes.
Run the calculation to get total weight and estimated load time.
Identify the heaviest assets so you can decide what to optimise.

Example

A site owner wants to understand why a homepage feels slow. They enter a bandwidth of 10 megabits per second, then list style.css at 45 kilobytes, app.js at 120 and photo.jpg at 300. The result shows which assets contribute most. They can then decide to compress images or defer a script.

Input

10
style.css ; 45
app.js ; 120
photo.jpg ; 300

Limits and formats

The load time is an estimate based on the bandwidth you enter, not a real measurement.
The asset list must be complete or the total will be underestimated.
Latency, hosting and parallel connections are not modelled in detail.
Check the units and the separator expected between name and weight.
The figures are indicative and do not replace a network analysis.

Where processing happens

Your bandwidth and asset list are processed in the browser. No external request is made to measure the page. The result appears locally and is not stored after you leave.

Frequently asked questions

Is the displayed load time exact?

No, it is an estimate from the bandwidth and weights you provide. Real conditions include latency, compression and parallel downloads. Use the figure to compare scenarios rather than as a final measurement.

How should I separate names and weights?

The interface expects a semicolon between the asset name and its weight in kilobytes. Keep each asset on a separate line. A malformed line can distort the total.

Should I include every asset?

Yes, a complete list gives a more useful total. Include images, scripts, stylesheets, fonts and third-party files. If a heavy asset is missing, the estimate will look better than reality.