Image Delivery Optimizer
Estimated delivered size and saving for your image.
Runs in your browser. Nothing is uploaded — your input is processed on this device and discarded when you close the tab.
Image Delivery Optimizer
How to use this tool
- Enter your values in the fields above.
- Press Generate to see the result.
- Use Load sample to try the worked example, Copy result to copy it, or Clear to start again.
Worked example
An 800 KB image at 2000 px wide, shown at 1000 px in WebP, is estimated at 140 KB, a saving of 660 KB (82.5%).
What this tool does not do / Limits
This is an estimate from the numbers you enter, using area scaling and a fixed format factor. It does not compress a real image, measure quality, or guarantee the same saving for every picture.
Frequently asked questions
Why does halving the width cut the size by so much?
Pixels fall with the square of the width, so half the width means about a quarter of the pixels before the format factor is applied.
Is the estimate exact?
No. Real savings depend on image content, encoder settings and quality, so treat the figure as a planning estimate only.
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