calculator · image compression calculator
Estimate how much smaller an image might become before you run an actual browser-based compression test.
How to use it
Estimated result
2.13 MB
Estimated savings
57.5%
This is an estimate. Real results depend on image detail, dimensions, transparency and browser export support.
The calculator uses conservative format multipliers to estimate compression size. It does not inspect your image and cannot know its detail, noise or transparency.
After estimating, use the image compressor to test the real file locally in your browser.
Estimates help when you need to decide whether resizing, WebP output or a lower quality setting is likely to meet an upload limit.
They are less useful for exact byte targets, because two images with the same original size can compress very differently.
No. The calculator only works from the file size and settings you enter.
No. Use it for planning, then run an actual compression pass to confirm the result.
Updated September 4, 2026 · Source checked: 2026-09-04
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