JPG to WebP Converter
Convert JPEG photos to WebP, usually 25 to 35 % smaller at the same visual quality, in your browser.
Results
New file size
400.4 kB
It was
605.5 kB
Difference
205.1 kB
Saved
33.9
%
Smaller or bigger
Smaller
What this tool does
For photographs WebP typically saves about a quarter to a third of the file size against a JPEG of similar quality, which adds up quickly on a page full of images or a product catalogue. The gain depends on the picture: smooth skies and skin compress very well, fine noise and grain less so. Converting does not recover detail the JPEG already threw away, so start from the best JPEG you have and avoid going back and forth between lossy formats. Around 80 % quality is a good starting point; compare the before and after sizes shown here.
Formula
difference = (size before − size after) ÷ size before
Variables
| Symbol | Meaning | Unit |
|---|---|---|
quality | Quality | % |
bytes_in | Original size, in bytes | — |
bytes_out | New size, in bytes | — |
OUT | New file size | — |
BF | It was | — |
SV | Difference | — |
PC | Saved | % |
DR | Smaller or bigger | — |
Worked example
- Quality82 %
- Original size, in bytes620,000
- New size, in bytes410,000
- New file size400.4 kB
- It was605.5 kB
- Difference205.1 kB
- Saved33.9 %
- Smaller or biggerSmaller
Limitations
- The calculation runs entirely in your browser. The values you type are never sent to a server.