PNG to WebP Converter
Turn a PNG into a much smaller WebP that keeps its transparent background, in your browser, with nothing uploaded.
Results
New file size
205.1 kB
It was
820.3 kB
Difference
615.2 kB
Saved
75.0
%
Smaller or bigger
Smaller
What this tool does
WebP was designed by Google to replace both JPEG and PNG on the web, and a screenshot, logo or illustration saved as WebP is often several times smaller than the PNG, with the transparency intact. Smaller images load faster, and page speed is something search engines measure. At 85 % quality the difference is hard to see; push towards 100 % for text and sharp edges, down to 70 % for photos. Every current browser shows WebP, but some print shops, older office software and email clients still expect PNG, so keep the original.
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
- Quality85 %
- Original size, in bytes840,000
- New size, in bytes210,000
- New file size205.1 kB
- It was820.3 kB
- Difference615.2 kB
- Saved75.0 %
- Smaller or biggerSmaller
Limitations
- The calculation runs entirely in your browser. The values you type are never sent to a server.