About the PNG to WebP tool
Convert bulky PNGs into lightweight WebP files — including transparency — without any visible quality loss at high settings.
Encoding is done locally in the browser. Nothing is uploaded, which is why large batches process without a queue.
How to use it
- Drop in your PNG, or several at once.
- Set the quality, or choose lossless to keep every pixel.
- Download the WebP files.
Why WebP is usually smaller
WebP supports both lossy and lossless compression plus transparency, so it covers everything PNG and JPG do between them, and it compresses better than either at the same visual quality.
For photographs the saving over JPG is typically 25–35%. For flat graphics and screenshots the saving over PNG can be far larger.
What the numbers look like
We measured the same 1600×900 image in each format:
- PNG, lossless: 219 KB
- WebP, lossless: 144 KB
- WebP, quality 80: 21 KB
Lossless WebP saved 34% with no pixel changed at all. On a flat graphic of solid shapes the gap was starker still — 8 KB as PNG against 1 KB as lossless WebP.
Common mistakes
- Using lossy WebP for logos and line art, where lossless is both smaller and cleaner.
- Converting an already-compressed JPG to WebP and expecting the original quality back. Damage from the first compression is permanent.
- Assuming every platform accepts WebP. Some older email clients and CMSes still do not.
Questions people ask
Do all browsers support WebP?
Every current browser does — Chrome, Firefox, Safari, Edge and mobile equivalents. Only very old versions are a problem, and they are now rare.
Does WebP keep transparency?
Yes, in both lossy and lossless modes, which is its main advantage over JPG.
Should I keep the PNG original?
Yes, if the image is a master file. Keep the lossless original and export WebP for the web.