Does the transparency survive?
Yes. WebP holds see-through pixels, so a transparent PNG converts with its transparency intact; that is the difference between this door and PNG to JPG, where the transparent parts have to be painted over a colour.
Image tools · convert
PNG to WebP
A PNG on a website is weight the page did not need. This door converts one PNG to a WebP, here in your browser: usually far smaller, and with the transparency kept, which is the thing JPG cannot do. It is a lossy write at the quality you pick, so the PNG stays your master copy. A whole folder at once is the batch convert page; the reverse trip is WebP to PNG.
For one PNG headed for a website: a product cutout, a screenshot, an overlay that must stay see-through and load fast.
- 01
Pick a PNG
- 02
Set the quality
- 03
Download the WebP
Drop a PNG on the tray, or click to pick one
PNG in · WebP out · it stays on this device
What changes
The weight changes, and the transparency does not: WebP holds see-through pixels, so your cutout stays a cutout. At the quality here the write is lossy, so fine edges soften a little; the PNG remains the exact master, and the result line prints the saving.
Higher keeps more detail and more bytes. 90 is a good all-round setting.
File spec
- file
- none picked yet
Pick a PNG to begin.
How it works
The PNG is decoded by the open-source jSquash codecs and written as a WebP at your quality, transparency included, the same engine the batch convert page runs. The first run loads the image program (about 2 MB, one time only). The download is how we protect your privacy: the program comes to your device and does the work there, so your file never leaves it.
Honest limits
Lossy means lossy: at a low quality, sharp edges and text in screenshots soften, and the thrown-away detail does not come back. Flat-colour graphics sometimes barely shrink, because a small PNG was already efficient; the result line shows the number either way. And WebP belongs on screens: older editors and print queues may still refuse it.
Questions
How much smaller will it be?
For photos and busy pictures, usually a lot: PNG writes every pixel exactly, WebP at the quality here writes a close approximation. Graphics with a few flat colours may already be small as PNG and shrink less. The result line prints your before and after, so the claim is your own number, not ours.
Is the conversion lossless?
No, and the page says so plainly: this door writes WebP at the quality you pick, which is a lossy write. Your PNG is the exact master; keep it if the picture has to stay exact.
Where does my file go?
Nowhere. It is decoded, re-encoded and offered back to you inside this page. Nothing is uploaded.