Convert PNG to WebP
Output is typically about 85% smaller.
- Files stay on your device
- Free, no sign-up
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Should I be using lossless WebP instead?
For logos, icons and screenshots, lossless WebP is often the better answer — still meaningfully smaller than PNG, with no quality question at all. This converter uses WebP's lossy mode with a quality slider, so push quality to 100 to get close to that behaviour, or keep the PNG if exactness matters more than the last few kilobytes.
Will converting PNG to WebP make the file smaller?
Usually, yes. A 12-megapixel photo is around 14 MB as PNG and around 2.1 MB as WebP — about 85% smaller. Because WebP is lossless the result depends entirely on the image content — flat colour and text compress far better than photographic detail.
Does converting PNG to WebP lose quality?
A little, by design. PNG is lossless and WebP is lossy, so some detail is discarded in exchange for a much smaller file. At quality 80–90 the result is visually indistinguishable from the original for photographs. For screenshots, logos or anything with sharp text, stay with a lossless format instead — lossy compression creates visible halos around hard edges.
Is transparency preserved when converting PNG to WebP?
Yes. Both PNG and WebP support an alpha channel, so transparent and semi-transparent pixels carry across unchanged — a logo with a cut-out background stays cut out, and soft drop shadows keep their gradient rather than picking up a white halo. Because WebP can compress lossily, a very hard edge against transparency may pick up slight softness at high compression; keep quality at 85 or above for cut-out graphics.
Is WebP safe to use on a live website?
Yes. Every browser in current use supports it — Chrome since 2014, Firefox since 2019, and Safari since version 14 in 2020. Coverage is above 97% of global traffic. The remaining gap is older desktop software and some print workflows, so keep a JPEG or PNG original if the image also has to leave the web.
How it works, and more about png to webp
How it works
- Add your PNG file. Drag a PNG file onto the drop zone, or click to browse. You can select several at once.
- Choose your settings. Adjust the quality slider if you want a smaller file or a sharper result. 80 suits most photographs.
- Download the WebP. Conversion runs on your device as soon as each file is added — no upload, no queue. Download each result when it is ready.
Why people convert PNG to WebP
This is usually a developer or site owner cutting page weight. PNG is the right format for a logo or UI asset and a poor one to ship over the network, and WebP is the drop-in replacement that keeps everything PNG gave you.
Convert and ship it. WebP keeps the full alpha channel, so cut-out logos and soft drop shadows survive intact, and support has been universal since Safari 14 in 2020. For flat UI assets use a high quality setting — 90 or above — because WebP's lossy mode is tuned for photographs and can soften a one-pixel border.
Worth knowing: Keep the PNG as your master. If you later need a different size, re-exporting from the WebP means compressing already-compressed data.
PNG and WebP side by side
| PNG | WebP | |
|---|---|---|
| Full name | Portable Network Graphics | WebP |
| Compression | Lossless | Lossy or lossless |
| Transparency | Yes — alpha channel | Yes — alpha channel |
| Animation | No | Yes, in the format |
| Browser support | Universal — every browser since 1996 | All modern browsers — Chrome 32+, Firefox 65+, Safari 14+ (2020), Edge 18+ |
| Typical 12 MP photo | ~14 MB | ~2.1 MB |
| Usually used for | Screenshots, logos, icons, diagrams and anything needing transparency | Web images where page weight matters and modern browsers are the audience |
On a typical 12-megapixel phone photo, the WebP output comes out about 85% smaller than the PNG original. These are order-of-magnitude figures for one kind of image — your own results will vary a great deal, because flat colour, text and line art behave nothing like photographic detail, and the quality slider moves the figure substantially.
What this tool actually produces
Not estimates. Each row below was produced by running the file through this page in a real browser and measuring the result, at the default quality of 82.
| Test image | PNG in | WebP out | Change |
|---|---|---|---|
| Smooth gradient 1600 × 1200, broad tonal transitions — where banding and blocking show | 1.8 MB | 198 KB | -89% |
| UI screenshot 1440 × 900, dense text on flat panels — the hardest case for JPEG | 97 KB | 47 KB | -52% |
| Line-art diagram 1200 × 800, hard edges and large flat areas | 19 KB | 15 KB | -21% |
| Logo with transparency 512 × 512, flat colour on a transparent background | 77 KB | 8 KB | -90% |
Every test image got smaller, though by very different margins — flat colour and text behave nothing like photographic detail, so treat the closest row to your own content as the useful one. Measured in Chrome 150.0.7871.46; other browsers encode slightly differently.
What to watch out for
- Not accepted by some older desktop software and print workflows
- Slightly slower to encode than JPEG
- Larger than AVIF at the same quality
About the two formats
PNG stores every pixel exactly as it was, with no generation loss no matter how many times you re-save it. That fidelity is why it dominates screenshots, logos and UI assets, and also why it is the wrong choice for photographs — lossless compression simply cannot get a 12-megapixel photo down to a reasonable size.
WebP is the pragmatic modern choice for the web: roughly 25–35% smaller than JPEG at comparable quality, with transparency and animation that JPEG lacks, and — since Safari 14 in 2020 — support in every browser that matters. It is the format to reach for when you want smaller pages without worrying about fallbacks.
Other conversions
Everything runs on your device — nothing is uploaded, so there is no size limit, no queue and no copy left on a server afterwards. There is more on how browser-based conversion works if you want the detail. Otherwise, browse every image tool, or convert WebP back to PNG.