PNG to WebP Converter
Keep the transparency, lose most of the file size.
Free · No watermark · Private — your image never leaves your browser
Soft shadows, feathered cut-outs and anti-aliased edges all survive intact — WebP supports 8-bit transparency exactly as PNG does.
Lossless for screenshots and flat graphics where every pixel matters, lossy for photographic content where a fraction of the size is worth an invisible difference.
Images are usually the heaviest thing on a page. Cutting them by 70 percent moves Largest Contentful Paint measurably, which feeds directly into search ranking.
How it works
If you're using PNG on a website purely because you need transparency, WebP is almost certainly the better choice. It supports the same alpha channel, renders identically, and produces files a fraction of the size — commonly 70 to 90 percent smaller for images with photographic content, and 20 to 30 percent smaller even in fully lossless mode. Every current browser has supported it for years. Drop your PNG in and download a WebP that looks the same and weighs far less.
- 1Drop your PNG in, click to browse, or paste from the clipboard.
- 2Keep quality high for lossless-looking output, or lower it for maximum savings.
- 3Transparency is preserved automatically — no extra setting needed.
- 4Download your WebP.
How WebP beats PNG at its own job
PNG relies on DEFLATE, a general-purpose lossless algorithm from the early nineties that wasn't designed for images specifically. WebP's lossless mode uses image-aware techniques: it predicts each pixel from its neighbours and stores only the difference, applies colour transforms that decorrelate the channels, and keeps a cache of recently-used colours. All of that is tuned for exactly the patterns images contain. The result is 20 to 30 percent smaller than PNG with pixel-identical output. Switch to lossy mode on photographic content and the gap widens enormously.
Lossy WebP with transparency
This is the combination PNG can't offer at all, and it's the biggest practical win. A product shot on a transparent background, or an illustration with a soft drop shadow, can be stored lossily — dropping the photographic detail nobody perceives — while keeping the alpha channel perfectly crisp. That's how a 2 MB PNG becomes a 150 KB WebP that looks the same on the page. For flat graphics, logos and screenshots, stay lossless: their hard edges are what lossy compression handles worst.
Browser support is a solved problem
Chrome, Firefox, Safari and Edge have all supported WebP for years, on desktop and mobile. It is no longer a format that needs a fallback for the web. The remaining gaps are outside the browser: some older desktop applications, a few upload forms, and certain print workflows still expect PNG or JPG. For anything you're publishing yourself, WebP is safe.
Frequently asked questions
Does WebP keep PNG transparency?
Yes, completely. WebP supports an 8-bit alpha channel, so cut-outs, soft shadows and anti-aliased edges convert cleanly with no fringing or white box.
How much smaller is WebP than PNG?
For photographic content with transparency, commonly 70 to 90 percent smaller. Even in fully lossless mode, expect 20 to 30 percent — WebP's lossless compression is simply better designed for images than PNG's.
Do all browsers support WebP?
Yes. Chrome, Firefox, Safari and Edge have supported it for years across desktop and mobile. It hasn't needed a fallback for web use in a long time.
Will converting PNG to WebP lose quality?
Not in lossless mode — the output is pixel-identical. In lossy mode there is a difference, but at high quality it's invisible on photographs. Use lossless for logos, screenshots and anything containing text.
Is WebP good for SEO?
Indirectly but genuinely. Smaller images load faster, which improves Largest Contentful Paint, which is a Core Web Vitals metric Google uses in ranking. The format itself isn't a ranking factor; the speed it buys you is.
Is my image uploaded?
No. The conversion happens entirely in your browser on your own device.