Convert PNG to WebP
If a site audit keeps flagging heavy PNG images, WebP is usually the fix: it delivers the same visuals at a fraction of the weight and still supports transparency. Drop a PNG here and get a WebP back without installing anything — the encoding happens inside your own browser.
Content last reviewed 2026-07-14.
Preconfigured for PNG input — other formats work too.
Converting to WebP: Modern web format that beats JPEG and PNG on size, with transparency support.
or drag & drop images here, or paste from your clipboard
PNG, JPG, WebP, AVIF, GIF, BMP, TIFF, HEIC, SVG
Your images are processed on your device and are not uploaded to PNGful.
How it works
- 1
Add PNG files
Drop, pick or paste — batch conversion is supported.
- 2
Conversion runs locally
Each file is decoded and re-encoded as WebP in your browser — nothing is uploaded.
- 3
Adjust if needed
Use the quality slider to trade size against detail.
- 4
Download
Single files or everything as a ZIP.
Why convert PNG to WebP?
- Dramatically smaller files for web use, which translates directly into faster page loads.
- Transparency is preserved — WebP has full alpha support, so logos and UI graphics stay clean.
- Every current major browser displays WebP, so there's no compatibility penalty for modern audiences.
- A quality setting lets you choose your own balance between file size and fidelity.
- Runs locally: your images are never uploaded, and there's nothing to sign up for.
Good to know
- WebP encoding here is lossy with an adjustable quality setting; higher quality means larger files but fewer visible artifacts.
- Alpha transparency carries over from the PNG without change.
- Photographic PNGs shrink the most — reductions of well over half are common. Flat-color graphics shrink too, though less dramatically.
- Very old software and browsers (such as Internet Explorer or Safari before version 14) cannot display WebP, so keep the PNG if you must support them.
- Keep your PNG as the master copy: once detail is removed by lossy WebP encoding, it can't be recovered.
Your images stay private
Your images are processed on your device and are not uploaded to PNGful.All processing happens locally using your browser's own image engine — there is no upload step, no server-side queue, and nothing to delete afterwards. Read more in our privacy policy.
Frequently asked questions
How much smaller will my image get?
It depends on the content. Photographic images stored as PNG often shrink by 70 percent or more, since PNG is a poor fit for photos to begin with. Screenshots and flat graphics see smaller but still meaningful reductions. The size shown after conversion tells you exactly what you gained.
Does WebP keep my transparent background?
Yes. WebP supports full alpha transparency just like PNG, so transparent and semi-transparent pixels are preserved. This makes it a genuine PNG replacement for logos and interface graphics on the web.
Is the conversion lossless?
The WebP produced here uses lossy encoding with a quality control, which is what gives the large size savings. At high quality settings the difference from the original is very hard to see, but it isn't pixel-identical — keep the PNG if you need a perfect master.
Which browsers can display WebP?
All current versions of Chrome, Firefox, Safari, and Edge display WebP natively, and have for years. The stragglers are legacy environments like Internet Explorer and Safari 13 or earlier. For a general audience in 2026, WebP is safe to serve.
Are my images uploaded during conversion?
No. The PNG is read and the WebP is encoded entirely within your browser using your device's own processor. Nothing is transmitted to a server at any point.
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