PNG to WebP Converter
Upload a PNG, watch the file size drop, and download the WebP.
A free online PNG to WebP converter — drop in a PNG, adjust the quality, and see a live before/after file size comparison as you tune it. Transparency is preserved. No signup, everything runs in your browser.
Why convert a PNG to WebP?
WebP is a modern image format that typically compresses images significantly smaller than PNG — often 25-50% smaller for the same visual quality — while still supporting a full alpha transparency channel, which JPEG can't do. Smaller image files mean faster page loads, which is why WebP is now the default format most browsers and CDNs prefer serving. Converting your PNGs to WebP is one of the highest-leverage, lowest-effort ways to speed up a website's images.
Choosing a quality setting
WebP uses lossy compression, so there's a direct trade-off between file size and visual fidelity. The tool shows the resulting file size live as you move the Quality slider — for photos and complex images, 75-85% quality is usually visually indistinguishable from the original while cutting the file size substantially. For simple graphics with flat colors, you can often go lower without noticing any difference.
Transparency is preserved
Unlike converting to JPEG, converting a PNG with a transparent background to WebP keeps that transparency intact — WebP supports a full alpha channel the same way PNG does. This makes it a safe drop-in replacement for PNG in almost every case where you'd otherwise need transparency.
Browser support
WebP is supported natively by every major browser released in the last several years — Chrome, Firefox, Edge, and Safari 14+. If you need to support very old browsers, keep a PNG fallback using the <picture> element with a WebP <source> and a PNG fallback <img>.
Frequently asked questions
How do I convert a PNG to WebP?
Upload or drag in a PNG. The tool encodes it as WebP immediately and shows the original and new file sizes side by side — adjust the Quality slider to trade off file size against visual quality, then click Download WebP.
Why convert PNG to WebP?
WebP typically produces noticeably smaller files than PNG for the same image — often 25-50% smaller — while still supporting transparency, which JPEG doesn't. Smaller images mean faster page loads, which is why most modern browsers and CDNs prefer serving WebP.
What does the Quality slider control?
WebP supports lossy compression, so Quality trades file size against visual fidelity — lower values produce smaller files with more compression artifacts, higher values stay closer to the original. Watch the live file size comparison to find the smallest size that still looks right for your use case.
Does WebP keep transparency?
Yes. WebP supports an alpha channel just like PNG, so any transparent areas in your source image stay transparent in the WebP output.
Is my image uploaded anywhere?
No. The conversion happens locally in your browser using a canvas — your PNG never leaves your device, and nothing is stored on a server.
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