Convert PNG to WebP
WebP keeps PNG's transparency support but with 60-80% smaller file sizes. Modern, fast, fully browser-side.
Drop a photo to start
JPG, PNG, WebP, HEIC up to 40 MB · stays in your browser
Never uploaded · 100% browser-side
How it works
- 1
Drop your PNG file
Drag & drop or browse to upload. PNG up to 40 MB.
- 2
We re-encode it as WebP
Quality defaults to 92% to preserve sharp edges. Transparent regions stay transparent in the WebP output.
- 3
Download the converted file
Compare original vs converted file size before saving. Open in the AI editor for further edits without re-uploading.
Why use this online tool
60-80% smaller files
WebP crushes PNG for photos and even sharp graphics. A 3 MB PNG often becomes 600-900 KB as WebP.
Transparency preserved
Unlike JPG, WebP supports alpha channels - your transparent backgrounds stay transparent.
Browser-side, private
Conversion runs locally. No upload, no server, no privacy risk.
Free, no watermark
Unlimited conversions, no signup, no overlay on the output.
When to use it
- Logos and graphics for websites - keep the transparent background, lose 70% of the file size
- PNG screenshots that are too heavy to attach or upload
- App icons and UI assets in web projects with PWA / Lighthouse score targets
- Transparent product photos for e-commerce sites where load speed matters
- Bulk asset conversion when migrating older PNG-only image libraries
Frequently asked questions
- Does this upload my photo to a server?
- No. The conversion runs entirely in your browser using the Canvas API. Your image data never leaves your device, so the tool works offline once the page is loaded and there's no privacy risk.
- Does WebP keep PNG's transparency?
- Yes. WebP supports an alpha channel just like PNG, so transparent regions stay transparent. This is the main reason to choose WebP over JPG when converting from PNG.
- Why is the WebP so much smaller than the PNG?
- PNG is lossless - it stores every pixel exactly. WebP can be lossy (smarter compression) or lossless (still smaller than PNG due to better compression algorithms). At 92% quality, the visual difference is imperceptible while the file size drops dramatically.
- Will the WebP work as a PNG replacement everywhere?
- On modern browsers (2020+), email clients, and design tools - yes. For legacy systems or older Adobe versions, you may need to keep a PNG fallback. As of 2026, WebP is supported in essentially every consumer-facing platform.
- Should I use lossless WebP instead?
- Lossless WebP is ~25% smaller than PNG; lossy WebP at 92% is ~70% smaller. For UI assets where pixel-perfect precision matters, choose lossless. For photos and most graphics, lossy WebP at 92% is visually identical with much better savings.
- Can I batch-convert multiple files?
- Right now this tool processes one file at a time. Bulk conversion is on our roadmap. For multiple files, repeat the convert-and-download flow.
Related free tools
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