Convert PNG to WebP
Convert a PNG to WebP in your browser. WebP keeps transparency just like PNG, but with much smaller files — typically 50-80% smaller for graphics and screenshots. Great for websites, faster uploads, and storage limits.
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Stays on your device
Your image is read into your browser tab, converted with canvas, and handed to your downloads folder. No upload, no server, no log. The file never touches our infrastructure.
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Phone photos work correctly
iPhone and Android JPGs encode rotation in EXIF metadata; we read it and bake the rotation into the converted file so the output looks the right way up. No more sideways photos.
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PNG → WebP specifics
WebP supports transparency (so PNG's alpha channel survives the conversion). It uses modern compression and is broadly supported in every major browser since 2020.
How it works
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Drop your PNG
Drag the file onto the box above, or click to browse. We read it locally — no upload.
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Pick a quality (or stick with 90%)
WebP is a lossy format with a quality knob. 90% looks indistinguishable from the original on screen and is a great default; drop lower for smaller files if you need to.
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Click and save
The converted file lands in your downloads folder with the right extension and a clean, sanitized filename.
Frequently asked questions
Does my image ever leave my device?
No. The conversion runs entirely in your browser using HTML canvas. There's no upload, no server, no log. Open DevTools while it runs and watch the Network tab — you'll see zero traffic carrying your image.
Is there a file size limit?
No limit set by us. The real ceiling is your device's memory and the browser's canvas size limits. Phones can typically handle photos up to about 50 megapixels; desktops can go bigger. Very large images may take a few seconds to encode.
Will the file be smaller after conversion?
It depends on the source and target. Generally: PNG → JPG and PNG → WebP produce much smaller files. JPG → WebP is also smaller. JPG → PNG and WebP → PNG produce larger files (PNG is lossless and tends to be bigger). The result panel shows you the exact before/after sizes.
Does this work on mobile?
Yes. Tap the drop zone to open the photo picker; tap save when done. On phones, the result lands in your Photos or Files app depending on your OS.
What about my original file?
Untouched. The converted file is a separate copy delivered as a download. Your original on disk stays exactly as it was.
Will the transparency in my PNG survive?
Yes. WebP supports an alpha channel just like PNG does. Transparent and semi-transparent pixels in your PNG will be preserved exactly in the WebP.
Why is the WebP so much smaller?
WebP uses more modern compression algorithms than PNG. PNG's compression dates from the 1990s and is general-purpose lossless; WebP is purpose-built for images and compresses them dramatically better, while keeping perceptual quality high. The difference is especially big on photographs and complex graphics.
Does anything not support WebP?
Very little, anymore. Every major browser has supported WebP since around 2020 (Chrome, Firefox, Safari, Edge), and most image viewers handle it. The handful of older tools or platforms that don't can use our WebP to PNG or WebP to JPG converters to go back.