PNG files are often huge — WebP can shrink them dramatically while keeping the transparency PNG is used for. Drop your PNGs here to convert them on your device, pick a quality, and compare the sizes. Nothing is uploaded, and transparent backgrounds carry straight over.
80% usually cuts size sharply with no visible loss. Changing it re-converts all files.
Converted WebP files will appear here with a size comparison.
How it works
Each PNG is decoded and re-encoded as WebP through the Canvas API. WebP supports transparency like PNG but compresses far more efficiently, so the savings are often large — photographic or richly-colored PNGs frequently drop 60–80%. Transparent pixels are preserved, so logos and icons stay clean on any background.
WebP here uses lossy compression at the quality you choose, which is where most of the size reduction comes from. For flat graphics with few colors the difference from the PNG is invisible; for detailed images, 80% keeps it looking identical at normal sizes. Each file’s before-and-after size makes the saving concrete.
Practical examples
A heavy PNG screenshot for the web
A full-page PNG screenshot weighs several megabytes. Converted to WebP at 80% it can drop to a few hundred kilobytes, loading far faster while looking the same.
Transparent icons for a site
A set of transparent PNG icons is bloating your page. Convert to WebP: transparency is kept and the combined size falls sharply, as the running total shows.
Product images that must stay crisp
For detailed product shots stored as PNG, convert at 90% to balance a big size cut with full sharpness — still much smaller than the original PNG.
Frequently asked questions
Why convert PNG to WebP?
PNG is often unnecessarily large, especially for photos and complex graphics. WebP produces far smaller files while keeping transparency, so pages load faster without giving up the see-through backgrounds PNG is chosen for.
Is transparency preserved?
Yes. WebP supports an alpha channel, and transparent areas of the PNG carry over intact. Unlike converting PNG to JPG, nothing is flattened onto a background.
How much smaller will the WebP be?
For photographic or colorful PNGs, commonly 60–80% smaller; for simple flat graphics the gap is smaller because PNG already handles those well. The per-file readout shows the exact result.
Is this lossy or lossless?
This tool uses lossy WebP, which is where the large savings come from. At 80% quality the difference is invisible for most images. If you need strictly lossless output, keep the PNG — its guarantee is exactness, not size.
Do browsers support WebP with transparency?
Yes — all current browsers render WebP including its transparency. Only very old software might not, in which case keep PNG or use the WebP to PNG tool to go back.
What quality should I pick?
80% is a strong default for a big size cut with no visible loss. Raise to 90% for detailed images you want kept crisp; lower only when size matters most.
Are my images uploaded?
No. Everything runs in your browser with the Canvas API — you can work offline after the page loads, and no image data leaves your device.
Can I convert many PNGs at once?
Yes. Drop or select as many as you like; each converts independently with its own download, and changing the quality re-encodes the whole batch.
Will metadata be kept?
No. Re-encoding through the canvas drops any embedded metadata — usually a privacy benefit when publishing images.
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