Convert PNG to WebP (Portable Network Graphics to WebP)
Convert PNG to WebP online. Drop a Portable Network Graphics and get a WebP back at roughly 6% of the original byte cost. No sign-up, nothing saved.
- No account required
- Nothing saved
- Pixel-for-pixel, no resizing
Drag to compare, before / after
Overview
Convert PNG to WebP. This tool re-encodes one Portable Network Graphics into a WebP of the same pixels at roughly 6% of the byte cost, without resizing, cropping, or colour-regrading. The net effect is faster pages, better Core Web Vitals scores, and lower CDN egress bills, because the same visual output travels in a much smaller container. Nothing is saved on our side.
WebP (WebP) is the modern web target. It was standardised in 2010 and reaches roughly 97%% of global browsers in 2026. At equivalent visual quality it cuts byte cost against PNG to about 6% on typical photographic content, which is why hero images on news sites, product galleries, and blog covers increasingly ship as WebP first with a legacy fallback.
PNG (Portable Network Graphics) is the incumbent your source probably came from: camera exports, older CMS uploads, and designer PSDs still save as PNG by default. It is supported everywhere, decodes fast, and is trivial to produce. The cost is size. Nothing in the PNG spec was designed for 2026 bandwidth budgets, and on photographic content a typical PNG file is measurably larger than the same pixels in WebP.
The trade-off is encoding speed and fallback plumbing. WebP takes more CPU to encode than PNG, which is why we run the encoder on our side instead of in your browser. Visual quality at the default target matches PNG on typical photographic content; screenshots and flat-colour illustrations retain their sharp edges. Shipping WebP in production usually pairs with a standard picture element and a PNG fallback for the last few percent of visitors.
When NOT to convert PNG to WebP: archival masters where every original pixel matters (keep the PNG), email-newsletter assets where a desktop client may still refuse WebP (ship JPEG there), and tiny icon-sized assets under 50x50 pixels where the WebP container overhead can exceed the encoded payload. For real hero art, product photography, and blog covers, WebP is the right 2026 default.
Every upload is held only while we re-encode it. The resulting WebP comes back on a one-time download link and is deleted the moment you fetch it, or sooner if you never come back. No account ties the upload to you, and the Privacy page lists every byte that touches disk. Converting PNG to WebP on BouseMutton leaves no residue behind.
WebP at a glance, against PNG
The numbers and trade-offs you need before you commit.
WebP vs PNG byte cost
On typical photographic content, WebP reaches PNG-equivalent visual quality at roughly 6% of the bytes. Flat illustrations compress even better.
WebP browser support
WebP covers roughly 97%% of global browser traffic in 2026. Pair with a PNG fallback in a picture element for the remaining tail.
Codec era
WebP was standardised in 2010; PNG dates from earlier. The generation gap is why WebP fits the same image in much less space.
Encoding cost
WebP encoding is more CPU-heavy than PNG, which is why we run it on our side. Decoding in the browser is fast and not perceptibly slower than PNG.
No resizing
Conversion is pixel-for-pixel. A PNG that was 2048 pixels wide comes back as a WebP that is 2048 pixels wide. No silent dimension change.
Transparency preserved
WebP supports an alpha channel, so PNG files with transparent regions convert without losing transparency. Edges stay clean.
When to keep PNG
Keep the PNG for archival masters, for email-only delivery, and for icons under 50x50 pixels where the WebP container overhead outweighs its codec win.
How it works
Three steps, usually done inside five seconds.
- 1
Upload a PNG
Drop a PNG up to 25 MB, or paste from the clipboard. No sign-up, no credit card, no account link.
- 2
We re-encode it as WebP
We run the WebP encoder on our side at a default quality that matches PNG visual quality for typical photographic content. Your battery stays cool.
- 3
Download your WebP
Your WebP comes back on a one-time download link. Fetch it and the file is deleted. Never come back and the file is deleted anyway.
See it in action
Drag each slider to pixel-peep the before and after.
Your image, gone when you're done
Every upload is held only while we re-encode it. The resulting WebP comes back on a one-time download link and is deleted the moment you fetch it, or sooner if you never come back. No account ties the upload to you, and the Privacy page lists every byte that touches disk. Converting PNG to WebP on BouseMutton leaves no residue behind.
- Processed in seconds
- Nothing saved
- No account linked
Upload an image
One click. No signup. We'll do the rest.
Convert image format
Need to process more than one image?
The free Convert PNG to WebP (Portable Network Graphics to WebP) runs one image at a time. A credit pack unlocks up to 50 images per batch, a single ZIP download, and three named presets (Blog / Social / Ecom). From €5 for 100 credits. Pay once, never expire.
Glossary for PNG and WebP
Plain-English definitions for the jargon above.
Frequently asked questions
Answers to the things most people ask before trying a new tool.
Related tools
One-click jumps to other jobs this image probably needs.
Compress image
Shrink an already-converted image further without changing its format, for bandwidth-constrained pages.
Strip EXIF metadata
Remove camera, GPS, and device metadata before publishing the converted image publicly.
Pad to a target aspect ratio
Extend the canvas to a 1:1 or 9:16 frame without losing pixels, before or after the format conversion.
Related reading on PNG, WebP, and image optimisation
Other tools that pair well with this one.
- Browse all format convertersSee the full set of PNG and WebP tools on BouseMutton, including compression, EXIF stripping, and resize.
- Portable Network Graphics -> JPEGAlso converting Portable Network Graphics to JPEG? This tool handles the same source in a different target format, for cases where the codec choice differs.
- JPEG -> WebPRun JPEG through this tool before or after conversion to WebP, depending on the workflow step you are at.
- Compress imageShrink an already-converted image further without changing its format, for bandwidth-constrained pages.
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