PNG to WebP converter
Convert PNG to WebP for much smaller files with transparency — locally, no upload.
Convert PNG to WebP in your browser
WebP delivers the same visual quality as PNG at a much smaller file size, with full support for transparency — which makes it the modern choice for the web. Converting PNG to WebP is one of the easiest ways to speed up a site or shrink a media library without losing quality or the alpha channel.
The conversion runs entirely in your browser using its built-in WebP encoder, so nothing is uploaded. You control the quality and can see the estimated output size before downloading — useful when you are aiming for a specific page-weight budget.
WebP keeps PNG transparency intact, so logos and graphics stay clean on any background. Every current browser supports WebP, so it is safe to use today; keep the original PNG only if you must deliver to very old software that predates WebP.
Privacy by design
All processing happens inside your browser. Your files never reach a server — there is nothing to store, transmit or share.
Learn more in our privacy policyBatch & bulk: process multiple images at once
Load not just one image but as many as you like — by drag & drop or multiple-select. imagenimble processes them one after another, locally in your browser, and packages the results as a single ZIP download. No upload, no account and no fixed limit — only your device’s memory caps very large batches. It is the quick way to convert or edit a whole folder in one go.
Frequently asked questions
For most PNGs, WebP is 25–50% smaller at the same visual quality — often much more for photographic content.
Yes — WebP supports a full alpha channel, so transparent PNG areas stay transparent.
Yes — Chrome, Firefox, Safari and Edge have supported WebP for years, so it is safe for websites and apps.
No — encoding happens entirely in your browser and works offline after the page loads.