Convert PNG to WebP in your browser
Free PNG to WebP converter. Shrink PNG files for the web while keeping transparency. Batch-convert, no upload, no signup. Output is pre-set to WebP.
How to use the PNG to WebP converter
- 1
Drop your PNG files
Drag and drop one or more .png images into the box, or click to pick them.
- 2
Output is set to WebP
WebP is pre-selected. Lower the quality slider for smaller files; 85 is a safe default for photos, push higher for graphics with sharp edges.
- 3
Convert and download
Each PNG is re-encoded as WebP in your browser. Download instantly — nothing is uploaded.
Why convert PNG to WebP
PNG is great — lossless, supports transparency, opens everywhere. The downside is file size. A high-resolution screenshot or a Photoshop export at full quality often lands at several megabytes. That is fine for archival, but it is too heavy for a website, an email attachment, or a CMS upload.
WebP is the modern web's answer. It compresses PNG-class content (transparency intact, sharp edges intact) at 25–35% smaller losslessly, and 50–80% smaller with lossy compression that you can barely see. Every browser released in the last few years renders WebP natively. For anything that ships to a website or gets uploaded through a web form, WebP is almost always the right output format.
Everything runs locally: the PNG is decoded in your browser, re-encoded as WebP on your own device, and never uploaded. If you need to go the other direction, our WebP to PNG converter handles it. For other formats, the image format converter covers every pair.
Your files never leave your browser.
All processing runs locally on your device. No uploads, no tracking of file content.
FAQ
How do I convert PNG to WebP?
Drop your PNG file into the box above. WebP is already selected as the output, so just click convert and download. Drop several PNG files to convert them all at once.
How much smaller will the WebP be?
Usually 25–80% smaller than the source PNG, depending on the image and quality setting. Photos and complex images shrink the most (up to 80% at quality 75–85). Simple graphics, screenshots, and images with large solid color areas shrink less but still meaningfully (25–40%). The savings are why WebP exists.
Will the converted WebP keep transparency?
Yes. WebP supports a full alpha channel just like PNG, so transparent areas in your PNG stay transparent in the WebP. This is the main reason to choose WebP over JPG when shrinking a PNG — JPG would flatten transparency to white.
Does WebP support every browser?
All modern browsers — Chrome, Firefox, Safari (14+), Edge, Opera, and every mobile browser — render WebP natively. Safari only added support in late 2020, so if you need to support very old iOS or macOS versions, keep a PNG fallback. For everything else, WebP just works.
Will I lose quality converting PNG to WebP?
By default the converter uses lossy WebP at quality 85, which produces a small file with visually invisible quality loss on photos. For graphics, screenshots, and images with sharp text, push the quality slider to 95 or higher to keep edges crisp. PNG is lossless and WebP can also be lossless, but most online use cases don't need it — lossy WebP at 85 is what production websites ship.
When should I NOT convert PNG to WebP?
Two cases. First, if the PNG is an asset for print, document templates, or anywhere a non-web app will open it — many desktop apps still don't accept WebP, so stay PNG. Second, if you need to keep editing the image across many save cycles — re-encoding lossy WebP repeatedly accumulates compression artifacts. Keep your master file as PNG and only export to WebP at the end.
Are my PNG files uploaded anywhere?
No. The conversion runs entirely in your browser using the Canvas API. Your images never leave your device — check the Network tab if you want to confirm.
Can I convert multiple PNG files to WebP at once?
Yes. Drop as many PNG files as you want in one go. Each is converted and downloaded separately.
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Last updated: 2026-05-23