Browser Tool — No Upload
PNG → WebP Converter
Convert PNG images to modern WebP format or JPEG directly in your browser. WebP delivers 25–35% smaller files than PNG at equivalent visual quality — making it the preferred format for web performance and Core Web Vitals.
Why WebP?
- 25–35% smaller than equivalent PNG
- Supported by all modern browsers
- Improves Google PageSpeed score
- Supports transparency (alpha channel)
Preview
Upload a PNG to preview the conversion.
How to Convert PNG to WebP
Privacy-first · Zero uploadWebP is a modern image format developed by Google that provides superior compression compared to both PNG and JPEG. Converting your PNG files to WebP is one of the quickest wins for improving your website's speed, particularly for images in blog posts, product pages, and hero sections.
Quarkova's converter uses the browser's native Canvas API to decode your PNG and re-encode it as WebP at your chosen quality level. This means the entire conversion happens on your device — zero server involvement, zero upload delays, and zero risk of your images being stored anywhere.
The quality slider from 70–90% is where WebP truly shines. At 80%, WebP images are typically 30–40% smaller than PNG while appearing visually identical in any modern browser. The JPEG output option is available for wider compatibility with older software.
🌐 Universal Support
WebP is supported in Chrome, Safari, Firefox, Edge, and all major mobile browsers.
📦 Smaller Files
WebP reduces bandwidth costs and improves Google Lighthouse performance scores.
🔑 No API Key
No account, no API, no cloud. Your files stay entirely in your browser.
Frequently Asked Questions
Can I convert large PNG files? ▾
Yes. There is no server-imposed size limit. Large files are only constrained by your browser's memory. Modern browsers handle PNGs up to 50MB with ease.
Does WebP support transparency like PNG? ▾
Yes. WebP fully supports the alpha channel (transparency). If your PNG has a transparent background, the WebP output will preserve it. Note: JPEG does not support transparency.
Is the conversion lossless or lossy? ▾
The WebP and JPEG output here uses lossy compression (controlled by the quality slider). For visually lossless results, set quality to 95–100%.
Does this work on iPhone / iOS? ▾
Yes. Safari on iOS 16+ supports WebP encoding via the Canvas API. The tool works on Safari, Chrome for iOS, and Firefox for Android.
Why convert to WebP instead of JPEG? ▾
WebP provides better compression efficiency than JPEG at the same visual quality. For web usage, WebP is the recommended format per Google's Web Performance guidelines.