PNG to WebP Converter - Free Online Tool

A PNG to WebP converter transforms PNG images into WebP, Google's modern image format. WebP offers significantly smaller file sizes than PNG while supporting both lossy and lossless compression, plus full transparency support. This makes WebP ideal for websites that need fast loading without sacrificing image quality or transparency. The tool processes images entirely in your browser.

1. Upload your PNG file: Drag and drop or click to select a PNG image from your device. Files up to 10MB are supported.
2. Adjust quality settings: Use the quality slider to balance file size and image clarity. For lossless conversion, use the highest quality setting.
3. Download your WebP: Click the download button to save the converted image instantly to your device.

• Much smaller files: WebP images are typically 26% smaller than PNG while maintaining the same quality.
• Transparency preserved: Unlike JPG, WebP supports alpha channels, keeping your transparent backgrounds intact.
• Better web performance: Smaller files mean faster page loads and better Core Web Vitals scores.

Use case 1: Optimize website graphics

Convert logos, icons, and graphics with transparency to WebP for faster loading websites without losing the transparent backgrounds.

Use case 2: Reduce app bundle sizes

Mobile and web apps using PNG assets can significantly reduce download sizes by converting to WebP.

Use case 3: Improve page speed scores

Google PageSpeed Insights specifically recommends WebP. Converting PNG images is one of the easiest wins for better scores.

• Compression: PNG is lossless; WebP supports both lossy and lossless.
• File size: WebP is typically 26%+ smaller than PNG.
• Transparency: Both formats support transparent backgrounds.
• Animation: PNG doesn't support it; WebP does.
• Browser support: PNG works everywhere; WebP works in all modern browsers.

WebP not opening on older system

Windows 10 (pre-2018) and macOS before Big Sur may not display WebP natively. The file is valid; update your system or use a modern browser.

File size larger than expected

For very small or simple PNGs, WebP savings may be minimal. The biggest improvements come from larger, complex images.

Quality looks different

WebP uses different compression algorithms. If the result looks different, try increasing quality to 90–100 for more faithful conversion.

• Use quality 80–90 for lossy compression with excellent visual quality.
• For pixel-perfect conversion, use lossless mode (quality 100).
• WebP transparency often compresses better than PNG—great for logos with complex edges.
• Serve WebP with PNG fallback using the <picture> element for legacy browser support.

• Convert to JPG (no transparency) with PNG to JPG.
• Reverse conversion with WebP to PNG.
• Convert photos with JPG to WebP.
• Convert Apple photos with HEIC to WebP.

All image processing happens entirely in your browser using client-side JavaScript. Your photos are never uploaded to any server, stored, or transmitted. Close the tab and your data is gone.