PNG to WebP Converter
Convert PNG images to WebP format for better web performance (25-35% smaller files). Perfect transparency support with lossless or lossy compression. Upload up to 100 files (max 100 MB each).
Drop PNG images here or click to browse
Maximum 100 files • 100 MB per file • 0/100 uploaded
About PNG to WebP Conversion
This tool converts PNG images to WebP format using WebAssembly (jSquash library with libwebp). WebP provides 25-35% smaller files than PNG while maintaining excellent quality. Perfect support for transparency with both lossless and lossy compression.
Features:
- • Upload up to 100 PNG images at once
- • Maximum 100 MB per file
- • Perfect transparency support (preserves PNG alpha channel)
- • Lossless mode: 25-35% smaller than PNG, same quality
- • Lossy mode: 50-80% smaller than PNG, minimal quality loss
- • Automatic transparency detection
- • Advanced WebP encoding options
- • Thumbnail preview for each image
- • Individual or batch download (ZIP)
- • Real-time conversion statistics
WebP Advantages:
- • 25-35% smaller than PNG in lossless mode
- • 50-80% smaller than PNG in lossy mode
- • Full support for transparency (alpha channel)
- • Supported by all modern browsers (Chrome, Firefox, Safari, Edge)
- • Better compression algorithms than PNG
- • Faster page loading for web images
- • Better for web performance and SEO
Compression Modes:
- • Lossless: Perfect quality preservation, 25-35% smaller than PNG
- • Lossy: Excellent quality with minimal loss, 50-80% smaller than PNG
- • Both modes fully support transparency
- • Lossless recommended for images with transparency
- • Lossy recommended for photos and web optimization
Transparency Support:
- • WebP fully supports PNG-style transparency
- • Alpha channel preserved in both lossless and lossy modes
- • Adjustable alpha quality for fine control
- • Automatic detection of transparent pixels
- • Optional background color replacement
Advanced Options Explained:
- • Compression Effort (0-6): Higher = smaller file but slower
- • Alpha Quality (0-100): Quality of transparency channel
- • Encoding Method (0-6): Speed vs quality trade-off
- • Auto Filter: Automatically optimize filtering
- • Sharp YUV: Better for text and graphics
When to Use WebP:
- • Web images for faster page loading
- • Responsive design images
- • E-commerce product photos
- • Blog post images and thumbnails
- • Any web-facing images needing transparency
- • Mobile app assets
Browser Support:
- • Chrome 23+ (2012)
- • Firefox 65+ (2019)
- • Safari 14+ (2020)
- • Edge 18+ (2018)
- • Mobile: iOS 14+, Android 4.0+
- • Over 97% of global browsers support WebP
Technical Details:
- • Uses jSquash library (WebAssembly compiled libwebp)
- • WASM modules cached after first load (~300-500KB)
- • High-quality PNG decoder from Rust PNG crate
- • Optional image resizing with high-quality algorithms
- • All processing happens client-side (no server upload)
Privacy: All image conversion happens in your browser using WebAssembly. Your images are never uploaded to any server. WASM modules are downloaded once and cached. Everything is processed locally for maximum security and privacy.