JPG to WebP Converter
Convert JPG/JPEG images to WebP format for better web performance (25-35% smaller files). Choose between lossy compression (recommended, quality 85) or lossless mode. Upload up to 100 files (max 100 MB each).
Drop JPG/JPEG images here or click to browse
Maximum 100 files • 100 MB per file • 0/100 uploaded
About JPG to WebP Conversion
This tool converts JPG/JPEG images to WebP format using WebAssembly (jSquash library with MozJPEG decoder and libwebp encoder). WebP provides 25-35% smaller files than JPG while maintaining excellent quality. Perfect for web optimization with both lossless and lossy compression.
Features:
- • Upload up to 100 JPG/JPEG images at once
- • Maximum 100 MB per file
- • Lossy mode (recommended): Quality 85 for excellent visual results
- • Lossless mode: Perfect quality preservation
- • Advanced WebP encoding options (method, filters, target size)
- • Real-time size estimation
- • Thumbnail preview for each image
- • Individual or batch download (ZIP)
- • Real-time conversion statistics
WebP Advantages:
- • 25-35% smaller than JPG in lossy mode (same quality)
- • 10-20% smaller than JPG in lossless mode
- • Supported by all modern browsers (Chrome, Firefox, Safari, Edge)
- • Better compression algorithms than JPG
- • Faster page loading for web images
- • Better for web performance and SEO
- • Optional transparency support (alpha channel)
Compression Modes:
- • Lossy (recommended): 25-35% smaller than JPG with minimal quality loss
- • Quality 75-85: Best balance for photos (default 85)
- • Quality 85-95: High quality for professional images
- • Lossless: Perfect quality, but can't recover JPG losses
- • Note: JPG is already lossy, so lossless WebP won't restore lost details
Advanced Options Explained:
- • Encoding Method (0-6): Speed vs quality trade-off (default 4)
- • Compression Effort (0-6): Lossless mode compression strength
- • Auto Filter: Automatically optimize filtering (recommended)
- • Sharp YUV: Better for text and graphics (optional)
- • Target Size: Specify desired file size (encoder adjusts quality)
When to Use WebP:
- • Web images for faster page loading
- • Responsive design images
- • E-commerce product photos
- • Blog post images and thumbnails
- • Social media images
- • Mobile app assets
- • Any web-facing images requiring optimization
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
Recommended Settings:
- • Photos: Lossy mode, quality 85 (excellent visual quality)
- • Professional images: Lossy mode, quality 90-95
- • Screenshots/graphics: Lossless mode with Sharp YUV
- • Web optimization: Lossy mode, quality 75-85
- • Target size: Use when file size limit is critical
Technical Details:
- • Uses jSquash library (WebAssembly compiled MozJPEG + libwebp)
- • WASM modules cached after first load (~300-500KB)
- • High-quality JPEG decoder from MozJPEG
- • Advanced WebP encoding with libwebp
- • 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.
Note about JPG compression: JPG is already a lossy format, meaning some image quality has been permanently lost during JPG compression. Using lossless WebP will preserve the current JPG quality but cannot recover the original lost details. For best results with JPG sources, use lossy WebP at quality 85.