JPG to PNG Converter
Convert JPG/JPEG images to PNG format using native Canvas API for fast, zero-dependency conversion. Optional Oxipng optimization for 10-30% smaller files (lossless). Upload up to 100 files (max 100 MB each).
Drop JPG images here or click to browse
Maximum 100 files • 100 MB per file • 0/100 uploaded
About JPG to PNG Conversion
This tool converts JPG/JPEG images to PNG format using the native Canvas API for fast, zero-dependency conversion. Optionally use Oxipng optimization to reduce PNG file size by 10-30% with lossless compression. All processing happens locally in your browser for maximum privacy and security.
Features:
- • Upload up to 100 JPG images at once
- • Maximum 100 MB per file
- • Native Canvas API for instant conversion
- • Zero dependencies for basic conversion
- • Optional Oxipng optimization (10-30% smaller, lossless)
- • Adjustable optimization level (0-6)
- • Thumbnail preview for each image
- • Individual or batch download (ZIP)
- • Real-time conversion statistics
Conversion Process:
- • Step 1: JPG loaded into Canvas element
- • Step 2: Canvas converts to PNG using native API (instant)
- • Step 3: Optional Oxipng optimization (if enabled)
- • Fast conversion using browser's built-in capabilities
- • No quality loss during conversion
- • Preserves image dimensions and color information
Oxipng Optimization Levels:
- • Level 0-1: Fastest, minimal optimization (5-10% smaller)
- • Level 2-3: Balanced, recommended for most use cases (10-20% smaller)
- • Level 4-5: Slower but better compression (15-25% smaller)
- • Level 6: Maximum compression, slowest (20-30% smaller)
- • All optimization is lossless - no quality reduction
- • Higher levels take more time but produce smaller files
Important Notes:
- • File Size: PNG files are typically larger than JPG (lossless vs lossy)
- • Transparency: PNG supports transparency, JPG does not
- • Use Case: Convert to PNG when you need lossless quality or transparency
- • Performance: Basic conversion is instant, Oxipng adds processing time
- • Quality: PNG preserves all image data without compression artifacts
When to Convert JPG to PNG:
- • Need to preserve exact image quality (lossless)
- • Planning to edit the image further (avoid JPG re-compression)
- • Need transparency support for compositing
- • Creating graphics or screenshots
- • Archiving images where quality is critical
- • Working with text or sharp edges (PNG handles better)
Technical Details:
- • Uses native HTML5 Canvas API for conversion (no dependencies)
- • Optional Oxipng via WebAssembly (jSquash library)
- • Oxipng only loaded if optimization is enabled
- • All processing happens client-side (no server upload)
- • Works in all modern browsers with Canvas support
Privacy: All image conversion happens in your browser using the Canvas API. Your images are never uploaded to any server. Oxipng (if enabled) is loaded on-demand and cached. Everything is processed locally for maximum security and privacy.