Image Compressor

Tool Description:
This free online Image Compressor reduces file sizes while maintaining visual quality, perfect for optimizing web graphics and mobile content. Supporting JPG/PNG formats, it features real-time side-by-side comparisons of original vs compressed images with file size metrics. The intuitive interface offers quality adjustment (1-100%) via slider control, instant previews, and one-click downloads. All processing occurs client-side using advanced compression algorithms – no server uploads ensure complete privacy. Ideal for bloggers, webmasters, and social media users needing faster-loading images without quality loss. Mobile-responsive design works seamlessly across devices, providing professional compression results instantly with zero watermarks or registration requirements.

How to Use:

1. Drag/drop or select an image
2. Adjust quality slider (80% recommended)
3. Click “Compress Image”
4. Compare original/compressed versions
5. Download optimized file
   Process completes in seconds with instant visual feedback and file size savings displayed.

Working Method:
The tool uses compressor.js library for client-side processing:

1. Upload Handling: Images read locally via FileReader API
2. Compression Engine:
   1. JPG: Adjusts quantization tables based on quality %
   1. PNG: Optimizes color depth and metadata
3. Quality Control: Slider adjusts lossy compression ratio (1-100%)
4. Visual Comparison: Canvas renders original/compressed versions side-by-side
5. Size Calculation: Real-time file size comparison in KB/MB
6. Output Generation: Creates download-ready Blob with optimized compression
   Entire workflow occurs in-browser using HTML5 Canvas and Web Workers, preserving EXIF data while removing unnecessary metadata. No image data leaves the user’s device during compression.