Image Compressor

Our free online Image Compressor lets you reduce the file size of your PNG, JPG, and WebP images directly in your browser. No files are ever uploaded to a server -- all processing happens locally on your device, ensuring complete privacy.

How It Works

The compressor uses the HTML5 Canvas API to re-encode your images at a lower quality setting. When you adjust the quality slider, the tool redraws the image on a canvas element and exports it using the canvas.toBlob() method with the specified quality parameter. This is the same technique used by professional image optimization pipelines.

Tips for Best Results

• For photographs (JPG), quality between 60-80% typically provides significant savings with minimal visible quality loss.
• PNG compression through canvas re-encoding may sometimes increase file size because PNG is a lossless format. For PNG files, consider converting to JPG or WebP for better compression.
• WebP images generally achieve the best compression ratios while maintaining high visual quality.
• Use the before/after preview to visually compare results and find the right quality balance.

Why Compress Images?

• Faster Page Loads: Smaller images mean faster website loading times and better user experience.
• Reduced Bandwidth: Save on hosting costs and data usage by serving optimized images.
• Better SEO: Google and other search engines favor fast-loading pages with optimized images.
• Email Attachments: Compressed images fit within email attachment size limits.
• Social Media: Smaller files upload faster to social platforms while maintaining visual quality.

Supported Formats

This tool supports the three most common web image formats: JPEG/JPG (best for photographs and complex images), PNG (best for graphics, logos, and images with transparency), and WebP (modern format with superior compression). All compression happens client-side in your browser using standard Web APIs.

Batch Compression

Need to compress multiple images at once? Simply select or drag-and-drop multiple files. The tool will process each image individually, showing you the compression results for every file. You can download them all at once or pick specific files to save.