Image Compress

We support all major image formats including JPEG, PNG, WebP, and BMP. Each format uses optimized compression algorithms: JPEG uses quality-based compression, PNG uses lossless optimization, WebP provides the best compression ratios with modern browsers. The output format matches your input format, preserving compatibility while maximizing compression efficiency.

Lossy compression (like JPEG) reduces file size by removing some image data, which may slightly reduce quality but achieves significant size reduction. Lossless compression (like PNG optimization) reduces file size without any quality loss by optimizing how data is stored. Our tool automatically applies the best compression method for each format: 1) **JPEG**: Quality-based lossy compression, 2) **PNG**: Lossless optimization, 3) **WebP**: Advanced compression with both lossy and lossless options, 4) **BMP**: Lossless optimization and format conversion recommendations.

Compression ratios depend on image format and content: 1) **JPEG photos**: 50-90% size reduction typically possible, 2) **PNG graphics**: 20-70% reduction through optimization, 3) **WebP conversion**: Up to 80% smaller than equivalent JPEG, 4) **Large resolution images**: Often achieve better compression ratios. Actual results vary based on image complexity, colors, and detail levels. Our tool shows real-time compression preview so you can see exact savings before downloading.

Quality impact depends on compression settings and image format: 1) **High quality (90-100%)**: Minimal visible quality loss, suitable for professional use, 2) **Medium quality (70-90%)**: Good balance for web use, slight quality reduction, 3) **Low quality (10-70%)**: Noticeable quality loss but maximum file size reduction. Our tool provides real-time preview so you can see quality changes instantly. For critical applications, we recommend testing different quality levels to find your optimal balance.

No, absolutely not. All image compression happens locally in your browser using JavaScript and WebAssembly. Here's the complete process: 1) Your image is loaded directly into browser memory, 2) Compression algorithms run entirely on your device's CPU, 3) Results are generated locally without any server communication, 4) No data is transmitted to our servers at any point. This ensures complete privacy protection and works offline. Your original images never leave your device.

This tool processes one image at a time for maximum control and quality assessment. However, you have several options for multiple images: 1) Use our batch processing tool for identical compression settings across multiple images, 2) Use browser tabs to compress multiple images simultaneously, 3) Save your preferred compression settings and quickly apply them to subsequent images, 4) Our batch tool supports up to 50 images with progress tracking and individual quality control.

Optimal quality settings vary by use case: 1) **Web use**: 75-85% for photos, provides good quality with fast loading, 2) **Social media**: 70-80%, balances quality with upload speed and storage, 3) **Email attachments**: 60-75%, reduces email size while maintaining readability, 4) **Mobile apps**: 65-80%, considers mobile data usage and storage, 5) **Print materials**: 90-100%, maintains quality for physical printing, 6) **Archival storage**: 85-95%, balances long-term quality with storage efficiency. Always preview results before downloading.

Visual differences can occur due to: 1) **Compression artifacts**: Lower quality settings may introduce subtle changes in gradients and textures, 2) **Color space changes**: Some formats handle color profiles differently, 3) **Monitor display**: Different devices may display the same image slightly differently, 4) **Browser rendering**: Image display can vary between browsers and devices. To minimize differences: Use quality settings above 80%, ensure your monitor is properly calibrated, compare images at 100% zoom level, and test on multiple devices if critical accuracy is needed.