Free Bulk Image Resizer & Compressor Tool - Resize Multiple Images Online

To resize multiple images in bulk using our tool:

1. Upload Images: Drag and drop your images into the upload area or click to browse files. You can select multiple images at once.
2. Choose Resize Mode: Select from percentage scaling, fixed width, fixed height, or both width and height.
3. Set Dimensions: Enter your desired dimensions and quality settings (1-100).
4. Process: Click "Process Images" to resize all images simultaneously.
5. Download: Download all processed images as a ZIP file or individually.

Our tool supports JPEG, PNG, and WebP formats and processes everything client-side for maximum privacy and speed.

Our bulk image resizer supports the following formats:

• JPEG (.jpg, .jpeg): Best for photographs and images with many colors
• PNG (.png): Ideal for images with transparency or sharp edges
• WebP (.webp): Modern format offering superior compression

The tool automatically detects the input format and maintains it during processing. You can also convert between formats by adjusting the output settings. All formats support our compression and resizing features.

Our image compression uses advanced lossy and lossless algorithms:

• Quality Control: Adjustable quality from 1-100, where 85 provides optimal balance
• Smart Compression: Automatically optimizes based on image content
• Real-time Preview: Shows compression results before download
• Size Reduction: Typically achieves 30-70% file size reduction

The algorithm analyzes each image's characteristics and applies appropriate compression techniques while preserving visual quality. Higher quality settings maintain more detail but result in larger files.

Yes, your privacy is our top priority:

• Client-Side Processing: All image processing happens in your browser
• No Server Upload: Images never leave your device
• Memory Only: Processed images are stored temporarily in browser memory
• Auto-Clear: All data is automatically cleared when you close the page
• No Tracking: We don't store or analyze your images

This approach ensures complete privacy while providing fast processing speeds since there's no network transfer required.

Resizing and compression serve different purposes:

Our tool does both: You can resize images to new dimensions AND compress them to reduce file size simultaneously, providing the best of both worlds for web optimization.

No strict limits, but performance considerations:

• Recommended Batch Size: 50-100 images for optimal performance
• Device Dependent: Actual limits depend on your device's RAM and processing power
• Browser Limits: Modern browsers can handle large batches efficiently
• File Size Impact: Larger individual files will reduce batch capacity

For very large batches (500+ images), consider processing in smaller groups to maintain responsiveness. The tool will show progress indicators for large batch operations.