How to Batch Compress and Resize Multiple Images at Once — Free

When You Need Batch Processing

You shot 200 product photos and need them all at 1200px wide under 500KB. An ecommerce upload requires specific dimensions for all catalog images. A website migration needs every image compressed. Processing one at a time would take hours. Batch processing handles them all in minutes.

Batch Compress — Reduce File Size for All Images

1. Open the Compress Image tool
2. Select multiple images at once (hold Ctrl/Cmd to select many)
3. Set your quality level (80% for photos, 85% for screenshots)
4. Download all compressed images

All processing happens in your browser. Even 50 images at once never touch a server — your CPU handles everything locally.

Batch Resize — Same Dimensions for Every Image

1. Open the Resize Image tool
2. Upload multiple images
3. Set target width (height adjusts proportionally)
4. Download the batch

Common batch resize targets: 1200px for blog images, 800px for thumbnails, 2000px for ecommerce product photos.

Batch Convert — Change Format for All Files

Need to convert 100 WebP images to JPG? Or PNG product photos to optimized JPGs?

1. Open the Image Converter
2. Select all images
3. Choose output format (JPG, PNG, WebP)
4. Download the converted batch

The Full Batch Workflow

For maximum efficiency, run the batch in this order:

1. Convert format first — switch all to the target format (usually JPG)
2. Resize second — bring everything to your target dimensions
3. Compress last — squeeze final file sizes down

This order matters because resizing a 10MB PNG then converting to JPG is faster (and produces better results) than converting first.