ShadowToolkit

Batch Image Compressor

Compress multiple images at once locally on your computer.

100% In-Browser
All-In-One StudioBulk + Single

Want to process images in bulk, add compressions, conversions, filters & background removal all in one flow?

Try Image Playground
100% In-Browser PrivacyLocal

Your files and data are processed locally and never leave your device.

Upload files for Batch Image Compressor

Select up to 100 files to batch process locally in your browser

Max size: 600MB •100% In-Browser

What is Batch Image Compressor?

Batch Image Compressor enables you to optimize, resize, and compress dozens of photos simultaneously directly within your web browser. Utilizing multi-threaded Web Workers, it processes entire folders of images and bundles the results into a single downloadable ZIP archive.

Zero-Server Client-Side Guarantee

Unlike legacy online utilities that upload sensitive media and documents to remote cloud storage, Shadow Toolkit executes this entire operation directly within your browser's local runtime. Your raw data never crosses the network.

Key Capabilities

  • Concurrent multi-image batch compression in local browser memory
  • Uniform quality and target size controls across all queued assets
  • Real-time batch progress tracking with total megabytes saved metric
  • Single-click 100% client-side ZIP archive generation
  • Complete privacy—no photos uploaded to any external server

Common Use Cases

1Batch optimizing product catalogs for e-commerce website migrations
2Compressing hundreds of event photos before sharing with clients via cloud storage
3Shrinking digital camera roll exports before backup archiving
4Optimizing raster graphics and illustrations for high-performance responsive web design and mobile apps

How to use Batch Image Compressor

01

Select Multiple Images

Drag and drop a folder or select dozens of images at once.

02

Set Batch Rules

Configure compression quality percentage or specify a maximum width/height.

03

Batch Processing

Watch real-time progress as images are compressed in parallel.

04

Download ZIP

Click 'Download All as ZIP' to receive your optimized archive.

Frequently Asked Questions

You can comfortably compress 50 to 100+ images in a single batch on modern desktop computers.

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