Compress Images

Reduce image file size while preserving quality. Supports JPG, PNG, WebP, and more. Batch compression with instant download. 100% browser-based. Zero uploads.

No Upload Required Batch Compression JPG / PNG / WebP ZIP Download

Drop your images here

or click to browse —select multiple images at once

Supports JPG, PNG, WebP, GIF, BMP • Up to 20 MB per file

How it works

Three simple steps —everything happens in your browser.

1

Upload your images

Drag and drop or click to select multiple images. JPG, PNG, WebP, GIF, and BMP are supported.

2

Choose compression level

Pick Low, Medium, or High. Optionally resize images that are too wide.

3

Download compressed images

Download individually or grab all compressed images as a single ZIP file.

Why choose ToolKnit for Image Compression?

100% Private —No Server Uploads

Your images never leave your device. All compression is done locally using the Canvas API. No data is sent to any server —ever.

Batch Processing

Compress dozens of images at once. All files are processed simultaneously and packaged into a convenient ZIP download.

Smart Compression

Our algorithm adapts to each image type. Photos get JPEG compression, graphics with transparency stay as PNG —always the best output.

Optional Resize

Optionally downscale images that are too large. Perfect for preparing web-ready images or meeting email size limits.

Pro Tips

  • • PNG images with transparency are kept as PNG to preserve the alpha channel.
  • • JPEG/WebP images benefit most from compression —photos can shrink 50-80% easily.
  • • Enable the resize option to automatically downscale images wider than your chosen limit.
  • • For web use, 1920px wide at Medium compression gives excellent results.

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