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Compress Image

PopularBatch

Reduce image file size with a target size and quality slider, and compare the result against the original before downloading. Compression runs on your device, so your photos are never uploaded.

Processed on your device Image toolsAccepts JPG, PNG, WebP, GIF, BMP, AVIF

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How to use Compress Image

  1. 1

    Add one or more images.

  2. 2

    Set the maximum file size, quality and output format.

  3. 3

    Compare before/after and download.

Features

  • Target maximum size in KB/MB
  • Quality slider with live preview
  • Draggable before/after comparison
  • Runs in a Web Worker

Frequently asked questions

How do I compress an image to 100 KB?

Set the maximum size to 100 KB and compress. The quality is lowered step by step until the file fits under the limit.

Will compression reduce image quality?

Lossy formats trade a little detail for size, but at 75–85% quality the difference is hard to see. Use the before/after slider to check before you download.

Which format compresses best?

WebP is usually 25–35% smaller than JPG at the same visual quality. PNG is best for graphics with flat colours.

Are my files uploaded to a server?

No. Compress Image runs entirely in your browser, so your files stay on your device. Nothing is uploaded, stored or seen by anyone else.

Is Compress Image free?

Yes. It is completely free, with no sign-up and no watermarks.