luma.
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Image compressor

Make JPG, PNG and WebP images lighter, with a clear comparison before you download.

This enlargement would exceed 4K

Enhance the image at its current size instead? AI will refine the image without increasing its dimensions.

Drop your image here

or choose a file from your device

JPG, PNG, WebP · Still images · Up to 40 MiB / 24 MP each⌑ Files stay on your device
No file handy? Start with our example. Downloaded only when you click.
01 Choose your file02 Make your adjustments03 Download & carry on
Read: Smaller images, fewer compromises ↗Report a problem
A FEW SIMPLE STEPS

From file to finished.

  1. 01

    Choose a JPG, PNG or WebP image.

  2. 02

    Choose Fast or Ultra compression, pick an output format, and adjust quality.

  3. 03

    Compare the result and download the version you prefer.

When to use Ultra compression

Ultra uses dedicated local encoders: AVIF, MozJPEG and high-effort WebP. It spends more time searching for efficient encodings and can reduce file size further, without changing dimensions. It is not AI and does not guarantee a smaller result at equal visual quality. Up to 12 megapixels; PNG remains in Fast mode. AVIF output supports transparency, but check your destination: it cannot yet be opened as an input in Luma.

Smaller is not always better

JPEG and WebP trade detail for smaller files. Start around 80% and inspect text, edges and skin tones. If the result is larger than your original, keep the original or lower the quality.

Why the PNG quality slider is disabled

Browser PNG encoding is lossless and ignores a quality setting. To reduce a PNG substantially, resize it or use WebP. JPEG removes transparency and uses the background color you choose.

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