Image Compressor

How to use the Image Compressor

1. Upload or drag and drop one or more images into the compressor.
2. Adjust the quality slider to set your desired compression level.
3. Optionally set maximum dimensions to resize during compression.
4. Review the before-and-after file size comparison.
5. Download the compressed images.

Why 'reduce file size' and 'reduce quality' aren't the same thing, up to a point

Compression algorithms are specifically designed to remove data that has minimal visible impact before they start removing data that's actually noticeable. This is why a moderate compression setting frequently cuts file size dramatically with no perceptible visual difference, and why pushing the slider too aggressively eventually crosses into genuinely visible quality loss (blocky artifacts, color banding). The right setting is usually found by comparing the compressed result directly against the original at real display size, not by targeting a specific percentage reduction blindly.

Frequently asked questions

How much can I compress an image without noticeable quality loss?

It varies by image content, but a moderate compression setting frequently reduces file size significantly with minimal visible difference. Compare the preview against the original directly rather than assuming a fixed percentage works for every image.

Which format compresses best?

WebP generally achieves the smallest file size at a given visual quality level compared to JPEG or PNG, which is part of why it's increasingly the default choice for web images.

Will compressing a PNG lose the transparency?

No. PNG compression here reduces file size while preserving transparency; if you don't need transparency, converting to JPEG or lossy WebP first can shrink the file size further, since neither format carries the alpha-channel overhead PNG does.