How to Compress an Image Without Losing Quality

You cannot shrink every photo and keep every pixel identical. What you can do is pick a format and quality so the file is much smaller while the picture still looks acceptable for its use — email, a website, or print.

Match the format to the image

• Photographs: JPEG or WebP at 70–85% quality is usually enough for screens.
• Screenshots and UI: PNG keeps sharp edges. Re-encoding as JPEG introduces blocky text.
• Already-tiny PNGs of icons often will not shrink much. That is expected.

Resize before you compress

A 4000-pixel-wide holiday photo used as a 400-pixel blog thumbnail wastes most of its bytes. Use the Image Resizer first, then compress. The two tools are separate on purpose so you can see each step.

How this site’s compressor works

The Image Compressor decodes the file in your tab, draws it to a canvas, and re-encodes at the quality you set. It shows original vs new size so you can decide whether the trade-off is worth it. Nothing is sent to a server.

If you need a legally lossless archive, keep the original. Compression for the web is a copy, not a replacement for the master file.