Find a useful balance between detail and size
- Choose a JPG, still PNG or still WebP.
- Start with Balanced (60). Try Stronger (35) for more compression, or Gentler (85) to retain more detail.
- Preview the result. Toggle Original and the labeled quality result at 100% size to inspect faces, fine text and edges.
- Check the actual file size and download the version you prefer.
What the quality number means
This number controls the new encoder. It is not a measured percentage of the original image's quality, and it does not report the original file's quality setting. Every preview starts from your uploaded image, avoiding repeated compression of earlier results. Dimensions stay unchanged. Lower settings usually reduce bytes but can add visible artifacts. A new file may still be larger than the original.
Transparency and format
JPG uploads default to JPG output. PNG and WebP uploads default to WebP so transparency is retained. You can choose either output format. JPG needs a solid background for transparent pixels; WebP keeps alpha. PNG has no comparable lossy-quality slider, so PNG input is converted. Keep the original when exact pixels matter. For a required file-size limit, use Compress image to target size.
Local processing
No upload or saved drafts. Still files only, up to 10 MiB, 12 million pixels and 4,096 pixels per side. Animation is rejected. Metadata is removed. Browser color management and encoding can vary. Undo restores your image, quality, comparison view and completed download after edits or Clear, until a successful preview or accepted replacement. Cancel retains available work; native operations may finish in the background, with 30-second wait deadlines. Bad replacements preserve your previous image and ready download.