How much can I compress an image?+
Using our High or Max Compress levels, JPG and WebP images can be reduced by 65–95% in file size. PNG images are lossless so compression works best when combined with a Max Width resize.
Will compressing reduce image quality?+
At Medium level (our default), quality loss is minimal and barely visible to the human eye. Use High Quality or Near Lossless levels for important images like product photos.
Can I compress multiple images at once?+
Yes! Select multiple files at once or drag and drop several images together. All will be compressed in batch and you can download them as a single ZIP file.
What formats can I compress?+
JPG, PNG, WebP, GIF, and BMP. For JPG and WebP, compression is highly effective. PNG is lossless so we recommend converting PNG to WebP or JPG for the best size reduction.
Does my image get uploaded to a server?+
No. All compression happens entirely in your browser using HTML5 Canvas API. Your images never leave your device and are never stored anywhere.
What is the best format for smallest file size?+
WebP gives the best compression — about 30% smaller than JPG at the same quality. For photos, use WebP or JPG. For logos and screenshots with transparency, use PNG.