Compress Image
Compress any JPG, PNG, WebP, or AVIF image to a smaller file size with quality control.
ここにimageをドロップ
またはコンピュータやスマートフォンのファイルを参照
How to use Compress Image
Select or drag and drop an image from your device.
Pick the output format and move the quality slider toward 'Smaller file' or 'Higher quality'.
Click 'Compress Image' to encode a new optimized file locally in your browser.
Compare the before and after sizes, then download the compressed image.
Frequently Asked Questions
Does image compression reduce quality?
Lossy compression (JPG, WebP lossy, AVIF) can slightly reduce quality in exchange for much smaller files. You control the trade-off with the quality slider. PNG output is lossless but usually larger.
Are my images uploaded to a server?
No. Aback Images compresses everything inside your browser using native image codecs. Your files never leave your device.
Which format should I choose?
WebP or AVIF for photos on the web, JPG for maximum compatibility, and PNG for screenshots or images with transparency that need lossless output.
How much smaller will my image get?
Photographs typically shrink 50-80% when converted to WebP or AVIF at quality 80. Screenshots and already-compressed files see smaller gains.
More Free Browser Image Tools
Every tool runs 100% locally in your browser memory with zero server uploads.