Image Compression

Compress PNG/JPG images

Compress while keeping the original image format and preserving transparency

Adjust from 10–100%. PNG at 100% compresses while preserving quality

Upload multiple files together and compress them at the same time

Display the size before and after compression and the reduction rate for each image

Choose PNG and JPG images from the upload field and add multiple at once

Move the slider between 10% and 100%; changes are applied to all images instantly

Check each image's size before and after compression and the reduction rate in the preview

Save them one by one, or save them all at once as a ZIP with "Download all"

Reduce image size to improve display speed and page loading

Shrink attachments with size limits to a sendable size

Reduce device and cloud storage usage to keep more images

Optimize size while keeping image quality to match the limits of posting sites

Your input data is processed only within your browser and is never sent externally.

compressing images is processed entirely within your browser, and input data is not sent to any server.

Page loading is also encrypted by TLS, and content cannot be read by third parties.

Input content is not sent to external services such as ad networks or trackers.

the compressed images and input suggestions are not stored on the server.

2026/07/31update #119
Add image quality explanation in image compressor and display preview larger
Changed the slider label to 'Image Quality' and now displays on screen that images that would become larger after compression will output the original file as-is.
Update Image Compression
2026/07/30update #117
Image Compressor: PNG compression quality slider now applies
At 100% quality, compression preserves image fidelity. Below 99%, file size reduces according to quality level. Transparency is maintained.
Update Image Compression