Image Compress
Re-encode images at lower quality to cut file size. Lower quality saves more space but adds visible artefacts.
No files yet. Add some to begin.
🔒 All processing happens in your browser — files never leave your device
How it works
- Add images.
- Choose format and quality.
- Compare sizes and download.
Good to know: Already-optimised images may not shrink. PNG is lossless, so JPEG or WebP is used here.
Limits: JPG, PNG, WebP, and AVIF where browser decoding is supported; up to 30 files, 25 MB each.
Privacy and processing
All processing happens in your browser — files never leave your device
JPG, PNG, WebP, and AVIF where browser decoding is supported; up to 30 files, 25 MB each.
Frequently asked questions
Should I resize or compress first?
Resize to the dimensions you actually need, then compress and compare the result.
Does compression always make a file smaller?
Not always. Some files are already optimized, and PNG can be larger than the source in certain cases.
Will resizing change the original?
No. The tool creates a downloadable result and leaves your source file unchanged.
What does Image Compress do?
Make image files smaller. Re-encode images at lower quality to cut file size. Lower quality saves more space but adds visible artefacts.
Does this tool upload my files or input?
Your input stays in this browser and is not uploaded to Smart Online Tools.