Compress Images
Reduce image file size while maintaining visual clarity.
How it works
Select Images
Upload one or more images for compression.
Choose Quality
Pick the compression level that fits your needs.
Download
Download optimized images individually or as a ZIP.
About This Tool
Large image files slow down websites, fill up storage, and create friction when sharing. JustConvert's Image Compress tool reduces the file size of JPG, PNG, and WebP images using smart compression algorithms that maintain strong visual quality at significantly smaller sizes.
Batch compression lets you upload multiple images at once. Three quality presets — Maximum Compression, Recommended, and Minimal Compression — give you control over the size-vs-quality trade-off. All compressed images are available as individual downloads or a batch ZIP file.
- check_circleSupports JPG, PNG, and WebP images
- check_circleBatch compress multiple images at once
- check_circleThree compression quality levels
- check_circleSmart algorithms retain visual clarity
- check_circleDownload all images as a single ZIP
- check_circleNo watermarks added to compressed images
Frequently Asked Questions
How much can image compression reduce file size? expand_more
On the Recommended setting, most JPEG images see 30–60% size reduction. PNG images vary more: detailed photos may reduce by 20–40%, while simple diagrams can shrink by up to 70%.
What image formats are supported? expand_more
JPG/JPEG, PNG, and WebP images are all supported. For HEIC photos from iPhone, use our HEIC to JPG tool first, then compress the resulting JPG.
Will the compressed image look different from the original? expand_more
On the Recommended setting, the visual difference is barely perceptible. Maximum Compression produces the smallest file but may show slight quality reduction on high-detail images when viewed at full size.
Can I compress multiple images at once? expand_more
Yes. Select multiple images using the file picker or drag-and-drop several files at once. All will be compressed and available as individual downloads or a ZIP.
Does compressing an image change its dimensions? expand_more
No. Image dimensions (width and height in pixels) are not altered by compression. Only the file size changes by encoding the same pixel data more efficiently.