100% Free In-browser Up to 90% smaller

Compress Images Free Online

Reduce image file size without visible quality loss. Supports JPG, PNG, WebP, GIF, HEIC and more. All processing happens in your browser — your images never leave your device.

Drop images here or click to browse

JPG, PNG, WebP, GIF, HEIC • Batch compress supported

Accepts: .JPG .PNG .WEBP .GIF
Output: same format
1 MB
px
Never uploaded·How to use this tool
0 files
Related tools: Resize Image Remove Background MB to KB Resize to 20KB

How it works

Compress images in 3 steps

1

Upload images

Drop your JPG, PNG, WebP or other images onto the tool. Batch processing supported.

2

Set target size

Choose a maximum file size. The compressor will reduce quality until the target is reached.

3

Download compressed

Download compressed images individually or all at once as a ZIP archive.

FAQ

Frequently asked questions

Typically 60–90% size reduction with little visible quality difference. The amount depends on the original image — photos with lots of detail compress more than simple graphics. PNG files with transparency are compressed to PNG; JPGs are compressed as JPG.

At the default settings, quality loss is minimal and usually imperceptible on screen. If you need to compress to a very small size (like under 100KB), there will be some visible quality reduction. The compressor uses the browser-image-compression library which applies perceptual quality optimization.

Yes. PNG files are compressed as PNG and transparency is preserved. JPG files do not support transparency and are compressed as JPG.

No. The browser-image-compression library processes everything in your browser. Your images never leave your device.

Setting a max width will resize images that are wider than the specified pixel value. This is a powerful way to reduce file size — a 6000px photo scaled to 1920px will be much smaller. Set to a large value (e.g. 8000px) to preserve original dimensions.

The output format matches the input format. JPG in → JPG out, PNG in → PNG out. This preserves the format-specific features (like PNG transparency) while reducing file size.

Everything you need to know about Compress Image

Converting images online has never been easier. JustDownSize processes everything locally in your browser using modern Web APIs — your files never leave your device, so your privacy is always protected.

Why use JustDownSize for compress image?

Unlike server-based tools that upload your files to remote servers, our tool runs entirely client-side. This means instant processing with no waiting in queues, no file size limits imposed by server constraints, and complete privacy — what you convert stays on your device.

Frequently asked questions about compress image

Our FAQ section above answers the most common questions. If you have additional questions, feel free to contact our support team.