How to compress an image online

Make JPG, PNG and WebP images smaller for websites, email and social media. SkyTooler is a free online image compressor that works with the files you already have.

1. Click Choose images and select a picture from your device.
2. Select a compression level, from Ultra Small (smallest file) to Large (most detail). Medium is a good first try.
3. Wait a moment while the image is optimized.
4. Download the compressed image.

Supported image formats

JPG, JPEG, PNG, WebP, GIF, BMP, TIFF, HEIC, HEIF, AVIF and a few more.

Tips to reduce image size

• Smaller levels reduce colour detail, so photos with soft gradients can look flatter. Compare the result with the original.
• Mono (Black & White) turns the picture into grayscale, which makes the file smaller still.
• Metadata such as camera details and GPS location is removed from the compressed image.
• If we cannot make the image smaller, you get the original back unchanged.

Frequently asked questions

Is the image compressor free?

Yes. You can compress images on SkyTooler for free.

How do I compress a PNG or JPG without losing too much quality?

Start with Medium or Large. These keep more detail. Use Small, Very Small or Ultra Small only when file size matters more than sharpness.

Does it remove EXIF data?

Yes. Camera information and GPS location stored in the photo are removed from the compressed copy.

Are my images kept?

Images are uploaded over HTTPS, used only for compression and deleted automatically from our servers within 1 hour.

What is the maximum image size?

You can upload images up to 50 MB.