Image Compressor

Reduce image file size, target a maximum KB value, or change resolution and output format.

Upload your images

JPGJPEGPNGWebPAVIF+14 more

How to use Image Compressor

  1. 1

    Upload your images by clicking the upload zone or dragging them in - JPG, PNG, WebP, and other formats are supported.

  2. 2

    Choose your output format from the format dropdown if you'd like to change it.

  3. 3

    Adjust compression settings - you can set a maximum file size in KB or let the tool optimize automatically.

  4. 4

    Click "Process Images" and download your smaller files instantly.

What Else You Can Do

  • Target file size - enter a KB limit and the tool will aim as close to it as the image allows.
  • Resolution adjustment - resize the image at the same time you compress it.
  • Format conversion - switch between PNG, JPG, WebP, AVIF, and more during compression.

Compress Images Online; Smaller Files, Same Quality

Reduce image file size, target a maximum KB value, or change resolution and output format. Use the controls shown on the page, process the selected file or files, and download the result.

Quality, target KB, resolution and fit controls can be combined. Multiple results are packaged as a ZIP. Upload multiple files and batch-process them for free, with no sign-up or ToolSpice watermark.

Frequently Asked Questions

What compression method does this tool use?
It depends on the selected output format and settings. JPG and WebP normally use lossy compression; PNG can use lossless compression unless you also change its dimensions or convert from another format.
Why is my compressed PNG still large?
PNG compression is lossless when dimensions and format stay unchanged, so savings may be limited. For a smaller result, try WebP or JPG and compare the output because the reduction varies by image.
Can I set a specific target file size?
Yes. Enter a maximum size in KB and the tool iteratively adjusts quality to get as close as possible. Results depend on the image and work best with JPG and WebP.
Can I resize images while compressing them?
Yes. Use the resolution adjustment option to scale down the image at the same time you compress it - great for quickly preparing images for the web or social media.
Can I change the image format during compression?
Yes. You can switch between PNG, JPG, WebP, AVIF, and other formats right from the format dropdown. Converting to WebP or AVIF often gives you the best size-to-quality ratio.

Related Tools

Other free tools in this category you might find useful:

Resize Image
Image Converter
Crop Image
Background Remover
Aspect Ratio Changer
Image Merger