Compress Image Online

How to compress an image

Compression reduces the number of bytes an image takes up while keeping it visually close to the original. Upload your photo, choose how aggressive the compression should be, and download a much smaller file.

• Drag a JPG, PNG or WebP into the upload area.
• Drag the quality slider — higher means better quality and a larger file; lower means a smaller file.
• Or switch to target-size mode and type a size such as 200 KB; the app searches for the highest quality that fits.
• Compare the before and after size, then download.

Quality slider vs target size

The quality slider gives you direct, predictable control and is great when you know roughly what trade-off you want. Most photos look excellent at 70–80% quality while being a fraction of their original size.

Target-size mode is the smarter choice when a platform imposes a hard limit — an upload form that rejects files over 1 MB, for instance. ImgWus runs a binary search across quality levels to land just under your target, so you get the best possible image at that size automatically.

Smart, format-aware compression

JPEG and WebP are compressed with perceptual encoders that remove detail the human eye barely notices. PNG images are optimized with maximum lossless compression and optional palette quantization, which is ideal for logos, icons and screenshots with flat colors.

For photographs, converting to WebP during compression typically saves another 25–35% over JPEG at the same visual quality — a single setting away in the format selector.

Faster sites, smaller bills

Compressed images load faster, rank better, and cost less to serve. If you run a store, a blog, or a portfolio, compressing every image before publishing is one of the highest-impact performance wins available — and it takes seconds here.