Image Compressor

What the Image Compressor does

The Image Compressor reduces a JPG or PNG image's file size while letting you control the quality tradeoff, processing everything locally in your browser so the original image never leaves your device.

How to use it

1. Choose an image file (JPG or PNG).
2. Adjust the quality setting to balance file size against visual quality.
3. Download the compressed image once you're happy with the result.

Common uses

• Shrinking image file sizes before uploading them to a website for faster load times.
• Reducing photo file size to fit an email attachment limit.
• Compressing images before adding them to a portfolio or presentation.
• Preparing product photos for an online store without sacrificing too much detail.
• Reducing storage space used by a large batch of photos.

Good to know

JPG compression is lossy — some image detail is genuinely discarded to save space — so it's a good idea to always compress from an original, uncompressed source file rather than re-compressing an already-compressed image, since quality loss compounds each time a lossy format is re-saved.

The visible quality loss from JPG compression comes from deliberately discarding information the human eye is less sensitive to (subtle color variations more than brightness variations), which is why JPG compression can achieve dramatic file size reductions with only modest visible quality loss for photographs specifically — the same technique works far less well for images with sharp edges and flat colors, like screenshots or logos, which is why PNG remains the better choice for that kind of content.