Image Compressor

How to use

1. Drop an image onto the box or click to browse.
2. Adjust quality, maximum width and output format.
3. Compare original and compressed sizes live, then download.

Use cases

1. Use case: Speed up your website Compress hero images before uploading to reduce page weight and improve Core Web Vitals without visible quality loss.

2. Use case: Fit email size limits Shrink attached photos so they pass the 10-25 MB attachment limits of most email providers.

Practical tips

Quality and dimensions compound: a 30 percent reduction from resizing plus a moderate quality step often halves file size with no visible change. For web images, target roughly 100–200 KB per hero image and far less for inline images. Compression is lossy — keep the original, because re-compressing an already-compressed file stacks artifacts. Compare before and after at 100 percent zoom on the most detailed region, not the whole preview. Like every tool on this site, the Image Compressor runs entirely in your browser: the data you enter never leaves your device, nothing is uploaded to a server, and the tool keeps working if your connection drops.

Common mistakes

Compression mistakes compound because the damage is invisible at first:

• Re-compressing an already-compressed file — artifacts stack, so always compress from the original.
• Judging quality on the full-page preview instead of 100 percent zoom on the most detailed region.
• Aiming for minimum bytes on every image; a hero image can carry 150–200 KB while inline images should be far smaller.
• Forgetting that dimensions and quality compound: resizing alone often halves the file before any quality change.

Frequently asked questions