Reduce Image File Size

About Reduce Image File Size

Large image files slow down websites, eat up storage, and make emails and uploads frustrating — often with no visible quality difference between the original and a properly compressed version. Most images, especially photos, carry far more data than the eye can actually distinguish, which is exactly the gap compression exploits.

This tool re-encodes any image as JPEG or WebP with an adjustable quality slider, letting you directly trade off file size against visual fidelity. WebP generally achieves smaller files than JPEG at equivalent visual quality, making it worth trying first if your use case supports it (nearly all modern browsers do).

The before-and-after file size comparison updates instantly as you adjust quality, so you can find the point where file size drops significantly while the image still looks essentially identical — usually somewhere in the 60-80% quality range for photos, though it varies by image content.

This is useful for shrinking images before uploading to a website (faster page loads, better SEO), reducing attachment size for email, saving storage space across large photo collections, and any situation where a smaller file size matters more than pixel-perfect fidelity.

How it works

1. Upload an image. Any common image format.
2. Choose output format and quality. JPEG or WebP, with a quality slider from 10% to 100%.
3. Compare and download. See the exact before/after size difference, then download the result.