Performance

Image Compressor

Paste an image URL and we'll fetch it, sniff the format and dimensions, then estimate how much you could save by compressing it to a modern format like WebP or AVIF.

What is an image compressor?

An image compressorshrinks an image's file size so pages load faster. This tool analyzes any image and estimates how much smaller it would be as WebP — so it works as a webp compressor and webp size reducer.

Compress images to WebP

WebP is typically 25–35% smaller than JPG or PNG at the same quality. Whether you want to compress webp further, convert jpg to webp, or compress png to webp, this tool shows the size win first so you know it's worth it.

Why image compression matters

Images are usually the heaviest assets on a page. Compressing them — especially to next-gen formats like WebP — cuts page weight, speeds up loading, and improves Core Web Vitals (LCP in particular).

How to use the image compressor

  1. Paste an image URL.
  2. We detect its format, dimensions and size.
  3. Review the estimated WebP/AVIF savings.
  4. Re-encode to WebP and re-upload to capture the savings.

More performance tools

Pair this with our Page Speed Test, CSS Minifier, JS Minifier and the full free SEO tools suite.

Frequently asked questions

An image compressor reduces an image's file size so pages load faster. This tool fetches any image, detects its format and dimensions, and estimates how much smaller it would be as a next-gen format like WebP — so it works as a WebP compressor and size reducer.
WebP is a modern image format from Google that's typically 25–35% smaller than JPG or PNG at the same quality. Compressing images to WebP cuts page weight and improves load time and Core Web Vitals — without a visible drop in quality for most images.
Paste the image URL and run it. We analyze the current format and size and estimate the WebP savings, so you can see the benefit of converting JPG or PNG to WebP before you re-encode and re-upload.
WebP keeps near-identical visual quality at a much smaller size for typical photos and graphics. You can tune the quality when you export; for most web images the difference is invisible while the byte savings are significant.
Completely free and online, with no account required. It's part of WebsiteAuditTools' free suite of performance tools.