ImgOptimizer — Free Online Image Optimizer

ImgOptimizer is a free, browser-based image optimization tool. Compress, resize, and convert images to JPEG, WebP, AVIF, or PNG format instantly — no upload required, no server processing. Your images never leave your device.

Features

Developer API

ImgOptimizer provides a REST API at imgoptimizer.com/api/img for programmatic image optimization. Free plan includes 500 requests per month. Sign in with Google to get your API token.

How to use

Drop an image file onto the page, paste an image URL, or click to browse. Adjust quality, size, and output format using the controls. Download the optimized image or copy the URL.

ImgOptimizerv1.23

Free Image Optimizer

Compress, resize & convert images in your browser — no upload, 100% private.

No uploadJPEG · WebP · AVIF · PNGBatch supportFree API

Drop, paste or click to browse

AVIF · WebP · JPEG · PNG · Multi-file

or

Why use ImgOptimizer?

Faster Pages

Smaller images load faster, improving UX and Core Web Vitals scores.

Better SEO

Google rewards fast sites. Optimized images directly boost your search rankings.

Save Bandwidth

Less data transferred means lower hosting costs and faster mobile loading.