How to compress images for web without losing quality?

Browser-based compression with quality control — free and private.

Optimizing images for faster page loads is the single most impactful performance improvement for most websites. Unoptimized images account for 50-80% of total page weight, directly affecting load times, SEO rankings, and user experience.

ConvertCraft’s Image Compressor uses smart compression that analyzes each image individually. Photos get perceptual lossy compression while graphics with text get lossless PNG optimization.

To compress: open the Image Compress tool, drop your images, adjust the quality slider (default 85% for web), and click Compress. The tool shows before/after file sizes for each image.

For maximum web performance, target file sizes of 100-200KB for hero images and 30-80KB for thumbnails and content images. The quality slider lets you find the exact balance for your needs.

Batch compression processes up to 50 images at once. The tool handles JPG, PNG, WebP, and AVIF inputs and outputs compressed files in the same format — or you can convert to a more efficient format during compression.