How to Compress Images Without Losing Quality

Quick answer: Image compression is a quality-vs-size tradeoff. JPEG quality at 70-85% is usually visually lossless and halves the file. Use the Image Compress tool — everything runs locally in your browser.

Steps

1. Open Image Compress and drop images (JPEG/PNG/WebP, up to 20 files).
2. Adjust the quality slider: start at 70%, lower for smaller files.
3. Preview the before/after comparison.
4. Download the compressed images.

Quality Guide

• Social media: 70-80% quality, half the size, visually identical
• Web display: 60-75%, combined with size reduction
• Archive: 90-95%, near-original
• Email attachment: 50-70%, control total size

Important notes

• PNG compression: PNG is lossless, so compression works by reducing colors — limited effect. For large PNGs, convert to JPEG.
• WebP advantage: Same visual quality at 25-35% smaller than JPEG, but compatibility is lower.
• Don't compress repeatedly: Each save re-encodes and compounds quality loss.
• Keep the original: Always back up before compressing.

Common questions

The image looks blurry after compression — Quality was set too low (below 40%). Raise it above 60% and retry. PNG size didn't change much — PNG is lossless; for significant reduction, convert to JPEG format. Can I batch compress? Yes, up to 20 images at once with unified quality settings.