Reduce image size up to 90% without quality loss — 100% free, runs in your browser
Most photos straight from a phone are two to five megabytes, which is far more than any website needs. Compressing them cuts load time, saves your visitors mobile data, and helps your Core Web Vitals scores. Use the quality slider to find the point where the file is small but the picture still looks right.
Around 75 for photographs. Screenshots and graphics with text hold up better at 85 or higher, because compression blurs sharp edges first.
It was probably already compressed. Running compression twice gains very little and slowly degrades the image, so compress from the original whenever you can.
No fixed limit, but very large images may be slow on older phones, since everything is processed by your own device.
Yes, though PNGs are converted to JPEG during compression. If you need transparency, use the WebP converter instead.