For uploads that allow 1 MB, you can keep nearly full quality. Add your photos and download JPGs under 1 MB.
Modern phone photos are often 3–8 MB, and many sites and forms cap uploads at 1 MB. This page keeps up to 3840 pixels (4K) and finds the highest quality that fits under 1 MB.
At this size, most people can't tell the result from the original. Use "Compare" with "Actual pixels" to check for yourself.
Yes. The saved file doesn't include EXIF data such as GPS location or camera details.
If your photo was already under 1 MB and well compressed, the tool keeps your original instead of making a worse copy.
No fixed limit. Very large images depend on your device's memory, but normal phone and camera photos work fine.