WeVividWeVividCrop a photo to a square, 4:5, 16:9 or passport-style 35:45, cropped from the centre at full resolution.
This tool crops from the centre automatically. For manual positioning, crop the photo first in your phone's gallery app, then use this tool if you need an exact ratio.
No — cropping keeps the full resolution of the kept area; only the parts outside the chosen ratio are removed.