Online forms refuse photos for reasons they rarely explain: wrong pixels, wrong file size, wrong shape. This makes the picture the form will accept, chosen by what it is for rather than by numbers you have to look up.
Resize a photo for a form →Free every day without an account on some tools. Your file is deleted the moment the job finishes.
Pick the form — Indian passport, US or Schengen visa, PAN, driving licence, voter ID, Aadhaar, an exam photo, a signature, a thumb impression — and the size and file limit are set for you. The picture is cropped to fill the frame rather than squashed, because a stretched face is rejected by the same clerk who would have accepted a cropped one, and the quality is tuned down only as far as it must go to fit the limit.
Passport, visa, PAN, Aadhaar, driving licence, SSC, UPSC and the common state exam boards, each with its own pixel size and KB ceiling.
It will not be by the time you download it. The photo is compressed until it sits under the limit the form names, and the quality is dropped only as far as it has to be.
Yes, if the face is lit from the front and the background is plain. The crop and the background can be fixed here; a shadow across the face cannot.