The face should take up 80–85% of the photo, from the top of the hair to the bottom of the chin.
Take off your glasses, keep your mouth closed and look straight at the camera.
In India the photo is usually taken at the Passport Seva Kendra; the upload is mostly needed when applying from abroad.
How to do it with Requisito Listo
Open the «Indian passport photo» template in the app.
Take the photo with the on-screen guide (or pick one from your gallery).
The app centers your face, makes the background white and gets the exact size and file weight.
Check the checklist, then upload or save it.
At the end you'll see a checklist: size, file weight, background and format. If something doesn't comply, it tells you what to fix before the portal rejects it.