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ID Photo Size Guide: What 1-Inch and 2-Inch Really Mean, Plus Exam Registration Scenarios

The 1-inch 25×35mm vs 2-inch 35×49mm reference with pixel conversions, background-color conventions (white/blue/red) for certificates and exams like the postgraduate entrance exam, CET, and teaching certification, and the full workflow from phone photo to compliant ID picture.

HEIC to JPG: The Complete Guide — Why Systems Reject iPhone Photos and Three Ways Through

The root cause behind format-not-supported errors on exam registrations, visa uploads and government portals: what HEIC is, why legacy systems only accept JPG, and the trade-offs between changing capture settings, transfer-time conversion, and after-the-fact conversion — plus the privacy angle of batch processing.