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Image size guides

Plain answers about file sizes, upload limits and image formats — so your photo gets accepted the first time.

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ReferencePhoto size limits for online forms, in KB and pixelsWhy uploads get rejected, and the typical KB and pixel ranges for passport, visa, exam and job portals.
How-toHow to reduce a photo's file size on iPhone and AndroidBuilt-in ways to make phone photos smaller, and a browser method that lands on an exact KB target.
ExplainerKB vs MB: what image file sizes actually meanHow many KB are in a MB, why computers disagree, and how big a photo is at common resolutions.

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