Compress an image to 30 KB
A 30 KB cap sits just above the thumbnail range. A small face photo or an exam headshot fits and still reads clearly, though large dimensions will soften. Set the compress to size tool to 30 KB for a clean small portrait.
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What 30 KB keeps
At 30 KB you get a workable photo around 250x250 to 350x350 pixels. A face stays recognizable with natural color, and a small exam headshot looks acceptable. It is the point where a portrait starts to feel like a photo rather than an icon.
If your source came straight off a phone, resize the image first to roughly 300 pixels on the long side. That single step usually drops you near 30 KB before the compressor has to touch quality much.
Where the 30 KB cap lives
Some exam registration systems and older job portals ask for a face photo under 30 KB. They want a clear small headshot without storing a heavy file for every candidate.
Crop to the head and shoulders before compressing. A tight frame means the budget goes to the face instead of a wide background, so the part that matters stays sharper.