Free tools for detecting edited images usually rely on pattern analysis, error level analysis, and pixel-level comparisons. Platforms like FotoForensics or Forensically are useful because they reveal hidden compression changes and inconsistencies that are hard to notice visually. For students learning how these detection methods work, understanding the math behind pixel distributions and graph patterns can make the process clearer. Simple graphing and statistical visualization tools also help when analyzing image data sets or experimenting with detection techniques. A lightweight browser-based calculator can be useful for quick calculations during practice: https://smart84calc.com/
