Photo BMP Resizer

This tool resizes BMP images to precise pixel dimensions or via a scale factor, producing deterministic outputs for web thumbnails, game assets, apps, and archives. Primary users include designers, developers, and content teams requiring consistent BMP sizes without lossy formats.

Conceptually, the tool loads a source BMP, validates format, and computes target dimensions using the chosen input mode. If width/height are provided, aspect ratio rules apply; when preserve-aspect is on, the scale factor is the smaller of width/orig and height/orig, ensuring the entire image fits without distortion. If a scale factor is used, both axes multiply uniformly. Optional padding or cropping can fill remaining space to reach the exact canvas size. The BMP color depth is preserved when feasible; otherwise a conversion occurs with minimal artifacts. Outputs include the new size, file path, and a summary of changes.

Outputs are written to a specified path with a descriptive file name and metadata noting original vs target sizes. Validation catches zero or negative dimensions, non-BMP inputs, and permissions issues. The tool handles large images via streaming processing to avoid memory spikes and maintains deterministic results across platforms, suitable for automated pipelines.

Use cases include web thumbnails, texture resizing for engines, distribution-ready assets, and batch resizing in content workflows. By avoiding lossy compression and delivering clear dimension logic, it offers robust predictability for asset prep and archiving.