Processing images individually becomes impossibly tedious with dozens or hundreds. Batch processing applies operations to multiple images simultaneously turning hours into minutes.
Common Operations
Format conversion changes types like PNG to WebP. Batch resizing scales to consistent dimensions. Compression reduces sizes across folders. Renaming applies consistent conventions to organize collections.
Online vs Desktop
Browser tools handle 20-50 images without installation. Desktop apps process thousands faster. Choose based on typical batch size and frequency of need.
Tips
Preview samples before full batches. Keep originals since lossy operations cannot be undone. Organize into input and output folders. Process largest and smallest first as spot checks.