Image Resize

Purpose and scope: This tool computes new image dimensions from an original width and height and target dimensions, enabling consistent asset sizing across web, print, and social channels. It is intended for designers, developers, and marketers who need deterministic outputs without modifying actual image data.
Core capabilities: input original_w and original_h (px), target_w and/or target_h (px), preserve_aspect_ratio (boolean), and optional output_format. The tool validates positive integers and handles missing values by deriving the missing dimension when aspect ratio is locked.
Concept: it performs dimension calculations (no image processing) to produce final dimensions that can be applied to an asset. Unique value: separation of dimension logic from file operations, supporting repeatable sizing and automation.
Use cases: preparing thumbnails (e.g., 300x300), hero images (e.g., 1200x630), and social uploads with consistent dimensions. Features include strict input validation, clear output dimensions, and support for simple batch-ready values for downstream editors.
Audience and impact: content teams, studios, and developers seeking fast, network-free dimension planning to accelerate publishing workflows and ensure asset readiness across channels.