Photo Aspect Ratio Editor

This tool computes the dimensions or crop region needed to achieve a chosen aspect ratio from an image's original width and height. It is designed for photographers, designers, ecommerce teams, and social media managers who require consistent image framing across assets. Conceptually, it treats the target ratio as a constraint and derives two modes: fit (maximize size within the original bounds) and fill (exceed the bounds to cover the area, with cropping). The core logic parses ratios such as 16:9 or 1.78 and applies scale factors to produce integer pixel outputs. Outputs include new_width_px, new_height_px, and optional crop_bounds to guide exact cropping. This approach supports batch-ready pipelines by returning precise, repeatable results for varied original dimensions. Unique value lies in combining ratio parsing, two framing modes, and clear crop guidance without performing actual image edits. Use cases include preparing product thumbnails in 1:1, banners in 16:9, or social post images in 4:5, ensuring uniform presentation across platforms. Advanced users can compare fit vs fill results to select the best composition, reducing manual trial-and-error cropping. The tool is suitable for workflow automation, asset libraries, and automated resizing pipelines where consistency and speed are essential.