Square to Circle Editor

This tool converts a source image into a circular crop, centering on the subject and discarding extraneous areas. It defines a square crop region from the original image to ensure consistent circle boundaries, then applies a circular mask for a round asset ideal for avatars and profile pictures. The process preserves central content while delivering a clean circular silhouette.
Mask edges employ anti-aliasing to soften boundaries, producing smooth transitions at all radii. If a background color is provided, the circular region can be rendered on that color for JPEG exports; otherwise, transparency is preserved in PNG outputs. The algorithm works without rotation or distortion, maintaining content orientation within the circular frame.
Inputs required are a source image and optional settings: diameter_px, output_format (PNG or JPEG), and background_color. Outputs include the final circular image, its dimensions, and the selected format. Typical use cases include social media avatars, app icons, and circular thumbnails on websites.
By standardizing circle crops, the tool reduces manual editing time and ensures consistent branding across teams. It supports batch-ready processing and can be integrated into pipelines that produce ready-to-use assets for multiple platforms, improving efficiency and reducing errors in avatar creation.