Crop · Browser-first processing
Use the calculator without a file or load an image to create a centre-cropped result for common and custom ratios.
Select a supported file or enter the requested values, then run the tool.
Closing or refreshing this page clears the selected files and generated result. Downloaded files are created as new copies and never overwrite the source.
Common questions
Aspect Ratio Toolkit reads the selected input into browser memory and performs its documented operation on this device. It does not submit the source file to ImgNimble while using this browser-first workspace.
Calculated dimensions and, when an image is selected, a cropped PNG or JPEG.
Aspect ratio describes shape, not resolution or quality. Centre cropping may remove content near the edges.
Practical checks
Use the calculator without a file or load an image to create a centre-cropped result for common and custom ratios.
Keep the source, download the Aspect Ratio Toolkit result as a new file, and verify dimensions, transparency, colour, metadata and visual detail before replacing any production asset.
Continue the workflow
Resize images to exact pixels or a percentage while optionally preserving the original aspect ratio.
Centre-crop images to current common post, story, thumbnail, banner and profile presets.
Align and size a portrait using adjustable visual guides and common document-photo canvas presets.