What format is the output?

The output is a PNG with transparent corners, so the circle can be placed on any background cleanly. Processing runs on your own self-hosted server with no file uploads to third parties.

Can I adjust which part of the image is centered?

The crop centers on the image by default, which works well for centered subjects. For off-center subjects, consider cropping the source first, then applying the circle crop on your local SnapOtter instance.

Does it handle non-square images?

Yes, it auto-centers and crops to a circle inscribed within the smaller dimension. Rectangular images work fine, and since it runs locally, you can experiment with different source crops at no cost.

Layout & Composition

Circle Crop

Crop any image into a perfect circle centered on the original, with transparent corners for clean overlay on any background. Ideal for avatars, profile pictures, and design elements. Runs instantly on your self-hosted SnapOtter instance with no external services involved.

Deploy with Docker View Source

Features

Centered circular crop with transparent PNG corners
Preserves original image resolution within the circular area
Works with any input aspect ratio by auto-centering the crop
Clean anti-aliased edges for smooth circular outlines
Batch processing for generating many circular images at once

What you can do

Creating circular avatar images for user profiles on a web application
Preparing round headshots for printed name badges and conference materials
Making circular product thumbnails for a visually consistent catalog grid
Generating round social media profile pictures from rectangular source photos

Self-hosted. Your files never leave your network.

SnapOtter runs entirely on your own infrastructure. Files processed with Circle Crop are never uploaded to third-party servers. Deploy a single Docker container and process files with full privacy, no watermarks, and no usage limits. Open source under AGPL-3.0.

Frequently asked questions

What format is the output?: The output is a PNG with transparent corners, so the circle can be placed on any background cleanly. Processing runs on your own self-hosted server with no file uploads to third parties.
Can I adjust which part of the image is centered?: The crop centers on the image by default, which works well for centered subjects. For off-center subjects, consider cropping the source first, then applying the circle crop on your local SnapOtter instance.
Does it handle non-square images?: Yes, it auto-centers and crops to a circle inscribed within the smaller dimension. Rectangular images work fine, and since it runs locally, you can experiment with different source crops at no cost.

More Layout & Composition tools

Collage / Grid

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Learn more Stitch / Combine

Join images side by side, stacked, or in a grid

Learn more Image Splitting

Split images into grid tiles or by pixel size with live preview

Learn more Border & Frame

Add borders, rounded corners, shadows

Learn more

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