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Auto-Trim

Automatically crop empty transparent edges, or a solid background, from many PNG images at once, in your browser, and download them as a ZIP.

What it does

  • Bulk trimming of transparent or solid-color edges
  • Adjustable alpha threshold, background tolerance and padding
  • See exactly what was cropped before you download
  • Download one image or everything as a ZIP — nothing is uploaded

FAQ

Are my images uploaded to a server?

No. Trimming happens on a canvas in your browser, so your files never leave your device.

Can it remove a white background?

It can crop away a solid border that matches the top-left pixel, within a tolerance you set. It does not cut the background out from around the subject.

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