What are transparent pixels?

Transparent pixels are image pixels with an alpha channel value that makes them fully or partially invisible. In digital images, particularly PNG format, transparent pixels allow you to see through parts of an image to whatever is behind it. These pixels often form empty borders around the actual content of an image, wasting space and making the image larger than necessary.

Tool Description

This tool automatically removes transparent pixels from the edges of your images. It analyzes your image to find the smallest rectangular area that contains all non-transparent content, then crops out the empty transparent space. The tool provides detailed statistics showing the original and trimmed dimensions, plus how many pixels were removed.

Features

  • Automatic detection of transparent pixel boundaries
  • Visual comparison of original and trimmed images
  • Detailed statistics about dimensions and space saved
  • Supports PNG, GIF, and WebP formats with alpha channels
  • Download trimmed image as PNG

Use Cases

  • Optimize PNG icons by removing excess transparent borders
  • Prepare images for web use by reducing unnecessary file size
  • Clean up screenshots with transparent edges
  • Prepare sprite sheets and game assets for efficient rendering
  • Improve layout of images in designs by removing empty space