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Test pattern generator

Draw a pattern at any resolution, including odd LED canvases and multi-projector blends, and save it as a PNG. Free, in the browser, nothing to install.

Free in the browser · Updated November 2026

LED walls rarely land on a standard raster: a 12 by 6 wall of 500 mm panels at 2.6 mm is 2,304 by 1,152 pixels. Projector blends add overlaps. This generator draws the pattern at exactly the size the processor or media server expects, so you can check mapping, seams and blends before the content arrives.

  • Pixel: a grid of displays or projectors with overlap, numbered cells, circles and a border.
  • Metric and Domemaster patterns for physical layouts and domes.
  • Utility: colour bars, greyscale, pixel checks and solids at any size.

Everything runs in your browser: nothing is uploaded. For standard rasters, the test pattern pack has seventeen ready-made patterns at six sizes.

Works best on a laptop or desktop. Open the generator full screen.

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