What is a RLE file?
The .RLE file extension generally stands for Run-Length Encoding. This is a basic form of data compression. The most frequent modern use is for a Golly Simulation Pattern File. Software like Golly uses .RLE to store patterns for Conway's Game of Life. Other common uses include compressed raster images for older Microsoft Windows systems, CAD raster images by Intergraph, and game graphic assets for classic titles like *Stronghold* and *Age of Empires II*.
How to open RLE files?
Because .RLE files have multiple possible meanings, it can be difficult to know which software to use. For cellular automata patterns, Golly is the standard application. For older compressed bitmap images, universal image viewers like XnView or IrfanView are required.
Best practices and troubleshooting
If your .RLE file is a Golly pattern, it is a simple text file. You can inspect it using any text editor to verify its contents. If it is a binary image or game asset, it might be heavily tied to a specific video game engine. You can also convert .RLE image files to more modern target formats. We recommend using convert.guru to easily convert visual .RLE images to .PNG or .JPG formats.
Summary
viewer.online/rle analyzes .RLE files to identify their exact format and creator software, shows which programs can open the file, and usually previews it. Because .RLE has multiple possible meanings, we recommend using viewer.online/rle to identify the actual format of your file. viewer.online/rle directly opens and previews .RLE files in the browser, eliminating the need to install software or troubleshoot compatibility issues.