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Compress your EXE/DLL executable files in smaller size (up to 200-300%) for best disk perfomance! Program uses UPX for compression and tries many tuning parameters for a smaller size. Programs and libraries compressed by UPX are completely self-contained and run exactly as before, with no runtime or memory penalty for most of the supported formats. 5 levels of LZMA optimization. Batch processing of files (drag-n-drop). Reduce the size of your files in one click! Program optimizes your file to new one with «_optimized» name ending (source file will remain intact). Test after compression.