Picture image
File type: Bitmap image file
An rlh file is a compressed picture image in the RLH picture image format, which used run-length and Huffman encoding techniques.
File type category:
Bitmap image file
Date updated: October 14, 2026
The RLH picture image format stores compressed image data using run-length and Huffman encoding techniques.
The format seems to be obsolete and is not supported by current picture image viewers or editors.
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