This tool converts genome coordinates and annotation files from the original to the new assembly using an alignment.  The input regions can be entered into the text box or uploaded as a file.  For files over 500Mb, use the command-line tool described in our LiftOver documentation.  If a pair of assemblies cannot be selected from the pull-down menus, a sequential lift may still be possible (e.g., mm9 to mm10 to mm39).  If your desired conversion is still not available, please contact us.