ps to jpeg conversion is typically the case of 'recovery' of previously exported graphics files (in this case JPEG) to PostScript format, which means it should be doable.
Standard raster graphics editors usually do not support PostScript formats, so you will have to rely on some dedicated converters or use some professional graphics editors that do. Software from Adobe or Corel is likely your best option, for example Photoshop.
Updated: September 11, 2023