# pamfix > Fix errors in PAM, PBM, PGM and PPM files. > See also: `pamfile`, `pamvalidate`. > More information: . - Fix a Netpbm file that is missing its last part: `pamfix -truncate {{path/to/corrupted.ext} > {{path/to/output.ext}}` - Fix a Netpbm file where pixel values exceed the image's `maxval` by lowering the offending pixels' values: `pamfix -clip {{path/to/corrupted.ext}} > {{path/to/output.ext}}` - Fix a Netpbm file where pixel values exceed the image's maxval by increasing it: `pamfix -changemaxval {{path/to/corrupted.pam|pbm|pgm|ppm}} > {{path/to/output.pam|pbm|pgm|ppm}}`