```bash
bgzip -h
```

Version: 1.19
Usage:   bgzip [OPTIONS] [FILE] ...
Options:
   -b, --offset INT           decompress at virtual file pointer (0-based uncompressed offset)
   -c, --stdout               write on standard output, keep original files unchanged
   -d, --decompress           decompress
   -f, --force                overwrite files without asking
   -g, --rebgzip              use an index file to bgzip a file
   -h, --help                 give this help
   -i, --index                compress and create BGZF index
   -I, --index-name FILE      name of BGZF index file [file.gz.gzi]
   -k, --keep                 don't delete input files during operation
   -l, --compress-level INT   Compression level to use when compressing; 0 to 9, or -1 for default [-1]
   -r, --reindex              (re)index compressed file
   -s, --size INT             decompress INT bytes (uncompressed size)
   -t, --test                 test integrity of compressed file
       --binary               Don't align blocks with text lines
   -@, --threads INT          number of compression threads to use [1]