JPEGOPTIM(1) General Commands Manual JPEGOPTIM(1) (NAME) jpegoptim - / JPEG/JFIF. (SYNOPSIS) jpegoptim [ ] [ ] (DESCRIPTION) jpegoptim / jpeg . (lossless) (Huffman) << >> (lossy) . ! jpegoptim ( ) -d . ( ). (hard link) ( link(2) ) . (OPTIONS) POSIX GNU . POSIX ``-'', GNU ``--'' . jpegoptim : -d, --dest= ( ). . . -f, --force . -h, --help . -m, --max= ( ). . : 0 - 100 -n, --noaction . -S, --size= ( ). (1 - n) (1% - 99%) . -T, --threshold= (%) . : 0 - 100 -w, --workers= ( 1 ). -b, --csv CSV. -o, --overwrite ( -d). -p, --preserve (modification times). -P, --preserve-perms (/) . ( ). .jpegoptim.bak . ! jpegoptim (root) jpegoptim root . -q, --quiet . -r, --retry . . ! -m (--max) -S (--size) . -t, --totals . -v, --verbose ( ). --auto-mode (progressive) (non-progressive) . ( ) . --all-normal . --force JPEG . --all-progressive . --force () . --all-arith (Arithmetic Coding). jpegoptim Arithmetic Coding . --all-huffman (). jpegoptim Arithmetic Coding . --nofix (decompression) . jpegoptim . JPEG () <<>> . jpegoptim . --save-extra JPEG ( ). JPEG JPEG . ! JPEG (stdin) . --stdout . ( JPEG ). --stdin ( --stdout ). . () . '-' . --files-stdin . --files-from= ..SH " (METADATA OPTIONS)" jpegoptim ( JPEG) ( ) . : - EXIF - IPTC - ICC - XMP - COM ( Comment JPEG) JFIF ( libjpeg) ( ). Adobe (colorspace) libjpeg ( ) . libjpeg . Adobe --keep-adobe . --strip-* . : --strip-icc --strip-xmp --strip-com --strip-all --keep-* . : --strip-all --keep-exif --keep-iptc () : -s, --strip-all . (! Comment Exif/IPTC/PhotoShop/ICC/XMP ). JPEG (JFIF Adobe APP14) libjpeg . --strip-none, --keep-all <<>> . JFIF (APP0) Adobe (APP14) libjpeg . ! --strip-* --keep-* . --strip-com Comment (COM) . --strip-exif EXIF . --strip-iptc IPTC / Adobe Photoshop (APP13) . --strip-icc ICC . --strip-xmp XMP . --strip-jfif JFIF . --strip-jfxx JFXX (JFIF Extensions) . --strip-adobe Adobe . --keep-com Comment (COM) . --keep-exif EXIF . --keep-iptc IPTC / Adobe Photoshop (APP13) . --keep-icc ICC . --keep-xmp XMP . --keep-jfif JFIF . --keep-jfxx JFXX (JFIF Extensions) . --keep-adobe Adobe ..SH " (BUGS)" --size . jpegoptim . (SEE ALSO) jpeginfo(1) (AUTHORS) Timo Kokkonen (COPYRIGHT) Copyright (C) 1996-2025 Timo Kokkonen << >> (GNU General Public License) << >> (Free Software Foundation) ( ) / . << >> << >>. << >> . << >> : Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. 4th Berkeley Distribution 28 Jan 2025 JPEGOPTIM(1)