v1.5.1

Add --timeout flag to prevent a long-running process from continuing indefinitely.

v1.5.0

• Support for zopflipng

v1.4.0

• advpng, pngcrush, and jpegrescan are now ignored by default when made redundant by MozJPEG or oxipng.
• New --overkill flag to continue using the above anyway.
• Debian package now treats compression apps as suggestions rather than dependencies.

v1.3.2

oxipng now respects --multithreaded runtime option.

v1.3.1

Replace optipng with oxipng, add flags for individually disabling compression binaries, --max-age and --min-age flags.

v1.2.0

New options: --skip-jpeg, --skip-png, --max-size, --min-size, --dry-run
Improved STDOUT, performance

v1.1.2

Fix always-colored STDOUT.

v1.1.1

Sort files before compressing.

v1.1.0

Add help and colorization flags, jpegtran support.

v1.0.2

This sorts files in -d mode prior to compression to make progress more apparent.