Zipic

Native macOS image compression, 100% local. Drive it via the zipic CLI; URL Scheme is a fallback only when the CLI binary isn't installed.

Compress

zipic compress --json [flags] <files-or-dirs>...

--json is required — it surfaces per-file output_bytes / saved_pct and lets you map exit code to the failure mode. Pass directories directly; Zipic walks them recursively.