The 1080p command.
Cap the longest side at 1080 pixels — also 720p and 480p.
clip.movclip.1080p.mov
Works on: Video and images · The command disappears once the job is done · Original backed up first
A 4K screen recording is four times the pixels anyone will ever see of it in Slack. The resolution commands — 1080p, 720p, 480p — cap the longest side and re-encode, which is usually the single biggest size win available with zero visible cost at viewing size.
On images the same tokens cap pixel dimensions, which is what most 'photo too large' upload errors actually want.
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More commands
25mb
Shrink any video or image to ≤ N megabytes — any whole number works.
small
A balanced compression preset — noticeably smaller, still looks great.
tiny
Aggressive compression for when size beats quality.
720p
Cap the longest side at 720 pixels — the sharing sweet spot.
480p
Cap the longest side at 480 pixels — maximum shrink for previews.
50%
Scale an image proportionally — also 25%.