How this free YouTube Shorts scheduler works
Upload a vertical video under 60 seconds, draft a Short title and description, and set a publish time. YouTube automatically classifies 9:16 videos under 60 seconds as Shorts when they upload.
Postmixr handles resumable upload and publishAt scheduling so Shorts go live without opening YouTube Studio.
YouTube Shorts video specs
Export at 1080×1920 (9:16 vertical) in MP4 or MOV. Keep hooks in the first 2 seconds — Shorts viewers decide quickly whether to keep watching.
- Titles under 60 characters avoid truncation in the mobile Shorts feed.
- Use 3–8 niche tags instead of stuffing generic hashtags.
- Need long-form? Switch the video type dropdown to Long-form video.
Why schedule YouTube Shorts in advance
Batch-record Shorts on one day, schedule them across the week, and maintain a consistent posting cadence. Timezone-aware scheduling means Shorts publish at peak hours even when you are offline.