Ephemeral processing · files auto-delete after 2 hours
Creator-owned content only
Ephemeral processing · files auto-delete after 2 hours
Creator-owned content only
How YouTube Shorts, Instagram Reels, and TikTok length windows differ from RepostClip’s hard 15–90s Shorts/Reels pack trim — and when to keep CapCut length vs let the pack cut.
Updated
Tools in this guide
Short-form cross-post prep needs a bounded deliverable. The 15–90s control keeps one CPU job honest on a 50 MB ceiling while matching how creators usually cut swipe opens. It is not a substitute for CapCut storytelling edits.
Apps may accept longer vertical uploads than 90 seconds. Treat pack trim as “make a short-form file,” not “the platform’s legal maximum.” When readiness fails only on duration for a short destination, pack. When you intentionally publish a longer Reel, keep CapCut length and use Fit to Aspect or loudness-only tools instead.
15–30s suits single-hook demos. 45–60s suits tutorial opens. 90s is the pack ceiling for denser stories that still behave like short-form. Measure retention in each app after upload — the pack only enforces the file length.
Auto Intro/Outro Trim removes detected dead air at edges. Silence Trim can cut mid gaps. Then run Shorts or Reels pack so length, canvas, and ≈ −11 LUFS move together.
FAQ
Shorts Upload Pack and Reels / TikTok Pack hard-trim output to a creator-chosen max between 15 and 90 seconds (default in the middle of that band). That is a product window for short-form publish prep — not a claim that every platform rejects longer uploads.
Platform eligibility windows change and often allow longer uploads than a tight short-form edit. RepostClip packs still hard-trim to 15–90s so one owned master becomes a deliberate short-form deliverable. For longer vertical stories, keep CapCut length and skip the pack length job.
Cut the story in CapCut when the hook and ending must land on exact frames. Use the pack’s 15–90s control when the cut is already good and you only need a hard ceiling with 9:16 and ≈ −11 LUFS in one job.
Highlight Clipper picks a short window from a longer master before canvas/loudness. Pack length trim applies after (or with) 9:16 and loudness on the Shorts or Reels landing. Use Highlight when the interesting segment is buried; use pack trim when the whole clip is already the story.
No. Pinterest Upload Pack allows 15–180s for tall 2:3 Idea Pin–style video. Shorts and Reels packs stay on the 15–90s short-form band.
Keep reading
Open Shorts Upload Pack and run the steps from this guide.
