Ephemeral processing · files auto-delete after 2 hours
Creator-owned content only
Ephemeral processing · files auto-delete after 2 hours
Creator-owned content only
Pad 40–200px on chosen edges with Safe Zone Margin or Caption Safe Margins so burned captions and hooks stay clear of Shorts, Reels, and TikTok UI overlays before you cross-post.
Updated
Tools in this guide
Shorts, Reels, and TikTok draw controls over the bottom and side of 9:16. End cards, usernames burned into corners, and SRT burns placed too low disappear on phone playback even when the desktop preview looks fine.
Open Safe Zone Margin for general framing (40–200px on selected edges). Open Caption Safe Margins when the problem is burned text near the bottom third. Keep both URLs — they are deepen-in-place siblings, not duplicates to merge.
Finish the edit in CapCut. If readiness fails on aspect/loudness/length, run the pack first. If the 9:16 master already exists but captions collide with chrome, run safe-zone padding next. Specs for the vertical baseline live on vertical export settings for Shorts, Reels & TikTok.
After download, scrub the MP4 on a phone before upload. Confirm hooks and CTAs clear the bottom UI. Adjust margin_px upward only when text still collides — oversized pads shrink the usable picture.
FAQ
A safe zone is the inner frame area that stays visible under platform UI — username, buttons, captions, and progress chrome. Content pushed into the outer 40–200px band is often covered on mobile.
Safe Zone Margin pads the edges you choose for general key visuals. Caption Safe Margins defaults to bottom-heavy padding for burned captions and CTAs. Both stay as separate indexed tools; pick the one that matches the job.
Pad when burned text or hooks already exist on the master and risk sitting under chrome. Run a Shorts or Reels/TikTok pack when you still need 9:16, −11 LUFS, and length trim — packs reshape the canvas; safe-zone tools preserve legibility inside it.
No. Safe-zone and caption-safe tools add black (or pad) margins and re-encode the frame. Loudness and length still come from Loudness Normalize tools or Shorts/Reels packs.
Keep reading
Open Safe Zone Margin and run the steps from this guide.
