Submagic

What It Does

Submagic takes a raw short-form video (TikTok, Reels, Shorts) and automatically adds animated, styled captions, relevant B-roll and emoji overlays, sound effects tied to speech emphasis, and jump-cut style edits designed to boost watch-through rate — the kind of editing top short-form creators do manually.

Key Features

• Animated captions: Auto-transcribes speech and applies trending caption styles (word-by-word highlight, karaoke-style, etc.).
• Auto B-roll: Inserts relevant stock or AI-generated B-roll clips matched to what's being said.
• Sound effects and emojis: Automatically times sound effects and emoji overlays to speech for a punchier edit.
• Silence and filler removal: Trims dead air and filler words automatically.
• Multi-language support: Caption generation and translation across numerous languages.

Who It's For

Short-form content creators, social media managers, and podcasters who repurpose long content into TikTok/Reels/Shorts clips and want the polished editing style of top creators without manual editing time.

Practical Tips

• Review auto-selected B-roll before publishing — it's usually good but occasionally mismatched to context.
• Caption style presets can be customized to match a creator's existing brand look.

Limitations

Works best on speech-driven talking-head content; less useful for content without clear narration. Heavier edits (B-roll, sound effects) require a paid plan.