Submagic

Submagic is an AI auto-captioning tool built specifically for short-form video, TikTok, Instagram Reels, and YouTube Shorts, with an emphasis on aesthetically appealing, animated subtitle styles that match the visual grammar of viral short-form content rather than producing plain static captions. The platform generates accurate multilingual captions from uploaded video audio, then applies styling options including animated words (each word highlights as it's spoken), emoji insertion at contextually relevant moments, and custom font, color, and background combinations. These visual treatments are designed to increase view completion rates on platforms where captions are often the primary engagement driver for silent viewing. Submagic also auto-generates a short-form description and relevant hashtags from the video content, reducing the post-production metadata work.

The B-roll generation feature suggests and inserts relevant stock video clips into specific segments of a talking-head video. Individual plans start at $20/month for up to 30 videos. Teams and agencies access higher volume tiers. Submagic is particularly popular with video marketing agencies and social media managers who produce high volumes of short-form content and need both speed and visual polish in the captioning step.