Submagic

Submagic is a web editor for short-form video that auto-generates animated captions in 123 languages, cuts long footage into highlight clips, removes silences, adds B-roll and schedules posts to TikTok, Reels and Shorts. It also offers AI avatars, team workspaces and an API.

Submagic is a browser-based video editor built around short-form output. The core job is captioning: the tool transcribes your footage and lays animated, styled captions over it, with support for 123 languages at a claimed 99 percent accuracy. From there it handles the surrounding chores of shorts production, including silence removal, automatic B-roll insertion and highlight detection that slices a long recording into several publishable clips. The workflow is deliberately shallow. You upload a file or paste a YouTube link, the AI transcribes and reformats the video for vertical platforms, and you correct the result by editing text directly rather than nudging timelines. Text-based editing is the main differentiator here: fixing a misspoken line means changing a word, not re-cutting audio. Exports are handled for TikTok, Reels and Shorts, with quality up to 4K at 60fps, and scheduling plus direct publishing sit inside the same editor. Beyond captions, Submagic bundles AI avatars for producing clips without filming, a shared workspace for teams that need review and brand consistency, and a public API for automating the editing pipeline. The site positions the product for creators repurposing podcasts and interviews, agencies producing client work at volume, media companies mining long-form libraries, and marketing or advertising teams pushing product shorts. It reports more than 4 million business users. The obvious comparison is with dedicated transcription tools and with manual editing in a full NLE. Submagic trades deep timeline control for speed on a narrow format, so it suits people who publish shorts constantly and want the repetitive steps gone. Anyone needing fine compositing, multicam work or precise audio mixing will still finish in a traditional editor. Pricing tiers are not published on the homepage, so check the app before committing.