Submagic

Submagic claims 99% caption accuracy across 48 languages – roughly 3 errors on a 300-word video. Some reviews report 98.8% and cite 100+ language support on the speech-to-text engine.

One click and the AI inserts contextually relevant B-roll, GIFs, and stock images from its library based on what the speaker is saying, pulling from Storyblocks.

The core editor works on a short video you upload. Magic Clips is a separate add-on (around +$12/month annual) that analyzes long-form content – podcasts, webinars, interviews – extracts high-engagement moments, scores them, and auto-frames vertical.

Transcript-based. Delete a sentence from the transcript and the matching footage disappears; fix a caption word and it updates on screen.

Applies animated captions, removes silences and filler words, inserts Storyblocks B-roll, adds cinematic zooms at key moments, and generates a hook title – roughly 2–5 minutes for a typical 3-minute video. Each toggle works independently.

MP4 or MOV up to 3GB via drag-and-drop, phone QR scan, or Google Drive import. With Magic Clips you can paste a YouTube URL directly, no download needed.

Upload custom fonts, brand colors, and your logo, and every caption you generate uses that identity automatically. Agencies can save per-client brand kits, with API access.

Export at 1080p, 2K, or 4K depending on plan; you can also download the SRT, export subtitles only, copy the subtitles, or add keywords to the dictionary.

Magic Clips output is described as solid but not exceptional – dedicated tools like Opus Clip offer more editorial control over which moments get picked. Submagic’s advantage is that you never leave the workflow. Auto-zoom and sound effects need less correction than B-roll.