TOOL · CAPTION MAKER · UPDATED MAY 2
Captions that don't look stock.
getvivix auto-captions any video using OpenAI Whisper, then exports a 9:16 vertical MP4 with burned-in captions in 17 viral templates. 95–98% accurate on clean audio, 90+ languages, browser-only.
17 BUILT-IN TEMPLATES
EVERY TEMPLATE EDITABLE · FONT · COLOR · WEIGHT · POSITION · ANIMATION · OUTLINE
HOW IT WORKS
MP4 up to 2 hours. Stays in your private workspace — nothing is shared.
Whisper transcribes the full timeline. For long content, our LLM picks the most viral segments automatically.
17 caption styles, all customizable. Reframe to 9:16, 1:1, 16:9, or 4:5. Export in MP4, ready to post.
What people build
- Turn podcasts into TikTok-ready clips with captions
- Add captions to talking-head videos for accessibility
- Repurpose YouTube videos into Reels and Shorts
- Caption webinars and interviews for higher retention
- Subtitle behind-the-scenes content for IG Stories
- Localize videos by editing transcripts before export
FREQUENTLY ASKED
How accurate are the captions?+−
Captions are generated by Whisper, OpenAI's speech-to-text model. Word-level accuracy is 95%+ on clean English audio. Heavy accents, music overlay, and background noise drop accuracy slightly. You can edit any caption inline before exporting.
Does it work in my browser?+−
Yes. The full Caption Studio runs in-browser using ffmpeg.wasm. No plugin, no download. Your video is uploaded to your private getvivix workspace, captioned, and you export the result directly.
How does the smart clip picking work?+−
For long-form content like podcasts or interviews, an LLM ranks each segment on hook strength, punchline density, and emotional arc, then picks the top 5-10 viral moments. Each pick is cut, reframed to 9:16, captioned, and rendered in parallel.
Can I customize caption styles?+−
Yes. 17 templates ship out of the box (TikTok-style, Karaoke, Subtle, Bold, Subtitle Bar, etc.). Each is fully editable — change the font, color, weight, position, animation, and outline.
What aspect ratios are supported?+−
Source video can be any aspect ratio. Caption Studio exports to 9:16 (TikTok / Reels / Shorts), 1:1 (Instagram feed), 16:9 (YouTube / web), and 4:5 (Instagram portrait).
Is it free?+−
Free signup includes 1 clip credit (full caption + export of 1 short). Paid plans include 40-400 clip credits per month depending on tier. Each "clip credit" pays for one captioned export.
Is this AI caption generator really free, or is it a trial?+−
It's a real free tier, not a 7-day trial that locks you out. Signup gives you 1 clip credit for a full captioned export plus 20 normal credits, and the main getvivix studio drops 30 credits a day. No card needed to start. The exact credit cost is shown before every export, so you always know what a clip will spend before you click.
Can I auto caption a video for free with no watermark?+−
Yes. Exports from Caption Studio carry no getvivix watermark on any tier, including the free clip credit. You upload a video, Whisper transcribes it, you pick one of 17 templates, and the 9:16 MP4 you export is clean. Commercial use of what you make is covered on any paid plan.
How do I add subtitles to a video with AI?+−
Upload your file (MP4, MOV, WAV, M4A, or WebM), and getvivix runs OpenAI Whisper to transcribe it into time-synced subtitles automatically. Edit any line inline, choose a caption style, then export burned-in subtitles to 9:16, 1:1, 16:9, or 4:5. The whole thing runs in your browser, no plugin or download.
Do I have to caption videos one tool at a time?+−
No. Caption Studio is one tool inside getvivix, which hosts 100+ image, video, and audio models under a single subscription. You can caption a clip, then generate a thumbnail, voiceover, or B-roll without juggling separate apps or logins, and every action shows its credit cost up front.