Animated captions for your shorts, made in your browser
Drop a Reel, TikTok or Short: Whisper writes word-by-word captions on your device, the line editor fixes any word (timings re-spread on their own), you pick a style and position, and the captions are burned into an MP4 with an SRT alongside. Nothing is uploaded and there are no per-video credits.
Free vs Pro
| Free | Pro | |
|---|---|---|
| Video length | up to 60 s | up to 30 min |
| Resolution | 720p | 1080p |
| Styles | Bold Pop | all 4 |
| 9:16 crop | – | yes |
| Corner mark | small mark | none |
| MP4 + SRT export | yes | yes |
Source: Subtwine plans, 1 Oct 2026.
Subtwine vs the alternatives
Published prices, each checked on the date shown; prices change, so confirm on each site.
| Product | Price | Free | Checked |
|---|---|---|---|
| Subtwine Pro | $9 for 30 days; $12/month; $96/year (no per-video credits) | Up to 60 s at 720p, 1 style | live |
| Submagic | $12/$23/$41 per member per month billed yearly; 45/120/300 credits | not checked today | 2026-10-01 |
| Captions | $24.99/month; $69.99/month | not checked today | 2026-10-01 |
| VEED | Creator $147/year, Pro $265/year (as shown) | free plan with watermark (not checked today) | 2026-10-01 |
Why teams pick Subtwine
- No credits: caption as many videos as you like on Pro.
- Your footage stays on your device; nothing is uploaded.
- Fix any word in the line editor before you burn, and get an SRT for YouTube and LinkedIn.
- The $9 pass covers a month of posting with no subscription.
How it works
- Drop your clip; Whisper transcribes it on your device.
- Fix any word, pick a style and position.
- Download the captioned MP4 and the SRT.
FAQ
Why is the first run slower?
The speech model downloads once (then it is cached); speed depends on your computer. Browsers with WebGPU are fastest.
Why not Submagic or Captions?
They offer more effects and editing features and run in the cloud; Submagic counts videos against monthly credits. Subtwine focuses on clean animated captions, with no credits and no upload, from $9.
Which languages?
Pick Fast or Accurate for English, or the Any language model for other languages. You can correct any word before burning.