Burn subtitles into video.
Locally. In your browser.
Drop your video. Auto-generate captions with Whisper. Pick a style. Download. Nothing ever leaves your device — and hardware encoding burns a one-minute video in ~5 seconds. Free, forever.
Veed paywalls. Kapwing watermarks. Clideo uploads. BurnSub doesn't.
Drop video to caption + burn
MP4, MOV, WebM, MKV — up to 4K. Stays on your device.
Auto-captioning downloads the Whisper model once (~250 MB) — cached for instant reload.
Captions
Tip: First run downloads the Whisper model (~250 MB) — cached for instant reload. Long videos take longer; expect ~10–30 s per minute of audio on a modern GPU.
Why BurnSub vs the big subtitle tools?
| Feature | BurnSub | Veed.io | Kapwing | Clideo |
|---|---|---|---|---|
| No upload (privacy) | ✓ | ✗ | ✗ | ✗ |
| No watermark on free tier | ✓ | ✗ | ✗ | ✗ |
| No signup required | ✓ | ✗ | ✗ | ✗ |
| 4K input supported | ✓ | Pro only | Pro only | Pro only |
| File size limit | None | 250 MB | 250 MB | 500 MB |
| Encoding speed | ⚡ ~12× realtime, on-device | Cloud render queue | Cloud render queue | Cloud render queue |
| Price | $0 forever | $24/mo | $24/mo | $9/mo |
How it works
Drop video
MP4, MOV, WebM, MKV. Up to 4K. Stays in browser.
Auto-caption
Whisper-Turbo runs locally on your GPU via WebGPU.
Pick a style
30+ presets — TikTok, Reels, Shorts, MrBeast, Hormozi.
Burn + download
WebCodecs hardware encoding — ~12× faster than realtime. Saves directly.
Stop fighting paywalls.
Burn captions in seconds without uploading a single byte. No signup. Forever free.
Start Burning