| What it does | Free AI video upscaler that runs in your browser with no watermark, signup, or upload required
| Free, open-source video captions you control
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| Stage | Not given
| Startup
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| Founded | Not given
| 2026
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| Based in | Not given
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| Pricing model | Free
| Freemium
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| Pricing | Not given
| Free app (1080p at 30 fps), Pro one-time purchase 14.99 €, self-hosting free
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| Key features | - Runs entirely in browser on WebGPU with no upload required
- Upscale to 1080p, 2K or 4K resolution
- No signup, watermark or account needed
- Supports videos of any length with progress saved
- Batch upscale up to 200 videos at once on computer
- Opens MP4, MOV, MKV, WebM, 3GP and converts older formats
- Quality tiers from 2× passes to 4× restoration
- Deinterlace interlaced video during conversion
- Download results as MP4, MOV, MKV or WebM with audio
- Works on phones with Chrome, Edge, Samsung Internet or Safari
| - Transcription with Whisper, Parakeet, or Apple Speech
- Word-by-word animated captions
- Caption styling and correction
- Export as MP4, WebM, ProRes, SRT, VTT or JSON
- iPhone app with on-device transcription
- Self-hosted Docker deployment
- HTTP API for scripts and pipelines
- Integration with Claude, Cursor and MCP clients
- Support for 13 interface languages
- GPU acceleration optional for faster transcription
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| What makes it different | - Runs entirely on your device—no file uploads to servers or accounts required
- Measures your device's graphics performance to give accurate time estimates
- Supports unlimited video length with progress saved automatically
- Batch process up to 200 videos with one set of settings
- Adapts quality settings based on content type and compression level
| - Open source with Rust engine shared across browser, app and server
- No uploads: iPhone app transcribes on device, self-hosted keeps videos local
- Free with one-time Pro purchase, no subscription required
- Run on your own server with Docker, no dependency on external services
- Agent integration for video captioning from Claude and other AI tools
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 2 ▲ +1 (up) since last check | Not checked yet ● no change since last check |
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| Trust Flow (Majestic) | 11 | 0 |
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| Citation Flow (Majestic) | 19 | 0 |
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| Referring domains (Majestic) | 3 | 0 |
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4K Video Upscaler
OpenCaptions