| What it does | Add accurate, styled captions to any video in about a minute
| Free AI video upscaler that runs in your browser with no watermark, signup, or upload required
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| Pricing model | Freemium
| Free
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| Pricing | Free: unlimited SRT/VTT/TXT downloads, 30 transcription minutes daily, videos up to 10 minutes, 720p export with watermark. 7-day pass: $7.99 one-time for 120 transcription minutes, up to 30-minute videos, 1080p no watermark, AI translation, custom fonts. Pro: $14/month or $96/year (save 43%), 300 t
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| Key features | - Word-by-word animated captions with synchronized timing
- 16 pre-made caption styles including Bold Pop, Karaoke, Highlight Box and Neon
- Customizable fonts, colors, size and position
- Support for 30+ languages
- Export as SRT, VTT, TXT subtitle files
- MP4 video export with burned-in captions
- Editable captions with word-by-word control
- AI translation into 27 languages
- Upload custom fonts (TTF, OTF, WOFF, WOFF2)
- Browser-based processing with no software installation
| - 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
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| What makes it different | - All processing happens in your browser; videos never upload to servers
- Free subtitle file downloads with no watermark; video export watermark only on free plan
- Works entirely in browser with no account required for subtitle downloads
- Automatic punctuation and accurate captions for clear speech with full editing control
- Support for multiple video and audio formats in one tool
| - 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
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 1 ▲ +1 (up) since last check | 2 ▲ +1 (up) since last check |
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| Trust Flow (Majestic) | 1 | 11 |
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| Citation Flow (Majestic) | 20 | 19 |
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| Referring domains (Majestic) | 7 | 3 |
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Caption Generator
4K Video Upscaler