1. Capsai Auto Subtitle Generator
   Features: Real-time subtitle generation in Hindi, English, Hinglish; downloadable SRT/VTT; in-browser editing
   Pros: Very fast processing; high accuracy for Indian languages; free unlimited usage
   Cons: Occasional minor timing adjustments needed
   Link: https://capsai.co/auto-subtitle-generator
   
   

1. WebCaptioner
   Features: Browser-based live captioning; supports 35+ languages; customizable text styles
   Pros: No installation; very low latency; works on any microphone input
   Cons: Requires constant internet; limited export formats
   
   

1. Google Live Transcribe
   Features: Android app; live speech-to-text for 80+ languages; adjustable font sizes
   Pros: Integrates with Android accessibility; offline mode for some languages
   Cons: Not designed for video file uploads; limited editing
   
   

1. Microsoft Translator App
   Features: Real-time live captions and translation; supports conversations in 70+ languages; works on calls
   Pros: Cross-platform mobile support; integrates with PowerPoint and Teams
   Cons: No direct video file input; transcript export limited to text
   
   

1. Kapwing Studio
   Features: Auto-generate subtitles from video; translate into 60+ languages; timeline editor
   Pros: Easy drag-and-drop interface; collaborative features; batch processing
   Cons: Free plan limits export resolution to 720p
   
   

1. Subtitle Bee
   Features: AI-powered transcription; supports 20+ languages; burn-in and SRT export
   Pros: High accuracy; simple interface; basic styling options
   Cons: Free tier limited to 20 minutes of video per month
   
   

1. Otter.ai
   Features: Automatic transcription; collaborative notes; speaker identification
   Pros: Good accuracy for clear audio; integrates with Zoom and Google Meet
   Cons: Subtitle formatting requires manual SRT conversion
   
   

1. Happy Scribe
   Features: Auto-subtitle and translation; subtitle styling; multi-format exports
   Pros: Intuitive editor; supports chapters; integrates with Dropbox and Google Drive
   Cons: Free tier offers only 10 minutes of transcription
   
   

1. Aegisub (with AI plugin)
   Features: Advanced subtitle editor; AI-assisted timing suggestions; waveform view
   Pros: Fine-grained control over timing and styling; open-source
   Cons: Steeper learning curve; manual installation of AI plugin required
   
   

1. VEED.io
   Features: One-click subtitle generation; translation; subtitle styling presets
   Pros: Browser-based; simple UI; direct social media sharing
   Cons: Free plan adds watermark on video exports
   
   

each of these tools offers a no-cost way to add accurate subtitles, with varying limits on usage or export options. choose based on your language needs, editing preferences, and monthly volume.