Powered by OpenAI Whisper
Subtitles for any video
in 99+ languages
Upload a video or audio file. Our AI automatically generates accurate subtitles and closed captions — download as SRT, VTT, or TXT in minutes. Free to start.
▶
Hello, welcome to FlowSub!
your-video.mp4
SRTVTTTXT
How to generate subtitles automatically
Three steps to accurate subtitles
1
📁
Upload your video
Drop any video or audio file up to 500MB. MP4, MKV, MOV, AVI, WebM, MP3, WAV all supported.
2
🤖
AI transcribes
OpenAI Whisper analyzes the audio and generates accurate subtitles and closed captions with precise timestamps.
3
📥
Download subtitles
Get your subtitles as SRT, VTT, or plain TXT — ready to use in any video editor, player, or platform.
99+ Languages supported
Auto-detect or choose your language — Whisper handles the rest
🇺🇸English
🇪🇸Spanish
🇫🇷French
🇩🇪German
🇮🇹Italian
🇧🇷Portuguese
🇷🇺Russian
🇯🇵Japanese
🇰🇷Korean
🇨🇳Chinese
🇸🇦Arabic
🇮🇳Hindi
🇳🇱Dutch
🇵🇱Polish
🇹🇷Turkish
🇸🇪Swedish
🇩🇰Danish
🇫🇮Finnish
🇳🇴Norwegian
🇺🇦Ukrainian
🇨🇿Czech
🇷🇴Romanian
🇭🇺Hungarian
🇬🇷Greek
🇮🇱Hebrew
🇮🇩Indonesian
🇲🇾Malay
🇹🇭Thai
🇻🇳Vietnamese
+ 70 more
Simple, transparent pricing
Start free. No credit card required.
Pro
$12/mo
- ✓Unlimited minutes
- ✓SRT, VTT & TXT download
- ✓Subtitle translation
- ✓Video preview with captions
Frequently asked questions
Everything you need to know about FlowSub
How do I generate subtitles automatically?▼
Simply sign up for free, upload your video or audio file, and FlowSub will automatically generate accurate subtitles using OpenAI Whisper AI. The process usually takes 1–3 minutes. You can then download your subtitles in SRT, VTT, or TXT format.
Is FlowSub free to use?▼
Yes. The free plan includes 30 minutes of transcription per month with no credit card required. For unlimited transcription, subtitle translation, VTT format, and video preview, upgrade to Pro for $12/month or $99/year.
What video and audio formats are supported?▼
FlowSub supports MP4, MKV, MOV, AVI, WebM (video) and MP3, WAV, M4A, OGG (audio). Maximum file size is 500MB.
How accurate is AI subtitle generation?▼
FlowSub uses OpenAI Whisper, a state-of-the-art speech recognition model that achieves near human-level accuracy on clear audio. Accuracy depends on audio quality, speaker clarity, and background noise.
Can I get subtitles in multiple languages?▼
Yes. Whisper supports 99+ languages and auto-detects the spoken language. Pro users can also translate subtitles into another language using GPT-4o-mini — perfect for multilingual audiences.
What subtitle formats does FlowSub export?▼
FlowSub exports SRT (most compatible), VTT (web standard for HTML5 video, Pro only), and TXT (plain text transcript). All formats are included with every transcription.
Start generating subtitles today
No credit card required. 30 minutes free every month.
Generate subtitles free