Auto Subtitle Generator
Upload a video or audio file and get an SRT or VTT subtitle file in seconds. Powered by AWS Transcribe.
Drag & drop your video or audio here
MP4, MOV, WebM, MP3, WAV, M4A — up to 500 MB
🔒 Your file is uploaded directly to S3 and deleted immediately after processing.
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About Auto Subtitle Generator
Generate SRT and VTT subtitle files from any video or audio using AI-powered speech recognition via AWS Transcribe. Upload MP4, MOV, WebM, MP3, WAV, or M4A, select the spoken language, and download a ready-to-use caption file in seconds. Supports 12 languages.
How It Works
- Upload your video or audio file (MP4, MOV, WebM, MP3, WAV, M4A)
- Select the spoken language from the dropdown
- Click Generate Subtitles and wait 20–60 seconds
- Preview the captions, then download as SRT or VTT
Key Features
- AI speech recognition via AWS Transcribe
- Supports MP4, MOV, WebM, MP3, WAV, M4A
- 12 languages: EN, FR, ES, DE, IT, PT, JA, KO, ZH, AR, HI
- Download as SRT (for video editors) or VTT (for web)
- Preview captions before downloading
- Direct S3 upload — bypasses file size limits
- No signup required
Frequently Asked Questions
- How accurate are the automatically generated subtitles?
- AWS Transcribe achieves 90–95% accuracy on clear speech in standard accents. Accuracy decreases with heavy accents, background noise, multiple overlapping speakers, or low-quality audio. For best results use a clean audio track recorded in a quiet environment.
- What is the difference between SRT and VTT formats?
- SRT (SubRip Text) is the most widely supported subtitle format — it works with VLC, Premiere Pro, DaVinci Resolve, YouTube, and most video players. VTT (WebVTT) is designed for the web and is used natively in HTML5 video players. Both contain the same timing and text data.
- How long does it take to generate subtitles?
- Processing time depends on video length. A 5-minute video typically takes 20–40 seconds. A 60-minute video may take 2–4 minutes. The tool polls AWS Transcribe every 4 seconds and shows you the result as soon as it's ready.
- Is my video stored after processing?
- No. Your file is uploaded directly to a private S3 bucket, processed by AWS Transcribe, and then deleted immediately once the subtitle file is generated. We never view, log, or retain your video or audio content.