AI caption and subtitle generator that adds captions to videos in seconds with no watermark
Identify insect sounds by recording or uploading audio in your browser
Stage
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Founded
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Based in
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Pricing model
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Paid
Pricing
Free: 30 minutes of captions per month, 1080p MP4 export up to 3 minutes, 8 caption styles, SRT/VTT/TXT downloads up to 30 minutes, free translation into 100+ languages. Pro: $6.99/month (limited-time price, normally $9.99) or $59/year, unlimited captions on videos up to 90 minutes, all 22 caption s
Starter pack: 3 ID credits for $2.99 USD; Field pack: 10 ID credits for $6.99 USD. No subscription; credits are purchased once and used as needed.
Key features
Automatic speech transcription in 100 languages with automatic language detection
SRT, VTT and TXT subtitle file downloads
Free translation into 100+ languages
Copy caption style from screenshot functionality
Bilingual captions showing two languages simultaneously on Pro
Video processing entirely in browser with audio-only server transmission for privacy
Word-level timing synchronization for precise caption timing
Record or upload audio directly in browser
Free signal quality check without identification
AI-powered identification with confidence score
Support for WAV, MP3, M4A, and OGG formats
Optional location and time context for better matching
Private results with automatic deletion after 7 days
Save results with email account across devices
Reference sound library for comparison
Listening guides for common night sounds
One-time credit purchases without subscription
What makes it different
Fastest among 10 tested caption tools, 6.7× faster than CapCut and 4.7× faster than VEED
Highest accuracy with 5.7% word error rate in October 2026 accuracy test of 8 caption tools
Video stays entirely private with only audio sent for transcription
Free signal check before paying for full identification
Pay per identification with no subscription required
AI provides explanation of audible features, not just a species name
Specialized guides for distinguishing similar sounds like crickets, katydids, and cicadas
Educational focus with privacy protection and no safety claims
Captions Generator
Insect Sound ID