CapSub adds captions to your videos automatically — so your shorts get watched, with or without sound.
Import any video and CapSub's AI transcribes every word into perfectly-timed subtitles you can style, edit, and export in seconds. No timelines, no manual typing, no watermark.
AUTO CAPTIONS IN SECONDS
• AI speech-to-text with word-level timing
• Smart caption segments that follow natural speech
• Tap any line to fix text or timing — you're always in control
VIRAL CAPTION STYLES
• One-tap presets: TikTok, Bold Yellow, Pop, Neon, Boxed & more
• Word-by-word, karaoke, typewriter and fade-in caption motion
• Custom fonts, colors, stroke and background
• Put captions where you want them — top, center or bottom
SUBTITLES IN 90+ LANGUAGES
• Transcribe speech in 90+ languages and dialects
• Smart language detection that respects how you actually speak — even when you mix languages mid-sentence
BUILT-IN TELEPROMPTER
• Write or AI-generate your script, and save it to your script library
• The script scrolls over the camera while you record — read while keeping eye contact
• Record, auto-caption, and post. Done.
SHARE EVERYWHERE
• Export in full quality with captions burned in
• Saved to Photos, ready for TikTok, Instagram Reels & YouTube Shorts
• Export SRT / VTT subtitle files or copy the full transcript
PRIVATE & SECURE
Your videos stay yours. Audio is processed securely just to create your captions — never sold, never shared.
Whether you're a creator posting daily, a marketer localizing ads, or a teacher making lessons accessible — CapSub makes every video easier to watch, everywhere.
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CapSub Pro (optional subscription)
• Weekly with a 3-day free trial, or Annual
• Unlocks unlimited AI transcription and AI script generation
Payment is charged to your Apple ID account. Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period. Manage or cancel anytime in your App Store settings.
Privacy Policy: https://autocaption-app-a0519.web.app/privacy.html
Terms of Use: https://autocaption-app-a0519.web.app/terms.html
