Ai Video Captions - CapSub

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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SUBSCRIPTION
Unlock full access with 1-month or 1-week plans (free trials for eligible users), or a one-time Lifetime purchase.
Payment is charged to your Apple Account at purchase confirmation, or when a free trial ends.
Cancel at least 24 hours before your trial ends to avoid charges.
Subscriptions renew automatically unless cancelled at least 24 hours before the current period ends.
Manage or cancel subscriptions in your Apple Account settings. Prices are shown before purchase.
Lifetime is a one-time purchase with no automatic renewal and does not cancel an existing subscription. Restore purchases in the app using the same Apple Account.
Pro AI transcription allowance: up to 300 minutes per month.

Privacy Policy: https://autocaption-app-a0519.web.app/privacy.html
Terms of Use: https://autocaption-app-a0519.web.app/terms.html