Subtitle Generator CaptionFlow

Add captions to any video instantly. 60+ languages, custom styles, word-by-word highlighting — all on-device.

Add captions to any video in seconds. CaptionFlow uses on-device speech recognition to automatically transcribe your videos with perfectly timed, word-by-word captions — no internet required.

Whether you're a content creator, educator, or just want accessible videos, CaptionFlow gives you professional captions with full creative control.

KEY FEATURES

• Instant Auto-Captioning — Import a video, tap one button, and get accurate captions with precise word-level timing.

• Word-by-Word Highlighting — Each word lights up as it's spoken, keeping viewers engaged and making your content pop on social media.

• Full Style Control — Choose from premium fonts, adjust colors, size, position, background, and stroke. Make captions match your brand.

• 60+ Languages — Caption videos in English, Spanish, French, German, Japanese, Arabic, and many more. On-device recognition means your audio never leaves your phone.

• Smooth Animations — Pick from 8 caption animations including Pop, Fade, Slide Up, Drop, Glow, and Shake. Text that moves grabs attention.

• Pixel-Perfect Export — Export captioned videos at full quality, ready to post on TikTok, Instagram, YouTube, or any platform.

• Split & Merge — Fine-tune your captions by splitting at any word or merging lines together.

• Per-Caption Styling — Override the global style on any individual caption for emphasis or variety.

• Save to Photos — One tap to save your finished video directly to your photo library.

COMPLETELY PRIVATE

All speech recognition and video processing happens entirely on your device. No data is uploaded, no accounts required, no subscriptions. Just open the app and start captioning.

Perfect for:

• Social media creators adding captions to Reels, TikToks, and Shorts
• Educators making video lessons accessible
• Anyone who wants better, more engaging video content