How to Add AI Captions to Videos Automatically (Step-by-Step)

Over 85% of social media videos are watched without sound, making captions absolutely critical for engagement. Videos with captions see 40% more watch time on average across all platforms.

AI-powered captioning tools have made adding subtitles effortless. Instead of manually typing and timing each word, AI transcribes your audio with near-perfect accuracy and syncs captions to the exact millisecond.

Beyond accessibility, styled captions have become a design element. Animated, color-highlighted, and karaoke-style captions are now expected by audiences on TikTok, Instagram Reels, and YouTube Shorts.

Step 1: Upload or create your video. Start with an existing video file or create a new one with FluxNote. The AI processes the audio track for transcription.

Step 2: Let AI transcribe the audio. FluxNote uses advanced speech recognition to transcribe your video with word-level timing accuracy.

Step 3: Choose a caption style. Select from 25+ styles including karaoke, bold pop-up, highlighted, neon glow, and more.

Step 4: Customize appearance. Adjust font, color, size, position, and animation to match your brand.

Step 5: Export with embedded captions. Export your video with captions burned in for social media, or as a separate SRT file for YouTube.

- Use word-by-word highlighting for short-form content — it keeps viewers reading along
- Position captions in the center or lower third of the screen for readability
- Choose high-contrast colors — white text with a dark outline works on any background
- Match caption style to your content tone — bold for motivation, clean for educational, fun for entertainment
- Review auto-transcriptions for any misheard words before exporting

- Using tiny font sizes — captions need to be readable on mobile screens
- Placing captions over busy areas — keep text in areas with consistent backgrounds
- Skipping the review step — AI transcription is 95%+ accurate but still needs a quick check
- Using the same style for everything — match caption style to content type and platform
- Forgetting about safe zones — TikTok and Reels have UI overlays that can cover captions