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AI Caption Generator

Add Captions to Videos Automatically

AutoShorts generates word-level animated subtitles that can boost engagement by up to 80%. Professional captions for TikTok, Instagram Reels, and YouTube Shorts — powered by AI.

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No credit card required — 3 free credits included

Karaoke
One-liner
Vibrant

Built by a creator, for creators

See the clips our users are creating with AutoShorts every day

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How AI Caption Generation Works

Three steps from video to captioned content

1

Upload Your Video

Upload any video file or paste a YouTube URL. We support videos up to 90 minutes long.

2

AI Generates Captions

WhisperX transcribes your audio with word-level timestamps, then our engine creates animated subtitle overlays.

3

Download Your Captioned Video

Download your video with perfectly synced animated captions — ready to post on any platform.

Frequently Asked Questions

Common questions about AI caption generation

AutoShorts supports captions in all languages. Our AI transcription engine automatically detects the spoken language and generates accurate word-level captions.
The AI generates highly accurate captions automatically. If needed, you can regenerate captions with a different style, or download the video and make additional edits in your preferred video editor.
Yes, captions are rendered directly onto your video so they display perfectly on every platform — no player support needed. The output is a single MP4 file with animated captions baked in.
We offer 6 animated caption styles: Hormozi (bold cyan highlights), MrBeast (yellow with orange accents), Karaoke (color wipe animation), Minimal (clean and professional), Bounce (playful pop effect), and Classic (traditional yellow highlights). Each style features word-by-word animation and is optimized for social media engagement.
AutoShorts uses WhisperX, achieving high accuracy across all supported languages. It handles fast speech, multiple speakers, and various accents reliably.

Add Professional Captions to Your Videos

Stop spending hours manually adding subtitles. Let AI generate perfectly timed, animated captions in seconds.

No credit card required — 3 free credits included