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AI Caption Generator

Add Captions to Videos Automatically

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

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No credit card required — 3 free clips included

Why Creators Love Our AI Captions

Word-level animated subtitles that make your content impossible to scroll past

Word-Level Animation

Each word highlights as it's spoken — creating eye-catching, TikTok-style animated captions that hold attention.

99% Transcription Accuracy

Powered by WhisperX — the same technology behind the best speech-to-text models. Accurate even with fast speech and accents.

Customizable Styles

Choose from multiple caption styles, colors, and animations. Match your brand or pick a viral-optimized preset.

Auto-Synced Timing

Captions are perfectly synced to speech at the word level. No manual timing adjustments needed.

Boost Engagement 80%

Most social media is watched on mute. Animated captions ensure your message reaches every viewer.

All Platforms Supported

When you add captions, they are rendered onto the video so they display perfectly on TikTok, Instagram, YouTube, LinkedIn, and Twitter.

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 Captioned Clips

Download your clips and optionally add professional animated captions — choose a style, customize, and they're 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, change caption styles, or download the clips and make additional edits in your preferred video editor.
Captions are not burned in by default. You can download your clips without captions, or add and customize captions at any time. When you do add them, they are rendered onto the video so they display perfectly on every platform.
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 clips included

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