Make Your X (Twitter) Videos Unmissable with AI Captions
Stop the scroll in the feed. Auto-generate word-level animated subtitles with 99%+ accuracy, custom fonts, and emoji reactions designed for viral tech and startup threads.
Key Features
Word-by-Word Animation
Keep the fast-paced Twitter audience engaged with captions that light up as you speak, perfectly synced with your audio.
99% Transcription Accuracy
Our AI engine handles complex tech jargon and startup terminology with ease, requiring minimal manual correction.
Custom Branding & Emojis
Match your brand's aesthetic on X with custom fonts and colors. Automatically insert relevant emojis to increase click-through rates.
Native SRT Export
Burn captions directly into your video for maximum impact or export a clean SRT file to upload natively to the X Media Studio.
How It Works
- 1
Upload to Browser
Drag and drop your 16:9 or 1:1 video into the DevMotion editor. No installation or desktop app required.
- 2
AI Transcription
Click 'Auto-Caption' and select your language. Our AI generates timed subtitles with word-level precision in seconds.
- 3
Style for the Feed
Choose your animation style, add emojis, and adjust colors to make your text pop against the X dark mode interface.
- 4
Export and Post
Export in 1080p or 4K and share directly to your Twitter thread to maximize reach and engagement.
Use Cases
Tech Product Demos
Showcase your SaaS features in a Twitter thread with clear, animated captions that explain the value prop even when the sound is off.
News & Commentary
Breaking news clips perform better when users can read the headlines and key quotes instantly while scrolling through their timeline.
Founder Updates
Build in public by sharing talking-head videos. Captions make your updates accessible and professional for the startup community.
Frequently Asked Questions
How do I add captions to a Twitter video without a watermark?
DevMotion allows you to export 720p videos with AI-generated captions for free without any watermarks. Simply upload your video, run the auto-caption tool, and export.
What is the best caption style for X (Twitter) viral videos?
Word-level animations (where the current word is highlighted) generally perform best on X because they grab attention in the fast-scrolling feed and keep viewers locked in.
Can I edit the AI-generated subtitles if there is a mistake?
Yes, our editor provides a full transcript view where you can click any word to correct spelling, adjust timing, or change the emoji reaction.
Does Twitter support SRT files for accessibility?
Yes, X allows you to upload SRT files in the Media Studio. DevMotion gives you the option to either burn the captions into the video or download the SRT file separately.
Will these captions work for videos longer than 2 minutes?
Absolutely. While free X accounts are limited to 2:20, DevMotion can caption videos of any length, making it perfect for X Premium users who post longer content.
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