Muted autoplay ready
80% of X videos play without sound in-feed. Subtitles ensure your message lands even on mute.
Twitter/X Subtitles
Subtitle Generator for Twitter/X - AI Captions for X Videos
Add attention-grabbing subtitles to your Twitter/X videos. Optimized for the 2:20 video limit, in-feed muted autoplay, and X's algorithm that prioritizes accessible content. Boost impressions with readable captions that stop the scroll.
2:20
max video optimized
80%
X videos watched muted
3x
more engagement with subs
Features
Why subtitles matter on Twitter/X
2:20 format optimized
Caption timing and text length tuned for X's maximum 2 minute 20 second video format.
Stop-the-scroll captions
Bold, readable subtitle styles designed to capture attention in the fast-moving X timeline.
Reach global audiences
Auto-translate subtitles to 50+ languages. Expand your X content beyond English-speaking followers.
Algorithm-friendly
X prioritizes accessible content. Subtitled videos get more impressions, replies, and retweets.
Thread-ready clips
Generate subtitled clips perfect for X threads. Each clip gets its own perfectly-timed captions.
Workflow
How to add subtitles to X videos
Step 1
Upload your X video
Upload any video up to 2:20 long. MP4, MOV, or any common format accepted.
Step 2
AI generates captions
Automatic transcription with 99%+ accuracy. Handles fast speech, slang, and multiple speakers.
Step 3
Style for X
Choose bold, high-contrast caption styles optimized for X's dark and light mode feeds.
Step 4
Export and post
Download with burned-in subtitles ready to upload directly to X. No quality loss.
Use Cases
Maximize your X video performance
Higher impressions
Subtitled videos get 28% more impressions on X because the algorithm rewards accessible content and longer watch times.
More replies and quotes
When viewers can read your message without unmuting, they're more likely to engage with replies and quote tweets.
Works in X Spaces clips
Turn your X Spaces recordings into subtitled clips. Perfect for repurposing audio content as video posts.
Brand-safe styling
Consistent caption styling across all your X videos. Save brand presets and apply them in one click.
FAQ
Twitter/X subtitle generator FAQs
What's the best subtitle format for X videos?
Burned-in (hardcoded) subtitles work best on X since the platform doesn't support separate subtitle tracks. CapsAI burns captions directly into your video.
Does X's algorithm favor subtitled videos?
Yes. X prioritizes accessible content and subtitled videos consistently get higher impressions and engagement rates in the feed.
Can I subtitle X Spaces recordings?
Absolutely. Download your Spaces recording, upload to CapsAI, and get subtitled clips perfect for posting as video tweets.
What video specs work best for X?
X supports up to 1920x1200, but 1:1 square or 16:9 landscape perform best in-feed. CapsAI exports in any aspect ratio you need.
Is CapsAI free for X videos?
Yes. The free tier includes subtitle generation, styling, and export with no watermark. Enough for most X creators.
Get more views on every X video
Add AI subtitles optimized for Twitter/X. Stop-the-scroll captions that work on mute. Free, no watermark.
Try CapsAI Free →