X (Twitter) Subtitle Generator — Captions for the Tweet Feed
X/Twitter videos autoplay silently in the timeline. CutSnap adds burned-in captions to your X videos — optimised for the timeline format, quick to produce, and exported at Twitter-compatible settings.
Why It Matters
Why X/Twitter Videos Need Captions
On X, videos compete with text and images in a fast-scrolling feed. Captions let viewers consume your video content silently — which is how most tweets are read.
How It Works
Caption X/Twitter Videos in 3 Steps
Upload Your X Video
MP4 in landscape or portrait format. CutSnap transcribes the audio immediately.
Edit and Style
Fix transcription errors and apply a caption style optimised for Twitter's compact feed.
Export and Tweet
Download the captioned MP4 and upload it directly to your tweet.
Tips
X/Twitter Caption Best Practices
Lead with the hook
Twitter users scroll fast. Your first caption block — in the first second — needs to signal exactly what the video is about.
Keep videos under 2:20 for maximum reach
Videos under 2:20 play inline in the feed without requiring a click through to Twitter Media Studio.
High contrast for the feed
Twitter's feed has both light and dark mode. White text on a dark semi-transparent background reads well in both.
FAQ
Does X/Twitter support separate caption files?
X does not support external SRT/VTT caption tracks in the standard tweet video player. Burned-in captions from CutSnap are the recommended approach.
What is the max video length for Twitter?
Most accounts can upload videos up to 2 minutes and 20 seconds. Twitter Blue / X Premium users can upload longer videos. CutSnap supports the required lengths.
Can I add captions to a Twitter Space clip?
Yes. Download the audio clip or screen recording from Twitter Spaces, upload it to CutSnap, add captions, and post it as a regular video tweet.
What format should I export for Twitter?
MP4 H.264 with AAC audio is Twitter's preferred format and is the default CutSnap export. Recommended max resolution is 1920×1200 for landscape.
Caption Your X Videos Free
No credit card. First video ready in under 2 minutes.
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