9:16 Positioning
Position subtitles in the safe zone, above navigation bars and below profile icons, and preview placement before export.
Vertical Video
Subtitles Built for Vertical Video
Stop cropping horizontal subtitle styles onto vertical content. Generate captions for 9:16 video and adjust their position, size, and style for Reels, Shorts, and TikTok.
9:16
Optimized
MP4 or MOV
Video Upload
3 min
Free to Start
Features
Designed for short-form vertical content
Vertical-First Styles
Caption styles for portrait mode. Use larger fonts, shorter lines, and centered or bottom-third placement.
Short-Form Workflow
Upload a short vertical clip, review the caption draft, and export a captioned MP4.
Word-by-Word Animation
Karaoke-style word highlighting that keeps viewers reading along.
Multi-Platform Export
Export a captioned 9:16 MP4 for Instagram Reels, YouTube Shorts, or TikTok. Export quality options depend on your plan.
Multilingual Vertical
Generate vertical captions in Hinglish, English, Hindi, Bengali, Telugu, Marathi, Tamil, Urdu, Gujarati, Kannada, and Punjabi. Preview the script rendering in portrait before export.
Workflow
How to add subtitles to vertical video
Step 1
Upload Vertical Video
Drop your 9:16 MP4 or MOV video - filmed on your phone or exported from an editing app.
Step 2
AI Generates Captions
Speech is transcribed and timed automatically in the spoken language you select.
Step 3
Pick Your Style
Choose a caption style, then adjust font, color, position, and animation for the vertical frame.
Step 4
Export & Post
Download your captioned MP4 and upload it to Reels, Shorts, or TikTok. Export quality options depend on your plan.
Use Cases
Why vertical video needs different subtitles
Safe Zone Awareness
Keep captions clear of platform UI elements - likes, comments, share buttons, and the description area.
Larger Fonts
Vertical videos are viewed on phones, so use a larger caption font than you would for widescreen video.
Short Line Breaks
Keep lines to four or five words so text fits the narrow frame without becoming a wall of tiny text.
Thumb-Stop Styles
Bold, animated caption styles that stand out in a fast-moving feed.
FAQ
Vertical Video Subtitles FAQ
What resolution does it export?
Export quality depends on your plan. The pricing page lists 1080p export for the Starter pack and up to 4K for the Creator and Pro packs.
Can I use it for Stories too?
Yes. Stories use the same 9:16 format, so you can caption them the same way. Check placement against each app's on-screen buttons.
Does it handle face-to-camera videos?
Yes. You choose the caption position; for face-to-camera videos, the bottom third usually keeps captions clear of the speaker's face.
What about videos with text already on screen?
You can manually adjust caption positioning to avoid existing text overlays, graphics, or watermarks in your video.
Can I add subtitles to horizontal video and make it vertical?
CapsAI focuses on captioning - for cropping 16:9 to 9:16, use a tool like CapCut first, then add captions with CapsAI.
Caption your next vertical video
Upload a 9:16 MP4 or MOV video, review the caption draft, and export a captioned MP4. Start with 3 free minutes.
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