Generate vertical format videos optimized for mobile platforms using AI. Automatically format horizontal content to 9:16 aspect ratio, add captions, apply platform-specific templates, and export in multiple resolutions for TikTok, Instagram Reels, and YouTube Shorts.
We spent 15+ hours benchmarking AI models for vertical video - create 9:16 videos for tiktok, reels & shorts while building Wireflow, documenting which settings and configurations produce the best outputs. The workflow below reflects what we learned.
Capabilities validated across hundreds of production workflows and real client deliverables.
AI tracks faces, text, and moving objects across all frames to maintain focus on key elements when converting to 9:16 format. The system analyzes motion patterns and applies smooth panning that follows subject movement, preventing jarring jumps or cropped-out speakers that occur with static center-crop methods.
Automatically applies TikTok, Instagram Reels, and YouTube Shorts interface overlays to ensure captions, logos, and key visuals stay visible outside UI elements like profile buttons and progress bars. Each platform preset includes correct safe zones, recommended caption positioning, and optimal export resolution.
Convert up to 25 videos simultaneously while maintaining consistent caption styling, color grading, and framing preferences across the entire batch. Save custom presets for recurring content series to ensure brand consistency across all vertical video outputs without manually configuring each file.
Export vertical videos in 1080x1920 for standard quality or 1440x2560 for high-definition mobile displays. Includes codec optimization for each platform's compression algorithms, reducing file size by 30-40% while maintaining visual quality that survives platform re-encoding.
Get started in just a few simple steps.
Import your source video (MP4, MOV, or WebM) and choose your target platform (TikTok, Instagram Reels, or YouTube Shorts). The AI will apply platform-specific aspect ratios, safe zones, and recommended export settings automatically.
Review the AI-suggested framing and adjust tracking sensitivity if needed. Enable auto-captions with your preferred font, size, and positioning. Select background music from the library or upload your own audio track to accompany the vertical video.
Preview the vertical video with platform UI overlay to verify all elements remain visible. Make any final adjustments to caption timing or framing keyframes, then export in your chosen resolution with platform-optimized encoding for upload.
Build Any AI Workflow
AI Models Integrated
Full Commercial License
Start creating instantly with these pre-built AI workflows. Customize them to fit your needs.
An AI vertical video generator is a tool that converts video content into 9:16 aspect ratio format optimized for mobile platforms like TikTok, Instagram Reels, and YouTube Shorts. The AI analyzes each frame to identify key subjects, applies intelligent cropping to keep focal points centered, auto-generates captions with speaker detection, and reformats horizontal or square videos for vertical display without losing important visual elements.
Upload your source video in any format (16:9, 4:3, or square). The AI analyzes the footage to detect faces, text, and primary subjects across all frames. Select your target platform (TikTok, Reels, or Shorts) to apply platform-specific safe zones and text positioning. The AI automatically reframes each scene to 9:16, tracking movement to keep subjects centered. Add auto-generated captions with customizable fonts and positioning, then export in your chosen resolution (1080x1920 or 1440x2560).
Yes, modern AI vertical video generators use multi-subject tracking to handle videos with multiple speakers. The system identifies all faces in each frame and applies dynamic reframing that pans or zooms to include active speakers based on audio cues. For interview-style content with two people, the AI can maintain both subjects in frame or cut between them based on who's speaking. You can set preferences for split-screen layouts versus dynamic reframing depending on your content style.
Source videos in 1920x1080 or 4K (3840x2160) provide the best results for vertical conversion because they offer sufficient resolution when cropped to 9:16. The AI can process MP4, MOV, and WebM formats. For optimal subject tracking, use videos with clear lighting and avoid extreme wide shots where subjects occupy less than 15% of the frame. Videos shot in 16:9 with subjects positioned in the center third convert most reliably, though the AI can handle off-center compositions by applying intelligent panning.
AI captioning uses speech-to-text models to transcribe audio, then segments the text into readable chunks based on natural speech pauses. The system timestamps each word for precise synchronization and positions captions in the platform-safe zone (typically the middle third of the frame for vertical videos). You can customize caption styling including font choice, size, color, background opacity, and animation style (pop-in, fade, or typewriter effect). The AI detects profanity and can auto-censor or flag it for manual review before export.
Explore our collection of AI-powered creative tools. Each tool is free to try with no watermarks.
Convert written narratives into multi-scene video stories with automated visual sequencing, character consistency across frames, and synchronized narration. Built for content creators producing educational series, brand narratives, and social media story content at scale.
Try free →Generate original images from text prompts using neural networks trained on millions of visual concepts. Control composition, style, lighting, and subject matter through natural language descriptions without manual drawing or photo editing skills.
Try free →Generate custom digital artwork in styles ranging from photorealism to anime using text-based prompts. Control composition, color palettes, and artistic techniques without traditional drawing skills.
Try free →Convert written scripts, articles, and text descriptions into video content with synchronized visuals, voiceover, and scene transitions. Our AI analyzes narrative structure to generate contextually relevant video sequences that match your script's pacing and tone.
Try free →Generate video content from text prompts, scripts, or storyboards using multi-modal AI models. Wireflow combines text-to-video synthesis with automated scene composition, motion control, and audio synchronization to produce broadcast-ready footage without camera equipment or editing software.
Try free →Turn written scripts or text descriptions into complete videos with AI-generated visuals, voiceovers, and transitions. Built for marketers, content creators, and social media teams who need to produce video content at scale without traditional video editing.
Try free →Written by
Andrew AdamsCo-Founder & Operations at Wireflow
Runs client operations and content strategy at Wireflow. Works directly with creative teams and agencies to build production AI workflows.
Upload your content and convert to mobile-optimized 9:16 format with AI-assisted framing and captions in minutes
Generate vertical format videos optimized for mobile platforms using AI. Automatically format horizontal content to 9:16 aspect ratio, add captions, apply platform-specific templates, and export in multiple resolutions for TikTok, Instagram Reels, and YouTube Shorts.
We spent 15+ hours benchmarking AI models for vertical video - create 9:16 videos for tiktok, reels & shorts while building Wireflow, documenting which settings and configurations produce the best outputs. The workflow below reflects what we learned.
Capabilities validated across hundreds of production workflows and real client deliverables.
AI tracks faces, text, and moving objects across all frames to maintain focus on key elements when converting to 9:16 format. The system analyzes motion patterns and applies smooth panning that follows subject movement, preventing jarring jumps or cropped-out speakers that occur with static center-crop methods.
Automatically applies TikTok, Instagram Reels, and YouTube Shorts interface overlays to ensure captions, logos, and key visuals stay visible outside UI elements like profile buttons and progress bars. Each platform preset includes correct safe zones, recommended caption positioning, and optimal export resolution.
Convert up to 25 videos simultaneously while maintaining consistent caption styling, color grading, and framing preferences across the entire batch. Save custom presets for recurring content series to ensure brand consistency across all vertical video outputs without manually configuring each file.
Export vertical videos in 1080x1920 for standard quality or 1440x2560 for high-definition mobile displays. Includes codec optimization for each platform's compression algorithms, reducing file size by 30-40% while maintaining visual quality that survives platform re-encoding.
Get started in just a few simple steps.
Import your source video (MP4, MOV, or WebM) and choose your target platform (TikTok, Instagram Reels, or YouTube Shorts). The AI will apply platform-specific aspect ratios, safe zones, and recommended export settings automatically.
Review the AI-suggested framing and adjust tracking sensitivity if needed. Enable auto-captions with your preferred font, size, and positioning. Select background music from the library or upload your own audio track to accompany the vertical video.
Preview the vertical video with platform UI overlay to verify all elements remain visible. Make any final adjustments to caption timing or framing keyframes, then export in your chosen resolution with platform-optimized encoding for upload.
Build Any AI Workflow
AI Models Integrated
Full Commercial License
Start creating instantly with these pre-built AI workflows. Customize them to fit your needs.
An AI vertical video generator is a tool that converts video content into 9:16 aspect ratio format optimized for mobile platforms like TikTok, Instagram Reels, and YouTube Shorts. The AI analyzes each frame to identify key subjects, applies intelligent cropping to keep focal points centered, auto-generates captions with speaker detection, and reformats horizontal or square videos for vertical display without losing important visual elements.
Upload your source video in any format (16:9, 4:3, or square). The AI analyzes the footage to detect faces, text, and primary subjects across all frames. Select your target platform (TikTok, Reels, or Shorts) to apply platform-specific safe zones and text positioning. The AI automatically reframes each scene to 9:16, tracking movement to keep subjects centered. Add auto-generated captions with customizable fonts and positioning, then export in your chosen resolution (1080x1920 or 1440x2560).
Yes, modern AI vertical video generators use multi-subject tracking to handle videos with multiple speakers. The system identifies all faces in each frame and applies dynamic reframing that pans or zooms to include active speakers based on audio cues. For interview-style content with two people, the AI can maintain both subjects in frame or cut between them based on who's speaking. You can set preferences for split-screen layouts versus dynamic reframing depending on your content style.
Source videos in 1920x1080 or 4K (3840x2160) provide the best results for vertical conversion because they offer sufficient resolution when cropped to 9:16. The AI can process MP4, MOV, and WebM formats. For optimal subject tracking, use videos with clear lighting and avoid extreme wide shots where subjects occupy less than 15% of the frame. Videos shot in 16:9 with subjects positioned in the center third convert most reliably, though the AI can handle off-center compositions by applying intelligent panning.
AI captioning uses speech-to-text models to transcribe audio, then segments the text into readable chunks based on natural speech pauses. The system timestamps each word for precise synchronization and positions captions in the platform-safe zone (typically the middle third of the frame for vertical videos). You can customize caption styling including font choice, size, color, background opacity, and animation style (pop-in, fade, or typewriter effect). The AI detects profanity and can auto-censor or flag it for manual review before export.
Explore our collection of AI-powered creative tools. Each tool is free to try with no watermarks.
Convert written narratives into multi-scene video stories with automated visual sequencing, character consistency across frames, and synchronized narration. Built for content creators producing educational series, brand narratives, and social media story content at scale.
Try free →Generate original images from text prompts using neural networks trained on millions of visual concepts. Control composition, style, lighting, and subject matter through natural language descriptions without manual drawing or photo editing skills.
Try free →Generate custom digital artwork in styles ranging from photorealism to anime using text-based prompts. Control composition, color palettes, and artistic techniques without traditional drawing skills.
Try free →Convert written scripts, articles, and text descriptions into video content with synchronized visuals, voiceover, and scene transitions. Our AI analyzes narrative structure to generate contextually relevant video sequences that match your script's pacing and tone.
Try free →Generate video content from text prompts, scripts, or storyboards using multi-modal AI models. Wireflow combines text-to-video synthesis with automated scene composition, motion control, and audio synchronization to produce broadcast-ready footage without camera equipment or editing software.
Try free →Turn written scripts or text descriptions into complete videos with AI-generated visuals, voiceovers, and transitions. Built for marketers, content creators, and social media teams who need to produce video content at scale without traditional video editing.
Try free →Written by
Andrew AdamsCo-Founder & Operations at Wireflow
Runs client operations and content strategy at Wireflow. Works directly with creative teams and agencies to build production AI workflows.
Upload your content and convert to mobile-optimized 9:16 format with AI-assisted framing and captions in minutes
