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AI video generators create new Shorts from prompts, scripts, images or audio, while repurposing tools turn existing long videos into shorter vertical clips.
Key factors include 9:16 output, automation, processing speed, captions, sound options, supported inputs and pricing that fits regular content production needs.
Pexo suits idea-based creation, Runway and Pika focus on visual creativity, while OpusClip targets creators who already have long-form video footage.
Producing short videos on a regular schedule takes a lot of time. Writing the script, recording, editing, and adding captions are each separate tasks. AI video tools now handle most of this work automatically. Some build a video from a simple idea. Others take a long video you already have and turn it into several short clips. Choosing the right tool saves a significant amount of time each week.
This guide explains what matters most when selecting a tool, and which options stand out this year.
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Not every ‘AI video generator’ performs the same function. Before choosing a tool, consider one central question: are you creating a video from scratch, or extracting one from footage you have already filmed?
Generating from an idea: You type a sentence, upload a photo, or paste a script, and the tool builds a new video for you.
Repurposing long video: You already have a podcast, webinar, or vlog, and the tool identifies the strongest moments and turns them into short clips.
These are two distinct jobs, and confusing them leads to wasted effort. A tool designed for generating new clips cannot clip an existing podcast, and a repurposing tool cannot create original footage.
The success of a short video depends on a few essential details. The following factors matter most:
Vertical output: The video should export in true 9:16 format, without awkward black bars.
Speed: A tool that requires twenty minutes of work per clip is not practical for a daily posting schedule.
Level of automation: Some tools write the script, add a voice, and place captions automatically. Others provide a blank timeline and leave the remaining work to the user.
Input options: Text, images, a link, or audio -the more starting points a tool accepts, the more situations it can serve.
Captions and sound: Most viewers watch with the sound off initially, so captions and music are not optional extras. They form the baseline requirement.
Pricing structure: A flat monthly fee is easier to plan around than a credit system that depletes quickly during a busy period.
Prices change often, so check each site directly before you commit.
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Creators working from an idea, a script, or a photo fall into this category. Pexo uses a conversational approach, letting the user describe the video in plain language while the tool writes the script, adds a voice, and assembles the clip in a single exchange. Runway and Pika also belong here, focused primarily on visual quality and creative style rather than a complete production workflow. InVideo AI suits narration-heavy, faceless channels built around a written angle rather than an on-camera presence. Canva serves creators already familiar with the platform who prefer a template-driven look without adopting new software.
OpusClip belongs to this category, and it performs the task effectively. It processes a long recording, a podcast, a livestream, or an interview and identifies the strongest moments, then edits them into vertical clips complete with captions and reframing. It also scores each clip according to its likelihood of performing well. Creators whose channels rely on long recordings already in hand can save considerable time using this approach.
The tool should match the task at hand. Starting with no footage points toward a generator. Those with hours of recorded content should consider a repurposing tool. Many creators use both approaches: one for original short-form ideas, and another for extracting clips from long recordings.
Reviewing the free plan first is advisable. Every tool listed here offers one, though most include a watermark or a usage limit. Testing a free tier for a week provides more insight than any comparison article, including this one.
No single tool serves as the definitive choice in this category, since the right selection depends entirely on the creator's starting point. For the fastest path from a simple idea to a finished vertical clip, Pexo is a strong option. For creators who value visual style above speed, Runway and Pika offer notable strength. For those with long recordings already available, OpusClip converts them into weeks of short-form content. Selecting a tool based on available resources makes the ongoing task of producing Shorts considerably more manageable.
1. What are the best AI video tools for creating Shorts in 2026?
Pexo, InVideo AI, Runway, Canva and Pika are useful for creating new Shorts, while OpusClip is better suited to repurposing existing long-form videos.
2. Which AI video tool is best for turning long videos into Shorts?
OpusClip is designed for repurposing podcasts, interviews, livestreams and other long recordings into vertical clips, adding captions, reframing footage and identifying strong moments.
3. What should creators check before choosing an AI video generator?
Creators should check vertical 9:16 output, automation, processing speed, captions, audio features, input options, free-plan limits and current subscription pricing before selecting a platform.
4. Which AI video tools offer free plans in 2026?
Pexo, InVideo AI, Runway, Canva, Pika and OpusClip currently offer free access or free plans, though features, watermarks, credits and usage limits vary between platforms.
5. Should creators use one AI video tool or multiple tools?
Creators may benefit from using different tools for different workflows, such as one platform for generating original Shorts and another for converting existing podcasts or videos into clips.
