Video generatorConfigure here, generate in the appUpdated
Describe your idea, get a complete video in minutes.
Describe what the video should be about in ordinary language and ShortFast writes the script, picks the visuals, records a voiceover, burns in captions, and assembles the result. You do not need to write anything beyond the prompt itself.
This is the fastest path from an idea to something publishable. It is also the mode where prompt quality matters most, because everything downstream is generated from that one instruction.
How it works
State the topic, who it's for, and what the viewer should take away. "Why small cafés lose money on delivery apps, for independent owners" beats "a video about restaurants".
Choose the narrator. Match the delivery to the audience and the subject, since the same script can land or fall flat depending on pace and tone.
One of 27 styles: stock footage, AI-generated images in looks from stick figures to claymation, AI video, or a mix. Abstract topics tend to need AI visuals because stock libraries have nothing for them.
The script is written before the video is rendered, so this is where to correct a claim or sharpen the opening rather than after the fact.
ShortFast produces the video and drops it into your posting queue for TikTok, Reels and YouTube Shorts.
The single biggest determinant of output quality is how specific the prompt is. "Marketing tips" gives you the average of everything ever said about marketing, which is exactly the kind of content that gets scrolled past because the viewer has seen it a hundred times.
Three things make a prompt concrete: a narrow topic, a named audience, and a single takeaway. "How freelance designers should price a rebrand, for people who currently charge hourly" contains all three, and the resulting script has somewhere to go.
It also helps to state the angle rather than only the subject. A video that argues something specific outperforms one that surveys a topic neutrally, because a position gives the viewer a reason to react.
Because the cost of producing a variation is close to zero, the sensible strategy is different from traditional video. Rather than perfecting one video, generate several takes on the same idea with different openings and let the platform tell you which one has legs.
This is the part that's hard to do by hand and easy to do here. Testing three hooks on the same topic used to mean three shoots; now it means running the same prompt three times and posting all three.
Once something works, the winning angle becomes the prompt pattern for the next batch rather than a one-off.
If you already wrote the narration, use script-to-video. Prompt-to-video will write its own script and ignore your wording, which is not what you want when the words are the point.
If your source is an existing long video, YouTube-to-Shorts finds the segments worth cutting rather than generating new material around a topic.
And if the video needs facts only you have, internal numbers, a client result, a specific process, write the script yourself. Generated narration is good at structure and delivery, not at knowing things about your business.
FAQ
Keep going
Already wrote the narration? Use this instead.
OpenVideo generatorThe same pipeline, tuned for TikTok.
OpenFree toolTest openings before committing to a video.
OpenFeatureHow the narration gets written.
OpenFeatureA/B hook variations (coming soon), and series that post themselves.
OpenShortFast writes the script, generates the video, adds captions, and posts it to TikTok, Reels, and YouTube Shorts for you, every day.
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