Video generatorConfigure here, generate in the appUpdated
Paste your script, get a polished video with visuals and voiceover.
Paste a finished script and ShortFast handles everything that normally sits between writing and publishing: choosing visuals for each line, recording a voiceover, burning in captions, and cutting the whole thing to the pacing short-form demands.
This is the mode to use when the words already exist. If you have a blog post, a newsletter section, a podcast segment, or a script you wrote yourself, you're not looking for an idea generator, you're looking for a production line.
How it works
Drop in the narration exactly as you want it read. Write for the ear rather than the page: short sentences, one idea per line, no subheadings or bullet formatting.
Choose the voice that reads your narration. Match it to the audience rather than to your own taste, an explainer for founders and a story for teenagers do not want the same delivery.
One of 27 styles: stock footage for credibility, AI images or AI video for scenes no stock library has, or mixed to get both. Mixed is the safe default for most scripts.
Vertical 9:16 for TikTok, Reels and Shorts, landscape 16:9 for YouTube, or 4:5 and 1:1 for feeds. Captions are burned in rather than uploaded as a separate track, in caption styles like Bold, Highlight, Pop and Neon.
ShortFast assembles the video and hands it to your posting queue, so the same script can go out to several platforms without re-exporting anything.
The most common reason a script-to-video output feels flat is that the script was written to be read, not heard. Prose that works on a page is usually too dense when spoken: subordinate clauses lose people, and a paragraph that scans fine visually becomes an unbroken wall of narration.
The fix is mechanical. Cut every sentence that has two ideas in it into two sentences. Read the script out loud once and delete whatever you stumble on. Put the conclusion first rather than building to it, because in short-form the viewer decides whether to stay before you reach your third sentence.
If you're repurposing a blog post, don't paste the introduction. Blog intros exist to reassure a reader who already clicked; a video opening has to earn a viewer who hasn't decided yet. Start at the point where the post gets specific.
A blog post that ranks is a piece of content that already survived a filter: someone searched, read it, and stayed. That's a reasonable signal that the topic has an audience, which makes it a better bet for video than something invented from scratch.
The mistake is treating one post as one video. A 1,500-word article usually contains four or five separate claims, each of which is a video. Pulling them apart gives you a month of content from one source instead of a single overstuffed 60-second summary that covers everything and lands nothing.
The same is true in reverse. Videos that perform tell you which arguments your audience responds to, which is useful input for what to write next.
If you don't have a script yet and don't want to write one, prompt-to-video starts from a topic and writes the narration for you. Script-to-video assumes the writing is done and does not rewrite what you paste.
If your source is an existing long video rather than text, the YouTube-to-Shorts tool finds the segments worth cutting instead of generating new footage around narration.
And if you only want the hook rather than a whole production, the free hook generator runs in your browser with no account.
FAQ
Keep going
No script yet? Start from a topic instead.
OpenVideo generatorThe same pipeline, aimed at faceless channels.
OpenFree toolRepurposing long video instead of text.
OpenFeatureHow ShortFast writes narration when you don't.
OpenFeatureHow the burned-in captions are generated.
OpenGuideTurning one source into a month of content.
OpenShortFast writes the script, generates the video, adds captions, and posts it to TikTok, Reels, and YouTube Shorts for you, every day.
Explore more
Discover other AI-powered tools to speed up your content workflow.
Type a theme or paste your own affirmations. ShortFast writes or keeps the words, builds a scene for every line in a watercolor, paper cutout, cinematic or nature-footage look, narrates it and adds captions.
Learn moreToolUnique AI-created visuals that stand out from stock footage: ShortFast generates an AI image or video clip for every scene of your script, timed to the voiceover. A minute of video with AI images costs about 37 credits.
Learn moreToolType an animal, a fact or a story idea. ShortFast writes the script, builds a scene for every line from real wildlife footage or in a 3D, clay or paper look, narrates it and adds captions.
Learn moreToolType a Bible story, a verse or a prayer. ShortFast writes the script, builds a scene for every line in a classical painting, watercolor or 3D animated look, narrates it and adds captions.
Learn moreToolType one life and the moment that changed it, with the facts you checked, or paste your own narration. ShortFast writes the script or keeps your words, builds a scene for every line in a pencil-sketch, archival, painted or cartoon look, narrates it and adds captions.
Learn moreToolType a book and the one idea you want to explain. ShortFast writes the script, builds a scene for every line in a stick-figure, whiteboard, sketch or painted look, narrates it and adds captions.
Learn more