AI YouTube Shorts generator

Type a topic.
Get a finished YouTube Short.

Shortmint is an AI YouTube Shorts generator. It writes the script, makes every picture, records the narration, adds word‑by‑word captions and renders a ready‑to‑post vertical video. Then it keeps your channel publishing — on YouTube, Instagram and Facebook — while you sleep.

Get early access See how it works
  • $0 to start
  • No API key needed
  • ~40s Shorts & ~9 min long‑form

Publish straight to

  • YouTube
  • Instagram Reels
  • Facebook Reels

Ready‑made captions for

  • TikTok
  • X
  • LinkedIn
  • Pinterest
  • Snapchat Spotlight

How it works

How the AI Shorts generator works: one sentence in, a finished video out.

Every step a video editor would do by hand, done in order, cached as it goes — so nothing is ever made twice.

  1. 01

    Give it a topic

    Type one line — “why your eyes have a blind spot” — or upload a whole file of ideas. Each line becomes its own video.

  2. 02

    It writes the script

    A tight, six‑part story built to hold attention: hook, mystery, explanation, payoff, twist, call to action. Every scene gets narration, a picture, a caption and a sound note.

  3. 03

    It makes the pictures

    One image per scene, generated in your house style. Or upload your own for any scene — mix and match freely.

  4. 04

    It speaks and moves

    Natural narration, captions that light up word by word, and camera moves chosen for each shot so it never looks like a slideshow.

  5. 05

    It publishes

    Title, description, hashtags, tags and thumbnail are written for you. Upload in one click, or let the schedule do it.

Made with Shortmint

Real AI-made Shorts, live on YouTube.

These three come from BioCurious, a biology channel that makes its Shorts with Shortmint. Each one started as a single topic line.

See the BioCurious channel ↗

Tested on a real channel

What an AI Shorts channel actually gets.

BioCurious is made end to end with Shortmint, and these are its own YouTube numbers. They're small and real: a new faceless channel, not a case study picked from thousands.

—public Shorts posted
—views on those Shorts
—watched on the best Short
0minutes spent editing

The best-kept video so far is “”. What the channel learned from these numbers is written up on the About page.

Use cases

One AI video generator, six kinds of video.

The same pipeline makes faceless Shorts, Reels, TikToks and full-length YouTube videos.

The story engine

A Shorts script structure that keeps people watching.

Not a list of facts read over stock photos. Each script is written to a fixed six‑part clock, tuned on what actually made viewers stay.

Hook0–4s

Something you can try with the phone in your hand.

Mystery4–10s

The question you now need answered.

Explanation10–22s

The why — with at least one animated diagram.

Payoff22–28s

The picture that makes it click.

Twist28–34s

A fix or a surprise to remember.

CTA34–40s

Your branded end card & subscribe line.

✓ Nothing on screen is ever static

✓ Sound on every cut

✓ Styled captions on every line

✓ 30 ready‑to‑use briefs included

Features

A full AI video editor. No timeline to drag.

Everything you'd need an editor, a voice artist and a social media manager for — in one place.

A simple scene editor

Each scene is just two things: what's said and what's shown. Write them yourself, or press Draft scenes and the whole script fills in from your topic. Regenerate a single picture without redoing the rest.

Natural narration

Pick from dozens of voices and speaking rates. Press ▶ to hear a sample before you commit.

Word‑by‑word captions

Big, styled captions that highlight each word as it's spoken — the way people watch with the sound off.

Camera moves that think

Each shot gets its own move — push in on a close‑up, pull out on a reveal, pan across a wide picture. No two in a row repeat.

Templates for your look

Save voice, pace, format, motion and image style as a template. Every video matches — no re‑tuning.

Background music

Drop in your own tracks; they're mixed under the voice and looped to length automatically.

Branded end card

Every video signs off with your channel name, a subscribe button and a spoken call to action — spelled right every time.

Projects for every channel or client

Shorts in one, client work in another — each with its own look, voice, queue and folder. Move a video in one click; nothing re‑renders.

Autopilot

YouTube Shorts automation: your channel keeps posting, even when you don't.

Turn it on once. Shortmint makes a new video on a schedule, around the clock, for as long as it's running. How Shorts automation works.

  • Never runs dry. It works through your queue of ideas — and when the queue is empty, it thinks up a fresh topic your channel hasn't covered yet.
  • Feels human. Videos land at slightly different times each day, not like a robot firing at 9:00 sharp.
  • Doesn't give up. One bad video doesn't stop the channel. It notes the failure and tries the next slot on time.
  • Picks up where it left off. Restart the app and the schedule carries on.
  • Run one now. Want a video this minute? One button, and the schedule's clock doesn't move.

Bulk ideas

Bulk video creation: a month of Shorts from one file.

Paste a list of topics into a text file and upload it. One line is one video. That's the whole rule.

  • Works with .txt, .csv and .json.
  • Longer briefs? Separate them with --- and they stay whole.
  • Re‑upload a longer file and only the new ideas are added — duplicates are skipped.
  • Not sure which project yet? Park ideas as unassigned and sort them later.

Publishing

YouTube SEO done for you: the listing is written before you upload.

Every finished video comes with its full upload kit — and a score that tells you, in plain words, what to fix.

The upload kit

  1. Thumbnail generated in the right shape, with the 2–3 words you choose printed on it.
  2. Title plus the keyword you want to rank for.
  3. Description with a live preview of what shows before “more”.
  4. Hashtags that people actually browse.
  5. Tags with the character budget counted as you type.

Write it for me drafts all five from the video's own narration. Have a backlog? Write all listings does every video at once.

0SEO score
  • Title is 58 characters — in the sweet spot
  • Keyword appears in the first 40 characters
  • Keyword survives into the visible description
  • Thumbnail present
  • Add 2 more tags to use your budget

One caption, recast for every platform.

Pick a platform and the caption you wrote reshapes itself to that platform's length and style. Copy, and the upload page opens with it on your clipboard.

YouTube

Uploads for real — video, title, description, tags and thumbnail — with a progress bar and a live link when it lands. Goes up private by default, so nothing is public until you say so.

Instagram Reels

Posts on its own schedule, by default echoing what's already on your YouTube. Every Meta limit is checked before a byte is sent.

Facebook Reels

Posts to your Page as Reels from the same videos. Connect once with a token that never expires.

Long videos New

Not just Shorts. Nine‑minute long-form YouTube videos, too.

Turn one topic into a full 16:9 YouTube video — an intro, numbered chapters, a payoff and a 12‑second end screen where YouTube's subscribe buttons sit. More on long-form videos.

  • Chapters drawn, not guessed. Chapter cards and on‑screen tests are drawn pixel‑exact, so “try this now” moments actually work.
  • Its own screen and schedule. Long videos live apart from your Shorts and can be made daily.
  • Picks up where it stopped. Every scene is saved as it's made, so an interrupted run carries on instead of starting over.

Peace of mind

Built to run a faceless channel unattended.

You hear about problems

A failed video raises a desktop notification and can ping your phone, Slack or Discord — not a silent line in a log you'll read in three days.

Daily backups

Your listings, queues and settings are snapshotted every day, with two weeks kept. The work you edited by hand is never lost.

Private by design

It runs on your own computer. Your videos, scripts and channel logins stay with you — nothing goes anywhere until you publish it.

Pricing

A free AI video generator. Genuinely.

Every part of the pipeline runs on free tools and free tiers. No credit card, no trial clock.

$0/month

Everything on this page.

Get early access
  • Script writingFree
  • Image generationFree tier
  • VoiceoverFree
  • Video renderingFree, on your machine
  • YouTube uploadsFree · ~6 a day
  • Instagram & FacebookFree

The honest part: free image tiers have usage caps. Shortmint paces itself around them — the default schedule is one Short every five hours — and switches to a second image source when the first runs out.

FAQ

AI YouTube Shorts generator: questions, answered.

Do I need to know how to edit video?

No. There's no timeline. You give it a topic — or a list of topics — and it hands back a finished, captioned, rendered video. If you want control, you can rewrite any line or swap any picture.

Will every video look the same?

No. Camera moves are chosen per shot from what the picture and narration are about, captions follow the voice, and the end‑card line changes from video to video. Templates keep your style consistent without making videos identical.

Can I use my own images?

Yes. Every scene has a Generate / Upload switch. Upload a JPG, PNG or WEBP and that scene uses it exactly as it is.

Is anything posted publicly without my say‑so?

YouTube uploads go up private by default, and a manual upload asks you to confirm first. Instagram and Facebook schedules are off until you switch them on, and by default only post what's already on YouTube.

What do I need to run it?

A Mac with Node.js 22. The video tools come bundled — there's nothing else to install for rendering. Connecting YouTube takes about ten minutes, once.

Can I make faceless YouTube Shorts with AI?

Yes. That's what Shortmint is for. Nobody appears on camera and nobody records a voice: the narration is generated, every scene is an AI picture or a diagram, and the captions are written from the narration. See faceless YouTube Shorts.

Is there a free AI YouTube Shorts generator?

Shortmint is free. Script writing, voiceover and rendering cost nothing, image generation uses free tiers, and YouTube uploads use YouTube's free API allowance of about six a day. There's no Shortmint watermark and no credit card.

Can it post YouTube Shorts automatically?

Yes. Set upload times and a daily cap, and it uploads each finished video with its title, description, tags and thumbnail. Uploads go up private unless you choose otherwise, or with a publish time so YouTube makes them public on its own. See YouTube Shorts automation.

Does it work for TikTok and Instagram Reels?

The videos are 1080×1920, the size all three use. It posts to Instagram Reels and Facebook Reels by itself. TikTok has no automatic posting here. You download the video and paste the caption it reshapes for TikTok. See the TikTok video generator page.

Can AI-made Shorts be monetised?

YouTube judges the channel, not the tool. Channels that repeat one template with nothing original can be refused for the Partner Program as reused or repetitive content. Shortmint writes a new script, new pictures and a new narration for every topic, but you are still the one who decides what the channel is about and whether each video is worth watching.

What size videos does it make?

Vertical 1080×1920 Shorts and Reels of about 30–40 seconds, and 16:9 long videos of around nine minutes.

Your first video is one click away.

Shortmint is in early access. Send an email and you will get a reply with how to set it up.

Get early access