How do I make an AI voiceover for YouTube Shorts?
Type your script into the generator above, choose a voice, nudge the speed up a little, then generate and download the MP3. Import it into your editor with your vertical footage, cut each shot to the sentence it belongs to, and upload. The YouTube mobile app also lets you add a voiceover track when you create a Short.
Shorts reward fast, dense storytelling. Every sentence should either deliver information or push the viewer to the next sentence. That makes AI voiceover a great fit: you can rewrite a line and regenerate it in seconds until the rhythm is right, without recording yourself twenty times.
Shorts script templates that keep people watching
Each template below runs about 30–45 seconds at a slightly faster speed. Paste one, replace the brackets and generate.
The surprising fact
The Golden Gate Bridge isn’t gold; it’s officially called International Orange. The color was supposed to be a temporary primer. But the architect loved how it stood out in the fog, so it stayed. Next time you see it, you’ll know.
The mini tutorial
Here’s how to [freeze the top row in Google Sheets] in five seconds. Click View. Click Freeze. Choose one row. Done. Follow for one spreadsheet trick a day.
The ranking
Ranking [fast food fries] from worst to best. Number three: [option], soggy by the time you get home. Number two: [option], great seasoning, but tiny portions. And number one… [option]. Fight me in the comments.
The loop ending
…and that’s why nobody has ever finished reading this sentence, because the moment you think it’s over…
A loop ending flows back into your first line so viewers replay the Short without noticing. Write your last line so it naturally leads into your hook.
Voice, speed and length guide for Shorts
| Shorts niche | Suggested voice | Speed | Script length |
|---|---|---|---|
| Fun facts and trivia | Curious, upbeat American voice | Slightly fast | 80–110 words |
| Reddit-style stories | Expressive storyteller voice | Slightly fast | 120–160 words |
| Tech and app tips | Crisp, neutral voice | Normal to slightly fast | 50–80 words |
| Motivation and quotes | Deep, slow narrator | Slightly slow | 40–70 words |
| Gaming clips | Casual, energetic voice | Fast | 40–80 words |
| Cooking and recipes | Warm, friendly voice | Normal | 60–90 words |
Word counts are approximate. Read your script aloud with a timer, or simply generate and check the clip length.
From script to published Short in YouTube Studio
- Generate the voicePaste your script, pick a voice, set the speed and download the MP3. Save the voice as a favorite so your next Short matches.
- Edit verticallyUse a 9:16 project in CapCut, VN, Premiere Pro or DaVinci Resolve. Place the voice first, then cut visuals to it. Add bold captions in the center third of the frame.
- ExportExport as MP4 in vertical format. Keep the voice clear and any music quiet underneath.
- UploadIn the YouTube app tap + then Create a Short and pick your video, or on desktop use the Create button in YouTube Studio and upload the vertical file. YouTube recognizes vertical videos of Shorts length as Shorts.
- Finish detailsAdd a title with your main keyword, check the altered or synthetic content setting if it applies, and publish.
Pacing and punctuation tips
- Hook in under eight words. “This bridge was never meant to be orange” beats a two-sentence setup.
- Control pauses. Use the pause buttons in Voice Effects to drop a real pause like
[break 1s]before a reveal. Punctuation shapes the rest: a comma gives a quick breath and a full stop a slightly longer one. - Spell numbers out. Write “nineteen thirty-seven” or “twenty-four hours” so the voice reads them naturally.
- Generate line by line for tight edits. Separate clips make it easy to trim gaps between sentences.
- Reuse the voice across your channel. If your long-form videos use one narrator, keep it for Shorts too. See our YouTube voiceover guide.
- Add a sound effect for the reveal. A short whoosh from the Sound Effects Generator adds energy without competing with the voice.
Posting Shorts every day?
Building an automated Shorts pipeline? The Speechma API starts from $9/month.
Frequently asked questions
Is the YouTube Shorts voice generator included in Speechma Pro?
Can I monetize Shorts that use an AI voice?
What is the best AI voice for YouTube Shorts?
How fast should a Shorts voiceover be?
Can I make Shorts voiceovers on my phone?
Do I need to label AI voices on YouTube?
Make better voiceovers, faster
- New voices and features the day they launch
- Script templates and tricks that make AI voices sound human
- Creator stories, community picks and early access