AI Reels Voice Generator — Written To The Second
Thirty seconds is seventy words, and almost every Reel voiceover that does not work is simply too many. Give it the idea and the runtime, get a script written to length, and hear it before you cut.
An AI Reels voice generator produces the spoken voiceover for short vertical videos — Instagram Reels, YouTube Shorts, TikTok — from written text. The thing that makes short form different from any other voiceover job is length discipline: at around 150 words a minute, a 30-second Reel holds about 70 words, and going over forces a rushed read that viewers drop out of. Here you can give it a target runtime and an idea, and the script is written to that word count before it is spoken.
15 free credits on signup — enough for one complete track with cover art. No card required.
Eight Reel Formats And Their Word Counts
Short form is mostly arithmetic. Knowing the format tells you the runtime, and the runtime tells you how many words you are allowed.
Hook & listicle
~70 wordsThree things, one sentence each, number stated in the first line. The most reliable short-form shape there is.
Tutorial & how-to
~150 wordsClear steps at sixty seconds. The one format where going slightly longer is forgiven.
Before & after
~35 wordsBarely any words at all. Name the problem, name the result, and let the footage carry the middle.
Tip of the day
~35 wordsOne idea, fifteen seconds, no preamble. Works best as a repeatable series with the same voice.
Product feature
~70 wordsTwo or three features, each named while it is on screen. Written for sound-off viewing with captions.
Story time
~200 wordsNinety seconds, steady neutral delivery. Plain reading is what makes a story sound true.
Behind the scenes
~70 wordsWarm and conversational, at a pace that matches someone walking and talking.
Promo & call to action
~35 wordsThe offer, the deadline, where to go. Nothing else fits and nothing else is needed.
How to Make a Reels Voiceover in 3 Steps
Count the words before you write them. That is the whole discipline.
Decide the runtime, then the word count
Fifteen seconds is 35 words. Thirty is 70. Sixty is 150. Write to the number before you write the sentences — short form punishes overwriting harder than anything else.
Put the whole point in the first line
You have about two seconds. No greeting, no channel intro, no "in this video" — open on the claim, the number or the mistake.
Generate, time it, add captions
Play it against a stopwatch. Download the WAV on a paid plan, drop it into CapCut or InShot, and burn in captions for the sound-off viewers.
The First Two Seconds Are The Whole Video
Short-form scripts written like long-form scripts always open with a warm-up. In a Reel that warm-up is the entire window you had, and the viewer is gone before the point arrives.
“Hey guys, welcome back, so today I wanted to talk to you a little bit about something I have been getting a lot of questions about recently, which is houseplants.”
“Most houseplants die from repotting, not neglect. Three mistakes.”
“So in this video I am going to be showing you a few different tips that might help you out when it comes to taking better photos on your phone.”
“Your phone has a setting that fixes low-light photos. Almost nobody turns it on.”
“I just wanted to come on here and share a quick little update about something we have got coming up soon that I think you might be interested in.”
“We open Saturday at nine. Everything twenty percent off, one day only.”
Original Audio Is Worth Something
Borrowing a trending sound puts your video in a feed alongside thousands of identical ones, and none of it accrues to you. A voiceover makes the Reel original audio — it can be reused by other accounts, it is attributed to you, and over a few dozen videos it becomes something people recognise before they read the handle. That only works if the voice stays the same, which is the one thing a generated voice is guaranteed to do.
- Scripts written to a target runtime rather than trimmed down afterwards
- Original audio credited to your account, not a borrowed trending sound
- The same recognisable voice across every video you post
- Uncompressed WAV, so Instagram is not compressing a compressed file
- Honest limits: no TikTok platform voice, no video generation, no cloning
Reel Scripts, Written To Length
Tell it the seconds and it writes to the word count.
30-second listicle
“A seventy-word Reel script on three mistakes people make repotting houseplants, number stated in the first line, one mistake per sentence, no introduction”
15-second tip
“A thirty-five word tip about the phone camera setting that fixes low-light photos, opening on the fact that almost nobody turns it on”
60-second tutorial
“A hundred and fifty word tutorial on making cold brew coffee at home, four steps, plain language, ending on the one thing people get wrong about the ratio”
Before and after
“A thirty-five word script for a room renovation reveal — name the problem, name the result, leave the middle to the footage”
Story time
“A two hundred word story about buying a flat and finding a bricked-up doorway behind the wallpaper, told plainly in first person, steady and neutral”
Promo
“A thirty-five word promo Reel for a bookshop opening Saturday at nine, twenty percent off for one day, ending on the street name”
Who Makes Reels Voiceovers
Tips & education accounts
Repeatable short formats in one recognisable voice, several scripts per generation.
Small brands
Product and promo Reels with commercial rights included on paid plans.
Creators without a mic
Publish narrated short form without recording, or hearing your own voice back.
Faceless accounts
Story and fact content in a steady neutral read that makes it sound true.
What You Get
24 kHz WAV
16-bit mono, into CapCut, InShot, VN or Premiere without conversion.
The script, saved
Cut six words to make the runtime and generate again in a minute.
Nine voices
Bright, direct, warm or neutral — pick one and keep it across the account.
Share link
Send a read to a client or collaborator before you download anything.
Frequently Asked Questions
Mostly about length and trending audio, which is what short form actually turns on.
How many words is a Reel voiceover?
Work backwards from the runtime at roughly 150 words a minute. A 15-second Reel is about 35 words. A 30-second Reel is about 70. A 60-second one is about 150, and 90 seconds is around 200. Almost every underperforming Reel voiceover is simply too many words for the runtime, which forces the read to speed up and makes it exhausting to watch. Write to the count first, then generate and time it.
Is this the TikTok voice?
No. The specific narrator voice people associate with TikTok is that platform’s own text-to-speech and it is not available outside it — no third-party tool has it, whatever they imply. These are nine different voices, and for a lot of creators that is now an advantage rather than a compromise, because the platform voice is so recognisable that it makes a video sound like every other video.
Does using AI voiceover instead of a trending sound hurt reach?
It is a genuine trade-off rather than a rule. Trending audio can carry a video into a sound-based feed, but you are one of thousands using it and your video is not distinctive. A voiceover makes your Reel original audio, which means it can be used by others and builds something recognisable across your account. A common approach is a voiceover for content that has to explain something, and trending audio for content that does not.
Do I have to write the script?
No. Give it the idea and the runtime — "a 30-second Reel on three mistakes people make repotting houseplants, punchy, one per sentence" — and the script gets written to that length before it is spoken. That matters more in short form than anywhere else, because writing to 70 words is a specific skill and most people overshoot it badly on the first try.
Should I add captions as well?
Yes. A large share of Reels are watched with the sound off, so a voiceover with no on-screen text is invisible to those viewers. Treat the voiceover as what makes the video work for people listening, and burned-in captions as what makes it work for everyone else. Instagram will auto-generate captions, though they are worth checking against your script for names and brand terms.
Is it free, and how many Reels does a plan cover?
15 credits free on signup with no card, and a voiceover costs 10 credits, so you get one complete generation to test. Downloading needs a paid plan from $15 a month for 250 credits, which is 25 generations. Since a single 4,000-character pass covers roughly eleven 30-second Reels’ worth of words, you can generate several scripts at once and split them in your editor if you want to stretch it further.
What file do I get, and does it work in CapCut or InShot?
A 16-bit mono WAV at 24 kHz. It imports into CapCut, InShot, VN, Premiere and Resolve without conversion. Uncompressed is worth having even for short form, because Instagram compresses on upload and you do not want that happening to an already-compressed file — that is where thin, hissy-sounding Reel audio comes from.
Which voice works best for Reels?
Nova, most of the time — bright and energetic, which suits a fast hook and holds attention through a short read. Ash is clear and direct for tips and how-to content where the information is the point. Coral is warm and works for personal and lifestyle accounts. Echo is steady and neutral, which is the register story and fact accounts use. Pick one and keep it, because a recognisable voice is a large part of how people notice they have seen your account before.
More Short-Form & Voice Tools
Same studio, same credits — the rest of the post covered.
Seventy Words. Thirty Seconds. Go.
Give it the idea and the runtime, and get a script written to fit. Free to start — 15 credits on signup, no card required.