A free AI voice generator turns typed text into spoken narration, so you can make a voiceover for a YouTube video, a Short or a TikTok without recording it yourself. Synthvids has one you can use right now: type a line, pick a studio voice, listen, and download the MP3.
This guide shows how to make an AI voiceover with it, how to clone your own voice, and how to write text that sounds natural when it's read aloud.
Open the free AI voice generator
What the free text to speech tool gives you
- Six studio voices to try: Walter, Brian, Emmanuel, Abigail, Meera and Marisol.
- Up to 300 characters a run, a sentence or two of narration.
- An MP3 download of every clip, ready for any video editor.
- A few free runs a day with a free Synthvids account. No card needed.
Under the Synthvids Terms you own the audio you generate, so you can use it in your own videos.
How to make an AI voiceover for YouTube
- Open the AI voice generator and sign up or sign in.
- Type the line you want spoken, up to 300 characters.
- Pick a voice. Try two or three; the same line can feel very different in each.
- Press Generate and listen. The first run of the day can take a minute while the voice server wakes up.
- Download the MP3 and drop it into your editor under your video.
For a longer voiceover, generate it a few lines at a time and line the clips up in your editor.
Free AI voice cloning: narrate in your own voice
Want the voiceover in your own voice, without reading every script? The same page clones your voice:
- Sign in and confirm the voice is yours, or that you have permission to clone it.
- Read a short passage aloud, about 30 seconds, in a quiet room at your normal pace.
- Type any script, up to 1,000 characters, and hear it spoken in your cloned voice.
Clone runs use SynthCredits from your plan: 20 credits per minute of audio, charged by the length of what's generated. The same clone can narrate your Synthvids videos.
How to write text that sounds natural in text to speech
AI narration sounds best when the text is written for the ear, not the page:
- Short sentences. One idea per sentence is easier to follow by ear.
- Use punctuation for pauses. Commas and full stops give the voice room to breathe.
- Write numbers the way you'd say them when they could be read more than one way, like "nineteen twenty-nine" for a year.
- Read it aloud yourself first. If you stumble, the voice probably will too.
Don't have a script yet? The free YouTube script generator writes one about a minute long, made to be read aloud. See how to write a YouTube Shorts script.
Looking for an ElevenLabs alternative?
If you're comparing AI voice tools for video narration, try the voices here first: all you need is a free account, and every clip downloads as an MP3. On a Synthvids plan, the same voices, 20 in all, or your cloned voice narrate whole videos, with the script, AI scenes, captions and publishing in the same place, so you don't need a separate voice subscription to make narrated videos.
Synthvids is not affiliated with or endorsed by ElevenLabs. ElevenLabs is a trademark of its owner.
From voiceover to finished video
The voice generator is one step of what Synthvids does. On a plan, Synthvids writes the script, narrates it in a studio voice or your own cloned voice, makes original AI scenes for every line, adds captions and music, and posts to YouTube or TikTok. Every scene stays editable, and you can plan the whole video first in the AI storyboard and pre-render editor.
FAQ
Is this AI voice generator really free?
Yes. With a free Synthvids account you get a few text to speech runs a day in the studio voices, with MP3 download. Voice cloning uses credits from a plan.
Can I use the AI voice in my YouTube videos?
Yes. Under the Synthvids Terms (section 5.1) you own the audio you generate, so you can use it in your own videos.
How do I download the voiceover as an MP3?
Every clip you generate has a download button. The file is an MP3.
How long does voice cloning take to set up?
About 30 seconds of reading. Read the passage on the page, and your cloned voice is ready to speak any script you type.
Why is there a daily limit?
Each run costs us real voice generation, so the free runs are capped per day.
Try it
Open the free AI voice generator, or see the plans to have Synthvids narrate whole videos.