A voiceover for every upload, without booking a booth.
Scripts change up to the last minute, and re-recording a line means setting the mic back up. Generate the read instead: paste your script, pick a voice, and export audio you can drop straight onto the timeline.
No credit card · Real engines · The audio is yours
Cold open: the first fifteen seconds
I deleted forty thousand lines of code last week, and our app got faster.
Everyone tells you to write more tests. Nobody tells you when to stop.
By the end of this video you will know exactly which half of your codebase is dead weight. Let's get into it.
Grok Voice, persona Eve: a confident, characterful read that can hold a retention hook without sounding like a screen reader. When a line needs an acted cue, switch that line to Gemini Flash.
- ~1,500
- characters in a 90-second voiceover
- 30,000
- characters per pass, about a 30-minute script
- 5
- engines to audition for the same hook
What YouTube & Video actually needs.
Video scripts are never final. You catch a typo in the edit, a sponsor changes a line, the hook needs one more pass. Re-recording each time means setting up the mic, matching the room tone, and re-cutting. Generated voiceover lets you change a word and regenerate that line in seconds, with the same voice every time, so the audio keeps pace with the cut.
The cut is due tonight and the sponsor just reworded one line of the read. Your mic is packed away, the room tone will never match, and re-recording means re-cutting. All you actually need is the same voice saying eleven new words.
Real features, mapped to the job.
Every item here works today, or says plainly where it is still in progress.
Fast iteration on script changes
Change a line and regenerate just that line in seconds. The voice stays identical across takes, so you never re-match a room tone.
Cue-directed reads
Add bracketed [excited] or [deadpan] cues so a hook lands the way you wrote it. Gemini Flash performs the direction.
Pick by measured speed
The open benchmark publishes real wall-clock latency, so when you need a fast turnaround you can pick the engine that returns audio quickest.
Export and drop on the timeline
Download MP3 or WAV with commercial rights and no watermark, ready to place under your cut.
How it goes, step by step.
Step 1: Paste your script
Drop the voiceover script into Text to Speech, up to 30,000 characters per generation.
Step 2: Choose a voice and cues
Pick a voice and add bracketed cues where the read needs energy or restraint.
Step 3: Generate and review
Hear it live in the console, then regenerate any line you want to change.
Step 4: Export to your editor
Export MP3 or WAV and place it on the timeline. Commercial rights, no watermark.
Publishing AI voiceover on YouTube, by the actual rules.
Before you put an AI voice for YouTube videos behind an upload, three questions worth settling. The answers below come from YouTube's own policy pages, linked so you can check us.
The disclosure rule is narrower than the rumor
YouTube requires a disclosure when realistic AI content could mislead: a real person appearing to say something they did not, or real events altered. A generated voiceover narrating your own footage is not that, and YouTube states that disclosing AI use does not limit a video's reach or its eligibility to earn. When in doubt, tick the disclosure in the upload flow; it costs nothing.
Monetization judges the channel, not the voice
YouTube's monetization policies do not ban synthetic narration. What they reject is inauthentic content: mass-produced, templated videos with nothing original added. An AI-voiced channel earns when the research, writing, and editing are yours. The voiceover is a production choice; originality is the policy.
Shorts and long-form want different reads
Used as an AI voice generator for YouTube Shorts, pace is the job: generate the hook line on its own, audition it at full energy, and cut anything that takes a breath before the point. Long-form is the opposite: a steadier read, with chapter breaks scripted as natural pauses so your YouTube chapters land on clean audio boundaries.
Both policy pages above were checked live on June 11, 2026. YouTube revises them; the links are the source of truth.
Start with Grok Voice.
Grok Voice offers five English personas with a confident, characterful read that suits narration and hooks. For acted cues, switch to Gemini Flash.
xAI voice with 5 personas. Plain read, ignores cues.
- Quality Elo
- 1197
- Latency
- 2444 ms (measured 2026-06-10)
- Languages
- 1
- Rights
- Commercial use; outputs are yours
“Before we get into it, here is the one thing nobody tells you about starting out.”
The honest answers.
What Cantari can and cannot do for youtube & video today, in plain language.
Is the audio real or a canned demo?
Can I use this for monetized videos?
How fast is a render?
Try Cantari for youtube & video.
Free to start, no credit meter. Open the studio and hear it for yourself.