Yuki AI Voice
Japanese, warm. Type your text below and generate natural speech with Yuki — then download the MP3.
Speech studio
29 voices · 18 languages
Examples
Hear Yuki on real scripts
Each clip below was generated with a free-tier voice on the script shown. Play one to hear how this kind of writing lands, or load the script into the generator above and hear Yuki read it.
YouTube intro
Opens a video without the "hey guys, welcome back" throat-clearing.
“Three years ago, this cost four thousand dollars and a studio. Today it costs nothing and takes about a minute. In this video I'll show you exactly how — no jargon, no upsell, and every step is one you can copy while you watch.”
YouTube outro
Closes the loop and asks for one thing, not four.
“That's the whole method. If it worked for you, the next video takes it further — same tools, bigger project. And if it didn't, tell me where it broke. I read every comment, and half of these videos exist because someone got stuck.”
Course lesson
Module opener that tells learners what they will be able to do.
“By the end of this lesson you'll be able to read a balance sheet and say, in one sentence, whether the company can pay its bills next month. We'll use one real example throughout, and you'll do the last one yourself before we check it together.”
About the Yuki voice
Yuki reads Japanese with the gentle, level intonation of ordinary speech rather than the pitched delivery of broadcast announcement. Japanese punishes a foreign voice more than most languages — pitch accent distinguishes words outright — which is why this is a voice trained on Japanese and not an English voice reading kana.
Why a Japanese voice, and not an English one
Yuki was trained on Japanese, which matters more than it sounds like it should. An English voice pointed at Japanese text will get the individual sounds roughly right and the rhythm completely wrong — stress in the wrong places, vowel lengths flattened, the melody of the sentence replaced with an English one. It is intelligible and it is immediately, unmistakably foreign.
Japanese is also read here by Aoi, Haruto — worth previewing side by side, since the difference between two voices in the same language is usually more useful than the difference between two languages.
The engine behind this voice
Kokoro is an 82-million-parameter open-weights model under Apache-2.0 — the cheapest capable engine available by roughly an order of magnitude, which is what makes this tier free at all. It takes up to 5,000 characters per request, adjusts from 0.75× to 1.5×, and returns MP3 or WAV. Longer text is split at sentence boundaries and joined back into one file.
More about Kokoro TTS →What Yuki costs
Nothing. Yuki is a free-tier voice: 5,000 characters a day without an account, 10,000 with a free one, and no credit card at any point. Audio downloads as MP3 or WAV and carries a commercial licence, so monetised videos and client work are both fine.
The daily allowance is stated plainly here because several sites in this category advertise "unlimited" and enforce a monthly cap. What is written above is what the server enforces.
Best for
What Yuki is good for
- Japanese YouTube and social voiceover
- Japanese e-learning and language-practice material
- Product, app and service explanation in Japanese
- Japanese scripts mixing kanji, kana and Latin-script product names
Limits
Where Yuki is the wrong choice
Japanese is graded C+ in the voice pack — the best-graded non-English family here, but not native-recording quality. Latin-script words inside Japanese text are the weak spot: product names in romaji often come out mispronounced, and writing them in katakana fixes it.
How it works
How to use Yuki
- 1
Paste your text
Type or paste the script you want Yuki to read. Longer text is split into parts automatically and joined back into one file.
- 2
Preview Yuki
The generator above already has this voice selected. Play the sample, or generate a sentence of your own text to hear it on your writing.
- 3
Generate and download
Audio comes back in seconds as MP3 or WAV, with a commercial licence on every tier — including the free one.
Questions