Haruto AI Voice
Japanese, steady. Type your text below and generate natural speech with Haruto — then download the MP3.
Speech studio
29 voices · 18 languages
Examples
Hear Haruto 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 Haruto read it.
Server announcement
Short spoken notice for a Discord or community channel.
“Quick one, everyone. The game night moved to Saturday at eight, the invite link in the pinned message still works, and whoever keeps renaming the voice channel — we know it's you, and it's very funny, please stop.”
Audiobook passage
Narrative prose, to hear how a voice handles description and pace.
“The house had been empty for eleven years, and it had the particular stillness of a place that has stopped expecting anyone. Dust lay on the banister in a way that suggested nobody had run a hand along it in a very long time. She did, once, on the way up, and felt slightly guilty about it.”
Podcast opener
Cold open that sets up the episode without a sponsor read.
“This week: a bank that lost four hundred million dollars because of a rounding error, the intern who found it, and the eight months it took anyone to believe her. It's a story about arithmetic, and it is somehow also a story about how hard it is to be right early.”
About the Haruto voice
Haruto is the steady Japanese male voice — even-paced, unhurried, and consistent across a long read. He suits explanation and instruction, and is the natural counterpart when a Japanese script needs a second speaker with a clearly different register.
Why a Japanese voice, and not an English one
Haruto 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 Yuki, Aoi — 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 Haruto costs
Nothing. Haruto 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 Haruto is good for
- Japanese tutorials, instructions and technical narration
- Corporate and product video in Japanese
- Longer Japanese explainers where consistency matters
- Dialogue scripts paired with Yuki or Aoi
Limits
Where Haruto is the wrong choice
Graded C− in the voice pack, a step below the two female Japanese voices, and it shows on longer reads as a slightly thinner tone. Fine for explanation; not the choice for a Japanese audiobook.
How it works
How to use Haruto
- 1
Paste your text
Type or paste the script you want Haruto to read. Longer text is split into parts automatically and joined back into one file.
- 2
Preview Haruto
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