How to use the text-to-speech software Ondoku, registration method, and useful features
June 20, 2025
In this article, we will explain how to use the text-to-speech software 『Ondoku』.
- I want to listen to characters/text in audio
- I want to download in mp3
In such cases, text-to-speech software is recommended.
What is text-to-speech software? Reasons why 『Ondoku』 is recommended
Text-to-speech software is software that reads out characters and text in a machine voice.
There are many types of text-to-speech software.
When you search for text-to-speech software on the internet, many types of software appear, don't they?
For those who don't know left from right, it's hard to tell which software is good.
They come with so many features that you might not know if you can master them all, and the prices vary from free to paid.
Sound quality also varies greatly depending on the software.
Some have voices that sound truly like robots, while others are close to human speech.
- A voice that is as natural as possible is better
- I want to download mp3 files
- The usage should be simple and easy to understand
- I only want to use a small amount, so I'm hesitant to pay a lot of money
For you, we recommend 『Ondoku』.
『Ondoku』 is a reading service that uses the latest AI to create realistic and easy-to-hear audio.
There is no need for tedious software downloads or installations, and it can be used on an internet website.
And 『Ondoku』 can be used for free!
Now, let's take a look at the detailed usage of such 『Ondoku』!
Let's try using Ondoku
Ondoku can be used for free for up to 1,000 characters per month without registering as a member.
The usage is very easy.
1. Access the Ondoku website
Open the 『Ondoku』 page from here.
2. Input text

Input or copy and paste the text you want to be read aloud into the text box.
3. Set the voice type
Set the voice type (female, male, child, etc.).

You can listen to samples of Japanese audio in this article.
Also, reading in foreign languages is possible.
【Ondoku】Listen to voice types and sample audio for supported languages | Text-to-speech software Ondoku
Here, we will introduce the supported languages and sample audio for Ondoku.
Pitch and speed can also be set according to your preference.

4. Reading aloud
When you click the read button, Ondoku will read the characters you entered.

The reading results are played automatically.
It is also possible to play/stop with the on-screen audio player, or rewind and replay.
The reading aloud by 『Ondoku』 is now complete!
It is very easy, so it is perfect if your requirement is simply wanting to use text-to-speech software!
However, without registering as a member, it cannot be said that you are truly mastering Ondoku's features.
Without being a free member of Ondoku:
- Additional reading of 5,000 characters
- Checking reading history
- Checking the remaining number of characters
- Support when an error occurs
- Google Chrome extension
- Embedding audio into blogs, etc. and more
cannot be used.
By registering as a free member, the above features will become available.
How to register as a member for Ondoku

To register as a member for 『Ondoku』, first click the free registration button in the upper right.

Then,
- Your own email address
- Desired password
- Check 'Agree to Terms of Use' and press the free registration button.
When you press the free registration button, an email will be sent to your email address from Ondoku.
An activation URL will be sent in the email.
Member registration is completed by clicking the URL in this email.
If you do not receive the email, please check your spam folder or domain settings (@ondoku3.com).
Once registered, you can check the remaining character count from your history.
In addition, previously read audio can be shared on blogs or SNS, and mp3 files can be downloaded at any time.
I want to adjust the pause in reading aloud
When reading audio, there are cases where you want to have a bit more of a pause so it sounds more natural.
This is because when reading with Ondoku, the pause in reading, or rather a breath, feels slightly insufficient.
Therefore, we recommend utilizing SSML (using code called speak break).
What is SSML?
SSML is a markup language for audio. HTML is famous as another markup language.
You might think "Markup something invisible?", but you can control the speech of machine voices.
By using these two codes, the convenience of Ondoku changes dramatically.
Detailed usage and tips are introduced here, so please make use of them!
Why not make convenient use of Ondoku?
Ondoku is being updated today as well so that it can be the easiest-to-use text-to-speech software for you.
Thanks to that, many people
- Easy to use
- The way of speaking is natural and easy to hear, etc.
have reviewed it, and it is very well received.
Recently, we received this comment on YouTube. We're happy!

Summary of reviews and word-of-mouth for text-to-speech software [Ondoku]
Please take this opportunity to try using Ondoku, the very easy-to-use text-to-speech software!
■ AI voice synthesis software "Ondoku"
"Ondoku" is an online text-to-speech tool that can be used with no initial costs.
- Supports approximately 50 languages, including Japanese, English, Chinese, Korean, Spanish, French, and German
- Available from both PC and smartphone
- Suitable for business, education, entertainment, etc.
- No installation required, can be used immediately from your browser
- Supports reading from images
To use it, simply enter text or upload a file on the site. A natural-sounding audio file will be generated within seconds. You can use voice synthesis up to 5,000 characters for free, so please give it a try.
Email: ondoku3.com@gmail.com
"Ondoku" is a Text-to-Speech service that anyone can use for free without installation. If you register for free, you can get up to 5000 characters for free each month. Register now for free
