How to Credit Ondoku: Practical Examples and Precautions.

Aug. 7, 2026

How to Credit Ondoku: Practical Examples and Precautions.

Hello, and thank you for always using Ondoku.

At Ondoku, you can use the text-to-speech service for free.

It supports not only personal use but also corporate and commercial use.

Specific examples of use include:

  • YouTube narration audio
  • Film contests
  • English listening tests
  • Internal training videos
  • Training audio for foreign workers
  • Machine operation guidance

Ondoku is chosen for many such scenarios.

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You are more than welcome to use Ondoku for free.
However, when using it for commercial purposes for free, credit notation is mandatory. Please do not forget to include it.
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A paid plan is mandatory for use in cases where credit notation is not possible (such as audio guidance, etc.).

The Business Plan is mandatory for contract and outsourced work, regardless of whether credit is given or not.

What you can do with Ondoku. About commercial use (business use) and prohibited items.

What you can do with Ondoku. About commercial use (business use) and prohibited items.

Commercial use (business use) is possible with Ondoku. Regardless of whether you are an individual or a corporation, use for the purpose of obtaining direct or indirect profit, such as money, is considered commercial use. However, please note that Ondoku has established prohibited acts. This time, we will cover what you can and cannot do with Ondoku...

How to write Ondoku credit notation

Please provide credit notation for Ondoku as follows.

If you create audio with Ondoku for your own private enjoyment and do not release it to the public, credit notation is not required.

For YouTube, please display it by embedding it in the description box or within the video itself.
*If you embed a YouTube video on your own website, etc., and there is no credit notation within the video,
please include credit not only in the description box but also on the website, or at the top or bottom of the video embedded on your website.

When embedding within a video, please display it in a generally visible size. Notation at a speed or size that is difficult for the human eye to see is not permitted.

When using it in slides, please include credit notation on the title slide, the slide where the audio is played, or the final summary slide.

When embedding in games or apps, please include credit notation so that users can understand that "this is the voice of Ondoku" when the audio is used.

For school listening tests and school broadcasts, the method of credit notation is different. Please check here.

Image explanation of credit notation examples when using Ondoku for listening tests in educational institutions such as public schools and school corporations

Image explanation of credit notation examples when using Ondoku for listening tests in educational institutions such as public schools and school corporations

With Ondoku, preparing for various listening tests in English, Chinese, and more is easy! here, we will explain in detail the rules for how educational institutions such as public schools and school corporations should provide credit notation.

Explaining the rules for using \

Explaining the rules for using "Ondoku" for free in school broadcasts at educational institutions such as public schools and school corporations

Using it for free for school broadcasts: You can use Ondoku audio for free if you provide credit notation. We will specifically introduce how to provide credit notation.

No matter the scene of use,

  • Placement in a location that does not catch the user's eye
  • Credit notation that is too small or too fast for users to understand

is not permitted.

  • Audio guidance
  • Phone handling
  • Use in IVR equipment (in-house)
  • Disaster drills
  • Apps where credit notation is not possible due to specifications

In situations where credit notation is not possible, such as those above, please be sure to subscribe to a paid plan.

Also, please continue to subscribe to a paid plan during the period the audio is in use.

Cases where credit notation is not possible, or methods that can only be used with a Business Plan, require a Business Plan contract. For details, please check "Detailed information on the Business Plan."

Detailed information on the Business Plan for the text-to-speech software Ondoku. Features, pricing, etc.

Detailed information on the Business Plan for the text-to-speech software Ondoku. Features, pricing, etc.

By contracting a Business Plan, some usage methods otherwise prohibited as prohibited acts will be exempted. We will provide details on what you can do with the Ondoku Business Plan.

When using Ondoku, please be sure to read the Terms of Service and follow the rules.

What is credit notation?

Credit notation refers to displaying the author's name, the title of the work, etc.

Please display it so that it is clear to anyone seeing the audio created with Ondoku that "this was created with Ondoku."

About Ondoku credit notation

Ondoku is a service that can be used for commercial purposes for free, but

when using Ondoku for free, we ask that customers always provide credit notation.

By having you provide credit, we hope to let many people know about the existence of Ondoku.

If you are using it for free but have not provided credit notation, it constitutes a violation of the Terms of Service.

Please note that if you violate the Terms of Service, we will take actions such as suspending your use of Ondoku, freezing your account, stopping the use of the audio, and in malicious cases, taking legal measures.

Ondoku continues its service thanks to the support of many users.

Ondoku's service will evolve further by receiving requests and feedback on what you would like us to do.

Ondoku will continue to move toward the future.

We appreciate your continued support so that we can maintain the service in the future.

■ 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.

Text-to-speech software "Ondoku" can read out 5000 characters every month with AI voice for free. You can easily download MP3s and commercial use is also possible. If you sign up for free, you can convert up to 5,000 characters per month for free from text to speech. Try Ondoku now.
HP: ondoku3.com
Email: ondoku3.com@gmail.com
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