【Creating In-House Training Materials】The Best Free Text-to-Speech Software for e-Learning!

Nov. 12, 2026

【Creating In-House Training Materials】The Best Free Text-to-Speech Software for e-Learning!

Opportunities to create slides using PowerPoint and videos for seminars are increasing as part of in-house training.
Along with this, there are more situations where people want to add narration to slides and videos. These days, presentations often include narration as well.

However,

  • I'm embarrassed to use my own voice
  • Other people have turned me down
  • It's not worth hiring a voice actor
  • We can't afford to hire a voice actor

There are always concerns when it comes to adding narration.

In these cases, text-to-speech services and speech synthesis software are recommended.

What is text-to-speech software?
It is software that converts documents such as text and characters into audio and reads them aloud.

In this blog, we'll introduce speech synthesis software for e-learning materials that you can use for free and that is recommended for creating in-house training materials.

Recommended speech synthesis software for narration

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Recent advances in AI technology have brought many amazing speech synthesis applications to the world.

However, when it comes to "Can it be used for work?", the terms can be complicated or the price can be high, so many people end up not using them.

That's why we recommend Ondoku!

Ondoku

Ondoku is easy to use for

  • Creating in-house training materials
  • e-learning materials
  • Using with PowerPoint
  • In-house use
  • Creating audio

and stands out from other speech synthesis software for its ease of use in any situation.

In fact, it is already used in many in-house training materials, presentations, and e-learning courses.

It is also popular for academic conference presentations.

Why Ondoku is recommended for in-house training materials and e-learning

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When you try to use text-to-speech services or speech synthesis software for work, various restrictions often apply because it is considered "commercial use."

In addition, commercial use may require you to purchase a separate license...

But with Ondoku, you don't have to worry about that.

Even with the free plan, Ondoku can be used to narrate in-house training materials.

Specifically:

Available for free (credit attribution required)

  • Use in in-house training and video manuals.
  • Use on corporate websites and social media accounts operated by companies.
  • Use Ondoku audio in lectures and research presentations.
    Example: Giving a lecture using Ondoku

Available with a paid plan (Business Plan)

  • Distributing or selling downloadable content that uses Ondoku audio.
    Example: Distributing or selling content on platforms such as Podcast or Voicy (including free distribution)
  • Selling teaching materials and other content that uses Ondoku audio.
    Example: Selling cram school materials

As you can see, commercial and corporate use are explicitly permitted.

For details, please also see this article.

What you can do with Ondoku: commercial (business) use and prohibited activities.

What you can do with Ondoku: commercial (business) use and prohibited activities

Commercial (business) use is permitted with Ondoku. Regardless of whether you are an individual or a corporation, use for the purpose of obtaining monetary or other benefits, directly or indirectly, is considered commercial use. However, please note that certain activities are prohibited with Ondoku. This article explains what you can and cannot do with Ondoku...

Another great benefit is that companies can use one account on up to 10 devices.

"Is this use permitted?" "I'd like something that's free and easy to use."

Ondoku is a text-to-speech service that meets these needs.

You can also add audio to PowerPoint, of course. For details, please refer to the blog below.

Add audio files to slides and presentations in PowerPoint and other software. Recommended software and how to do it

Add audio files to slides and presentations in PowerPoint and other software. Recommended software and how to do it

Adding audio to slides in PowerPoint and other software, in addition to illustrations and photos, can make presentations easier to understand. This article introduces recommended software and explains how to add audio to create engaging slides using text-to-speech software...

What people think of Ondoku for in-house training, presentations, and e-learning

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Ondoku has received many comments from people who have used it at their companies and for work.

Here are a few comments from our customers.

I think it's a very easy-to-use and excellent service.

I used it for a presentation. Now that the presentation is over, I'm canceling my subscription. It's a very good piece of software, and I'd like to use it again.

I'm satisfied with the quality and the value for money.

Most of the people who listened to the script read aloud had positive feedback.

I would definitely like to use it again for my next project. This is just my opinion as a user, but I think it would be an even better service if the intonation could be adjusted in a little more detail.

I used it for an in-house presentation, and the people who listened were very impressed.

I found it very easy to use and a great service. There were a few unusual pronunciations, but overall it was good. It would be perfect with more natural intonation and emphasis.

The price and features were very reasonable.

I finished creating new materials. It was very easy to use. Thank you. I'll be sure to include the required credit!

Try Ondoku now

With Ondoku, you can create audio for free without registering for an account.

You can find out right away what kind of narration it can produce and whether it can create narration at the level you're looking for.

For Japanese, Ondoku lets you choose from eight voices for your narration. It also supports English and other foreign languages, and can create narration with native pronunciation.

There are also blog articles and YouTube videos with sample audio, so be sure to check them out!

Try 16 voices from Ondoku text-to-speech software for free. Change the impression by adjusting pitch

Try 16 voices from Ondoku text-to-speech software for free. Change the impression by adjusting pitch

Ondoku offers 16 Japanese voices, including both male and female voices. We have made it possible to listen to samples of eight commonly used Japanese voices, as well as versions of each voice with adjusted pitch.

Why not try using Ondoku for in-house training, presentations, and e-learning?

■ AI voice synthesis software "Ondoku"

"Ondoku" is an online text-to-speech tool that can be used with no initial costs.

  • Supports 81 languages and regions, 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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