Create free video narration using machine voice! Explains how to use recommended AI speech-to-speech apps and software

I want to easily create YouTube video narration using machine voice!

Are you worried about what to do about narration when creating videos for YouTube or social media ?

In fact, by using the latest AI apps and software, anyone can easily create high-quality video narration using machine voice!

There are also free AI apps and software available, so you can improve the quality of your videos without spending a penny.

This article will explain in detail how to use machine voice to narrate your YouTube videos .

We will also explain how to actually use free AI reading apps and software , so why not use this article as a reference to add machine-voice narration to your YouTube videos?

[Free] Recommended AI apps for creating video narration with machine voice

If you want to add machine-voice narration to videos on YouTube or social media , we recommend the AI app "Ondoku" !

"Ondoku" is a text-to-speech app that uses the latest voice synthesis AI to create video narration.

It's a web app that you use in your browser, so you can start using it right away without any installation required !

Using the latest AI, you can create easy-to-listen voice narration that is completely different from previous machine voices!

What's more, "Ondoku" is free!

It can read out 5,000 characters for free , so you can complete the narration for your YouTube videos for free .

If you are looking for a machine-voice reading software or app, we recommend "Ondoku."

Why not try using Ondoku 's AI machine voice to read out the narration of videos on YouTube or social media for free?

[Free] How to create a robotic voice narration for YouTube videos

I want to create a narration using a machine voice! Is it easy?

First, let's explain how to create narration for YouTube videos using machine voice.

Anyone can easily create a video, so you can feel at ease even if it's your first time making one.

1. Write a script to be read aloud by a machine voice

First, we create a script text to be read aloud by AI machine voice, tailored to the purpose of the video, such as entertainment video, explanatory video, or corporate promotional/branding video.

When writing a script, it is recommended to keep in mind the length of the video .

When read aloud by AI machine voice,

• 2,000 characters: Approximately 5 minutes
• 4,000 characters: Approximately 10 minutes

The length will be.

Especially for entertainment videos or corporate promotional videos , it is recommended to make the video short, up to around 5 minutes, so that viewers can maintain their attention .

If you can't think of anything to write in the script, we recommend speaking what you want to include in the video and typing it into your PC or smartphone.

You can use any software to write the script text, such as Notepad, Microsoft Office, or Libre Office, as long as it allows you to write text.

Key points for creating a script to read aloud in "Ondoku"

The key point when writing a script text to be read by Ondoku 's AI machine voice is to include a period (.) at the end of the sentence .

The AI machine voice of "Ondoku" reads with a pause between periods, allowing for a breather.

By adding a period, you can create an AI machine voice that is easy to listen to and natural.

How to adjust pauses and blank times when reading from a text using Ondoku [2 ways] | Ondoku Text-to-Speech Software

One of the needs of Ondoku users is "I want to leave a little more space between words." If you want to adjust the "space" to leave a little more space between words, there are two ways to do it: 1. Punctuation 2. SSML.

2. [Free] Read out the narration of YouTube videos with "Ondoku"

Once the script text is ready, we use the AI reading app "Ondoku" to create the narration audio for the YouTube video .

Once you open the "Ondoku" homepage, paste the script text you created into the text box.

Select the language and audio.

With "Ondoku," you can choose from a wide range of AI machine voices, including female, male, and child.

For example, Japanese can be read aloud using 16 different AI machine voices.

All of the voices sound so realistic you wouldn't believe they were machine-generated!

You can listen to the audio on this page, so please take a look.

Try out 16 voices from the text-to-speech software Ondoku for free. Change your impression by changing the pitch | Text-to-speech software Ondoku

Ondoku has 16 different Japanese voices, including both male and female voices. You can also listen to 8 commonly used Japanese voices and the voices with the pitch adjusted.

With "Ondoku" you can also set the pitch and reading speed of the AI machine voice.

At first, it's OK to leave it at the default settings.

You're now ready to go.

Click the "Read Aloud" button to start creating your narration voice !

The reading process will complete quickly, so just keep the screen open and wait.

Once the AI reading of the narration audio is complete, the screen will change to show the audio player.

Listen to the audio and if there are no problems, click "Download" to save the file.

A convenient way to save narration audio for "Ondoku"

Save narration audio in WAV format

If you press "Download" on the "Ondoku" homepage, the audio file will be saved in MP3 format .

You can also save audio files in WAV format .

To save as a WAV file, open the Ondoku history page .

The history page displays a list of reading results like this.

Click "WAV" on the left to save the audio file in WAV format.

Split and save AI machine voice files

Narration audio created with "Ondoku" can also be downloaded in parts, separated into sentences .

To download the narration audio in parts, click "Split" on the right side of the history page.

The split download page will open.

After entering the gap time, press "Split and download" to download the file.

*The gap time can be left at the default setting.

The machine voice file will then be split and downloaded in ZIP format.

Depending on the content of the YouTube video, this method may be more convenient for editing than downloading the entire audio at once, so try using it in different ways.

This page also explains how to download the reading files in parts.

Please take a look.

[Ondoku] How to use the split function. Automatically split the audio file you created at regular intervals. | Text-to-speech software Ondoku

Ondoku's splitting function allows you to split audio you've created at regular intervals and download each part as a separate audio file. This blog will explain how to use the splitting function in detail.

3. Edit a video using the machine voice narration created with "Ondoku"

Once you've created the narration audio, edit the video to upload to YouTube or social media .

The most popular video editing software is

• Adobe Premiere Pro
• DaVinci Resolve
• AviUtl

There are various types such as:

This article explains video editing software.

Please take a look.

[2025 Latest] How to Add Narration to YouTube Videos! Explaining Recommended AI Apps and Software, and How to Record | Text-to-Speech Software Ondoku

A complete guide to adding narration to videos! We'll introduce five recommended tools, from free AI apps to paid software, and explain the production process in detail. Perfect for creating videos for YouTube, TikTok, and Instagram.

How to edit when you have downloaded the entire narration audio

When you download the AI machine voice narration created with "Ondoku" as is, first place the audio on the timeline of your video editing software .

Next, position the video to align with the audio .

If you want to create a gap between audio segments, use a tool that cuts material (e.g., the Razor tool in Adobe Premiere Pro or the Blade tool in DaVinci Resolve) to cut the audio and create a gap.

How to edit narration audio when downloaded in parts

When you download the AI machine voice created with "Ondoku" in parts, first load all the audio files into your video editing software.

Next, select all the audio files in your video editing software and place them on the timeline .

When you download audio in parts using "Ondoku," the file names will be numbered consecutively .

Therefore, you can arrange them in order by simply selecting all and loading them.

All that's left to do is edit the intervals between audio files to match the video material .

4. Upload the video you created to YouTube

Once the video is complete, upload it to YouTube or social media.

The key point when uploading to YouTube is to set the language of the video .

On the YouTube video details screen , you can select the language used in the video, such as Japanese or English.

Setting the language here will allow viewers to use automatic subtitles and translation features.

We also recommend adding your own subtitles to your videos .

You can set it yourself based on the script text, but if you want to add subtitles easily, we recommend using the AI transcription service "Transcription-san."

AI can automatically create subtitle files in the "SRT" format used for video scripts, so you can add high-quality, easy-to-read subtitles without the hassle of typing.

This completes the process of creating YouTube video narration using Ondoku 's AI machine voice.

It's very easy to create high-quality AI machine voice readings, so why not try using Ondoku to create narration audio for your YouTube videos for free ?

What is machine voice? Tips for creating video narration with the latest AI apps and software

What are the features of machine voice?

Machine voice that makes it easy to create video narration.

In fact, advances in AI technology have made it much more convenient to use than ever before.

We will briefly explain the features of the latest AI machine voice.

Introducing the features of machine voice and AI narration

Machine speech is a voice created by using speech synthesis technology to read out the contents of a text .

It is used in many fields, including YouTube video narration , broadcasting in stores and facilities , and automated telephone answering systems .

Machine voice technology has existed for a long time, but previously it could only read aloud in a voice that sounded unnatural and robotic.

But today's machine voices are different.

Significant advances in AI technology have made it possible to generate clear, easy-to-listen-to audio that sounds just like it's being read by a professional narrator .

It can be used seamlessly for video narration, so it is widely used on various video sites and social media platforms such as YouTube, TikTok, and Instagram.

You can create narration for free with AI machine voice!

A major feature of AI machine voice is that it is free to use!

The AI reading web app "Ondoku" can read audio for free.

You can now easily create high-quality narration audio and create compelling YouTube videos.

What are the three benefits of using AI voice recognition? It's free and easy to create.

If you want to create videos smoothly and at low cost, we recommend AI machine voice!

We will explain the benefits of AI machine voice.

1. Create video narration for free with AI machine voice!

The biggest advantage of creating video narration using AI machine voice is that it's free !

If you hire a professional narrator to record narration for a video, it can cost tens of thousands of yen even for a short video.

However, with machine voice, you can create video narration completely free of charge using free AI reading apps and software .

Even if you use paid apps or software, you can get narration for as little as 1,000 yen per month, so it's much cheaper than hiring a professional.

With the AI reading web app "Ondoku," you can create machine-voice narration for YouTube videos for free.

If you want to create video narration, we recommend that you first try out "Ondoku" for free.

2. Video narration audio can be completed quickly, reducing video editing time.

Another benefit of AI machine voice is that it can significantly reduce the time required to produce videos .

If you hire a professional narrator, it can take several days from booking the recording to delivering the audio.

Also, if you record it yourself, it takes a long time to record and edit the audio.

But AI machine voices are different.

By using AI reading apps and software, you can create video narration in just a few seconds by simply entering text .

It doesn't take long to create a narration, so you can edit and post your video quickly.

AI reading apps and software can be used 24 hours a day , so if you suddenly decide you want to create a video, you can edit it right away.

3. You can easily edit the content of your video narration audio as many times as you like.

AI machine voice also makes it easy to edit video narration .

When you're creating a video, there are times when you want to change the content of the narration.

With AI machine voice, corrections can be easily completed by simply reading out the new script .

You don't need to pay the expense of having a professional narrator re-record your audio, or the time and effort it takes to record it yourself.

You can easily make edits to create a video narration that you're satisfied with.

As you can see, AI machine voice has many advantages that make it perfect for video narration.

Why not try creating your own YouTube video narration using the AI reading web app "Ondoku" ?

What types of videos can be narrated using AI? A detailed explanation of recommended genres

AI machine voice narration can be used for a variety of video types!

From here on, we will explain the recommended types of videos for which machine-generated narration is particularly effective.

AI-powered narration is ideal for explanatory and how-to videos

Machine voice is best suited to instructional and how-to videos .

The most important thing about an explanatory video is to convey information accurately and clearly .

The machine voice created using the latest AI reads in an easy-to-listen voice like a professional narrator, allowing viewers to easily understand the content.

Also, it's common for explanatory videos to be uploaded with new content on a regular basis.

All you need to do to use the AI machine voice is write the script text , so you can easily post videos every day.

AI voice is perfect for product introduction videos and promotional videos

AI machine voice is also ideal for narrating product introduction videos .

Just like the explanatory videos, the latest AI-powered voice narration is easy to understand, allowing you to clearly convey the appeal of your product.

This is recommended not only for individuals who are creating product explanation videos, but also for companies who are creating official promotional videos.

Unlike previous machine voices, the latest AI machine voices can generate high-quality narration that is perfectly suitable for use in official corporate videos.

When it comes to official corporate videos, we particularly recommend creating product introduction videos, promotional videos, and branding videos in multiple languages .

The AI reading app "Ondoku" supports machine text reading in many languages, including Japanese , English , Chinese , and Korean .

You don't need to search for a foreign language narrator, so you can easily create videos that appeal to international customers.

[2025 Latest] How to Successfully Promote Your Products Overseas | Increase Sales with YouTube Videos and AI Voice | Text-to-Speech Software Ondoku

This article explains how to successfully promote your products overseas. It covers everything from the process of creating multilingual videos using YouTube videos and AI text-to-speech to effective overseas marketing strategies.

Utilizing AI machine voice narration for in-house training videos and manual videos

AI machine voice narration is also recommended for corporate in-house training videos and manual videos .

Accuracy and clarity of content are very important for training videos.

By using an easy-to-listen AI voice, students can understand the content correctly .

Another key point is that using the same audio for all videos creates a sense of unity across the entire training content.

If the training content changes, AI machine voice can quickly replace the narration voice with a new one .

Of course, the multilingual reading capabilities of AI machine voice can also be conveniently utilized for in-house training videos and manual videos.

It is also recommended to use a combination of machine voice, your own voice, and a narrator's voice.

You can record your own video narration or hire a professional narrator.

Depending on the content of the video, it may be a good idea to use a combination of machine voice and your own voice or a narrator's voice .

For those who post videos to YouTube individually, we recommend using AI to create narration for the parts of the video that you are not speaking .

For example, by using AI to create narration for travel videos other than the parts you are speaking, you can create videos more easily and in less time.

Also, when creating videos for a company, we recommend using machine voice when updating the content of in-house training videos or manual videos .

By leaving the parts that have already been recorded by a professional narrator as they are and creating the new video narration using machine voice , you can update the content of your video more smoothly and quickly.

AI machine voice is useful when creating new videos or editing existing ones.

We recommend AI machine voice for video narration in the future.

Why not try creating easy-to-listen AI narration with the AI reading service "Ondoku" ?

What should you check when choosing an AI machine voice?

When creating video narration for YouTube or social media using AI machine voice, there are some points you should definitely check.

Please use this as a reference when choosing an AI reading app or software.

Check whether AI reading apps and software are compatible with commercial use

When creating narration using AI machine voice, you want to check whether it is suitable for commercial use .

If you want to monetize your YouTube channel , we recommend choosing an AI reading app or software that supports commercial use.

Also, if your company is creating promotional videos, branding videos, instructional videos, or in-house training videos , you will need to choose apps and software that are compatible with commercial use.

Be aware that some AI reading apps and software may not allow commercial use or may require additional fees.

The AI text-to-speech web app "Ondoku" can be used for commercial purposes even if you use it for free !

For more information about commercial use of "Ondoku," please see this article.

What you can do with Ondoku. About commercial use (business use) and prohibited items. | Text-to-speech software Ondoku

Ondoku allows commercial use (business use). Whether used by an individual or a corporation, any use for the purpose of directly or indirectly obtaining monetary or other benefits is considered commercial use. However, please note that Ondoku has established prohibited activities. In this article, we will introduce what you can and cannot do with Ondoku.

Check whether it supports reading out technical terms. Dictionary function is also recommended.

When creating explanatory videos, corporate promotional videos, or training videos, you'll want to check whether they support reading out technical terms .

When creating narration using AI machine voice, if technical terms or proper nouns are mispronounced, it can be a time-consuming process to correct them.

AI reading apps and software that use the latest AI speech synthesis engines can read aloud with high accuracy and without errors .

To be even more on the safe side, we recommend using an AI reading app or software that has a dictionary registration function .

The AI reading web app "Ondoku" has a dictionary function, so by registering words such as the names of new products, you can create an AI machine voice with even higher accuracy.

For more information about Ondoku 's dictionary function, please click here.

How to use Ondoku's dictionary function and points to note. Register intonation-adjusted versions for greater convenience | Text-to-speech software Ondoku

Ondoku has a "Dictionary" function. We will introduce how to use the dictionary function and its details. We will also introduce some tips for registering intonation-adjusted words to make it even more convenient to use.

Would you like to easily create YouTube videos using AI machine voice?

In this article, we explained how to create video narration using AI machine voice and the key points to keep in mind.

Using the latest AI reading software and apps, anyone can easily create high-quality video narration.

You can create high-quality video narration for free and in a short amount of time , so you can upload videos with rich content and increase the number of views and subscribers .

With the AI reading web app "Ondoku," anyone can easily create narration audio from their browser.

We recommend that you first try creating a video narration for free using "Ondoku."

Why not try using AI machine voice to create an engaging video?

■ 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