[2025 Edition] 10 AI Speech Synthesis Apps Compared! A Detailed Explanation of Features and How to Use Them, from Free Services to Paid Text-to-Speech Software

I'd like to know about some recommended free AI reading software and apps!

AI text-to-speech apps and software that can convert text into natural-sounding speech are attracting attention!

Advances in AI technology have made it possible to provide very high quality audio readings.

What's more, some of the recommended AI reading apps and software are free to use .

AI text-to-speech apps can be used in a variety of situations, such as narrating videos, creating language learning materials, and converting business documents into audio.

In this article, we will introduce a carefully selected list of the latest recommended AI text-to-speech apps and software for 2025 !

We will explain in detail the features and usage of apps, from free to paid software, so why not find the text reading app that's perfect for you?

[Free] Recommended AI text-to-speech app "Ondoku"

If you're looking for an AI reading app or software, we recommend "Ondoku" !

"Ondoku" is a free, high-performance AI-powered text-to-speech web app.

No installation required , you can convert text to speech right away.

High-performance speech synthesis AI can synthesize easy-to-listen voice that sounds like a professional narrator is speaking.

It supports over 48 languages, including English, Chinese, and Korean , so it can also be used for narrating YouTube videos aimed at overseas audiences and making announcements for inbound tourists.

What's more, "Ondoku" is free!

Once you register and log in, you can read out up to 5,000 characters , so you can create video narrations for free right now.

If you're looking for an AI text-to-speech app or software, we recommend "Ondoku" !

Why not try out "Ondoku" for free first?

[2025 Latest, Free] Explaining How to Choose AI Text-to-Speech Apps and Software

If you want to create video narration, in-store announcements, or language learning materials, we recommend using AI reading apps and software.

First, we will explain how to choose recommended AI text-to-speech apps and software.

Why are AI text-to-speech apps and software recommended?

• I want to create a narration for a video
• I want to create announcements for shops and facilities
• I want language learning materials with native pronunciation

In such cases, we recommend using AI text-to-speech apps and software .

AI text-to-speech apps and software are apps and software that synthesize voice and read aloud the text you input.

Its special feature is its ability to synthesize clear, easy-to-listen voice that sounds as if a real person is reading aloud .

Advances in AI technologies such as deep learning have made it possible to synthesize voices that sound much more realistic than the traditional mechanical reading voices of the past.

What's more, the AI text reading app is free to use!

If you want to synthesize voice for free, we recommend the latest AI reading apps and software.

Why not use this article as a reference to create your own narration or announcement audio?

What are the types of AI text-to-speech apps and software?

Text reading apps and software

• AI text-to-speech web app that can be used from a browser
• Install and use AI text-to-speech software

There is.

The advantage of this web app-based text reading service that can be used from a browser is that it is free to use !

What's more, no installation is required, so you can use it immediately when you want to use it.

Another benefit is that it supports many foreign languages , including Japanese and English.

On the other hand, AI reading software that is installed on a PC is characterized by the fact that many of the software programs come with pre-defined characters.

There is software that is sold as a packaged version or downloadable version, and there is also free software that can be used for free.

The supported languages are often determined by each software, such as only Japanese or only English.

Check if it can be used for commercial purposes! Even paid apps and software may not be used for commercial purposes.

When choosing an AI text-to-speech app or software, it is recommended to check whether it can be used for commercial purposes .

If you want to monetize video production or use it for business purposes at a company or public institution , you will need to choose apps and software that can be used for commercial purposes.

Some paid software allows you to monetize videos, but does not allow commercial use by companies, etc.

In this article, we will explain whether recommended AI text-to-speech apps and software are OK for commercial use, so please take a look.

10 Recommended AI Text-to-Speech Apps and Software (Free and Included)

I want to try AI voice synthesis using apps and software! I'd also like to know about free apps!

Now, let's take a look at some specific AI reading apps and software that we recommend!

1. Ondoku
2. AIVOICE
3. Easy! AITalk
4. CeVIO AI
5. VOICEPEAK
6. COEIROINK
7. VOICEVOX
8. CoeFont
9. Boyomi-chan
10. MYukkuriVoice

Comparing the features of recommended AI text-to-speech apps

1. Ondoku: The Best Free AI Text-to-Speech Web App

If you're looking for a voice synthesis app or software, "Ondoku" is a recommended web app to start with!

Its feature is that it can synthesize high-quality voice for free using the latest AI voice synthesis technology .

It is a web application that can be used from a browser and does not require any complicated installation work.

Simply enter text and press a button to synthesize natural-sounding AI voice in just a few seconds.

There are over 16 different Japanese voices to choose from, including female, male, and child voices.

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.

The latest AI speech synthesis engine generates easy-to-listen-to voice that sounds like it's being read by a professional narrator .

The reading speed and pitch can be adjusted freely.

There is also a conversation function that uses multiple voices, so you can create the voice you want to suit your needs.

Ondoku also supports voice synthesis in foreign languages, making it ideal for narration and announcements.

"Ondoku" also features multilingual support!

AI text reading is possible in over 48 languages, including English, Chinese, and Korean .

[Ondoku] Listen to the voices and sample audio for supported languages | Text-to-Speech Software Ondoku

Here we will introduce Ondoku's supported languages and sample audio.

It is also recommended for narrating YouTube videos aimed at overseas audiences and creating announcements for inbound tourists.

Commercial use OK! Widely supported from YouTube monetization to business use

Of course, "Ondoku" can be used for commercial purposes.

It is also recommended for YouTube monetization and corporate business use .

Even if you use it for free, you can use it for commercial purposes, so you can create video audio and facility narration for free (credit is required to use it for free. Click here for more details) .

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.

Recommended free AI text-to-speech apps

What's more , Ondoku is free to use!

• No registration or login: 1,000 characters
• With registration and login: 5,000 characters

It can also read out text, so you can use AI to read text aloud for free right now.

"Ondoku" is a recommended AI text-to-speech web app that can be used for a wide range of purposes, including video production, language learning, converting business documents into audio, and improving accessibility.

If you're looking for a text-to-speech app or software, why not start with "Ondoku" ?

2. AIVOICE: Paid AI text-to-speech software with famous characters

AIVOICE is a paid text-to-speech software developed by AI Corporation.

This product is the successor to VOICEROID , and AIVOICE2 is currently the latest version.

The biggest feature is that it includes a lineup of popular character voices such as "Yuzuki Yukari" and "Kotoha Akane/Aoi."

If you want to create a "VOICEROID video," we recommend purchasing this software.

It is sold as a one-time paid software that is compatible with both Windows and Mac.

Personal commercial use is generally possible with product purchase, but corporate use requires a separate license.

3. Easy! AITalk: Paid AI text-to-speech software with a traditional voice

Easy! AITalk is an AI text-to-speech software developed by AI Corporation, the same company that developed AIVOICE.

This software is installed on a PC and is compatible with Windows only .

Easy! Unlike the AIVOICE series, AITalk does not have character illustrations.

This is paid software that is useful when you don't need character in your voice.

However, this software is for personal use only and cannot be used commercially by businesses.

4. CeVIO AI: AI text-to-speech software that can synthesize voices using character voices

CeVIO AI is a speech synthesis software that can produce realistic AI readings in character voices.

A unique feature of this service is that it comes with both AI reading software and singing software .

This is a one-time paid software for Windows that reads aloud in the voices of unique characters such as "Sato Sasara" and "Suzuki Tsuzumi."

For each character, a reading software called "Talk Voice" and a singing software called "Song Voice" are sold.

Our unique AI speech synthesis technology enables text to be read aloud with rich emotion.

The terms for personal commercial use are relatively relaxed, but corporate use requires a separate license.

5. VOICEPEAK: Paid AI Text-to-Speech Software with Various Voices

VOICEPEAK is an AI text-to-speech software that is compatible with Windows, Mac, and Linux.

Like AIVOICE and CeVIO, this is paid software that allows you to read aloud using a character's voice .

We also sell audio without character illustrations, which is ideal for narrating videos for corporate marketing and branding.

Another feature is that there are packages that include multiple character voices , so you can also create videos in which characters talk to each other.

Please note that if you use it for commercial purposes, you will need to follow the terms of use for each character.

6. COEIROINK: AI voice synthesis software for creative activities

COEIROINK is an AI text-to-speech software developed specifically for creative activities .

This desktop software is compatible with Windows, Mac, and Linux and can read aloud using a variety of character voices.

In addition to official and authorized characters, the user-created voice model "MYCOE" can also be used.

It also supports fine adjustments such as intonation and emotional expression.

This is free software developed as open source and can be used for commercial purposes, but the terms and conditions vary depending on the voice model used, so it is important to check in advance.

Character terms of use are generally based on the assumption that the character is for personal use.

7. VOICEVOX: Popular AI voice synthesis software for character voices

VOICEVOX is a popular AI text-to-speech software that features unique character voices.

Its greatest feature is that it can be read aloud in the voices of popular characters such as "Zundamon," "Shikoku Metan," and "Kasukabe Tsumugi."

This free desktop software is compatible with Windows, Mac, and Linux and uses AI technology to read aloud in a natural voice.

Fine-tune intonation and voice parameters for professional-level audio editing.

The software itself is free and can be used for commercial purposes, but please note that you must also follow the terms of use for characters such as Zundamon .

8. CoeFont: Paid Web App that Reads Text in the Voices of Voice Actors and Celebrities

CoeFont is a web app that allows you to read text aloud using an AI voice from your browser.

This is a paid service with individual and business plans available.

It features an AI voice based on the voices of voice actors, narrators, and celebrities , and also supports reading in multiple languages.

It is also possible to create an AI voice based on your own voice .

We also provide free services for people who have lost their voice due to illness .

9. Boyomi-chan: A popular app for streamers

RoboReader is a standard text-to-speech software that is widely used in game streaming and live streaming.

It can be read aloud in a distinctive voice called "Yukkuri Voice."

One of its features is its extensive integration with streaming software such as OBS .

Recommended for reading out comments on YouTube broadcasts.

It is also widely used in the "Yukkuri Commentary" and "Yukkuri Explanation" on YouTube and Niconico Video.

This is free software that can be used for free and is only compatible with Windows.

Another feature is that it can be used commercially because it uses an older version of the speech synthesis engine "AquesTalk."

Unlike the latest AI speech synthesis engines, it can only produce a mechanical and unique voice, but in return it is a unique app that has some things that only this software can do.

10. MYukkuriVoice: A slow-motion voice reader for Mac

MYukkuriVoice is a text-to-speech software recommended for Mac users.

This software can also read aloud in a unique voice called "Yukkuri Voice."

This software is free to use, but if you want to use it for commercial purposes, you will need a commercial license for the speech synthesis engine "AquesTalk."

There are few text-to-speech software programs compatible with Mac, so this is a valuable app for those who want to create slow-motion explanatory videos or slow-motion commentary videos.

[Free] Explaining how to use the AI text reading app!

I'd like to try using an AI text-to-speech app!

From here on, we will explain how to use "Ondoku" for those who want to actually use the AI text reading app/software!

[Free] How to use the AI reading app "Ondoku"

To use AI reading with "Ondoku," first open the official website's homepage.

When you open the top page, a text input field will appear, so enter the text you want to read out loud. You can also copy and paste.

Next, select your language.

After selecting the language, select the type of voice.

For Japanese, there are over 16 voices to choose from, including female, male, and child voices .

You can listen to the Japanese voices in this article.

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.

You can listen to foreign language voices in this article.

[Ondoku] Listen to the voices and sample audio for supported languages | Text-to-Speech Software Ondoku

Here we will introduce Ondoku's supported languages and sample audio.

If you need to adjust the reading speed or pitch, you can do so by moving the sliders left and right.

Now you're ready to read!

Press the "Read aloud" button to read it out loud.

The AI reading process is completed in just a few seconds .

The screen will change and the reading result will be displayed.

You can save the audio you created in MP3 format by clicking the "Download" button.

In this way, with the AI reading web app "Ondoku," anyone can easily synthesize AI voices that are easy to understand!

It's free to use, so why not give Ondoku a try?

Recommended ways to use AI text-to-speech apps for different purposes!

How can you use AI reading apps and software?

The possibilities for AI text-to-speech apps that can synthesize easy-to-listen-to voices are endless!

It can be used for a wide range of purposes, from video production and store announcements to language learning.

[Video Production] Create YouTube narration for free

A recommended use for AI text reading apps is for narration in video production.

The audio is completed simply by entering the script text , making it much easier to add narration than recording it yourself.

Another advantage is that no expensive recording equipment is required .

[2025 Latest] Create video narration with AI voice synthesis! Recommended free services for YouTube monetization and how to use them | Text-to-speech software Ondoku

This article explains how to use AI text-to-speech services to create narration for YouTube videos. It also provides detailed information on the features and usage of free tools such as Ondoku, as well as important points to note when editing videos.

When thinking about monetizing videos posted on YouTube, it is important to choose apps and software that can be used commercially .

"Ondoku" is OK for commercial use , so you can rest assured when monetizing your channel.

It is also possible to read aloud in foreign languages , so you can create videos for overseas audiences and attract even more viewers!

Announcements for stores and facilities can also be created for free using an AI reading app!

AI text-to-speech apps can also be used for announcements in stores and facilities !

It can create easy-to-listen audio like a professional narrator, allowing you to provide clear guidance to customers at stores and facilities.

Furthermore, you can increase sales by broadcasting announcements introducing services and products !

Achieve professional-level in-house announcements with automated voice! A complete guide to AI announcements | Text-to-speech software Ondoku

Automate in-house announcements with AI! Ondoku creates narrator-quality automated voice for free. Multilingual support ensures perfect inbound tourism. Improved operational efficiency also contributes to cost reduction!

Of particular interest are announcements aimed at inbound tourists.

It is very difficult to create announcements in foreign languages such as English on your own, but you can easily create them for free using an AI text-to-speech app.

By making announcements at stores, facilities, and transportation facilities that are struggling with overtourism , it is possible to accurately communicate to inbound tourists how to use the facilities and proper etiquette.

Here are some recommended ways to use AI reading apps that are actually used in the transportation and tourism industries, such as on Shinkansen trains .

[Archival Edition] Solving the inbound and overtourism problem! How to create multilingual guides using the latest AI tools | Text-to-speech software Ondoku

Are you troubled by overtourism caused by the increase in inbound tourists? This article provides a thorough explanation of how to create free multilingual guides using AI technology, as well as specific countermeasures for tourist destinations. We'll introduce a practical guide that you can start using right away.

[Shadowing] AI reading apps are also recommended for language learning!

AI text-to-speech apps are also recommended for language learning .

You can quickly create audio with native pronunciation in a foreign language, so you can quickly learn the pronunciation of unfamiliar words and the rhythm of sentences.

A learning method that I particularly recommend is "shadowing."

You can create audio for teaching materials of any content you like, so you can shadow sentences that suit your learning purpose, such as work or tourism.

See this article for more on shadowing.

[Complete Guide] How to do English shadowing? Explains how to create free learning materials! | Ondoku Text-to-Speech Software

Improve your English skills efficiently with shadowing! Learn a beginner-friendly learning method that simultaneously improves your listening, pronunciation, and speaking skills. We also introduce how to create teaching materials using free AI audio.

When using an AI text-to-speech app to learn a language, it is recommended to choose an app or software that supports multiple languages .

Ondoku supports over 48 languages , so you can use it to learn not only English but languages from around the world.

Want to find the AI text-to-speech app that's right for you?

Advances in AI technology have made it possible for free AI text-to-speech apps to synthesize very high-quality audio.

The latest AI can be used conveniently for a wide range of purposes, including video production, store announcements, and language learning !

For beginners or those who want to easily create high-quality audio right now, we recommend "Ondoku," which can be used for free from your browser .

If you're looking for an AI text-to-speech app, why not try "Ondoku" for free ?

■ 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