[2026 Latest] 10 Recommended Text-to-Speech Software! Introducing free software available for commercial use.

In this article, we will carefully select, compare, and introduce recommended text-to-speech software and services!

Text-to-speech software that converts text into audio can be utilized in various situations, such as video production, language study, and improving accessibility.

In particular, free text-to-speech software that can be used for free has a major advantage in terms of cost.

Furthermore, the number of options for high-quality text-to-speech services that can be used for commercial purposes is increasing.

This time, we will explain in detail the characteristics and usability of each, from browser-based types that require no installation to high-performance desktop types.

We will also introduce many free software programs that can be used for commercial purposes.

By reading this article, you will surely find the most suitable text-to-speech software for you.

[Free] Recommended AI Text-to-Speech Software You Can Use Immediately

The recommendation for you looking for text-to-speech software is Ondoku.

Ondoku is an AI text-to-speech software (web service) that can be used for free from your browser.

It can be used right now with no installation required and simple operation.

Surprisingly, Ondoku allows you to read up to 5,000 characters for free!

Furthermore, commercial use is also OK for free (credit notation is required for the free version).

For text-to-speech conversion, why not try using Ondoku for free first?

What is Text-to-Speech Software? Basics and How to Choose from Free to Paid

First of all, we will briefly explain the basic knowledge of text-to-speech software!

Basics and Types of Text-to-Speech Software

Text-to-speech software is software that converts text into audio.

Text-to-speech technology is evolving rapidly, and voices that were once mechanical can now be read with natural intonation and pronunciation due to the development of AI technology.

There are mainly two types of reading software: "browser-based" and "desktop-based."

The browser-based type features the ability to be used from a web browser without installation.

It can read with high-quality audio by utilizing AI engines in the cloud.

The desktop-based type is the type installed on a computer for use, and has the advantage of being usable even in an offline environment.

Some are released as free software.

Also, some paid installation-type software has attractive characters set for them.

Which is Recommended: Browser-based or Desktop-based?

So, which is better: browser-based software or desktop-based software?

Browser-based text-to-speech software has the major advantage of being usable immediately without installation.

Browser-based services like Ondoku can use the latest AI speech synthesis engines regardless of PC performance, making high-quality reading possible.

In addition, because periodic updates are performed automatically, you can always use the latest functions.

On the other hand, desktop-based reading software has the advantage of being usable even in environments without an internet connection.

Another feature is that there is software specialized for specific purposes, such as reading comments for video streaming.

Even free software can have high functionality, but installation and settings can sometimes be time-consuming.

For beginners, those who want to use it easily, or those who want high-quality audio, the browser-based type is recommended. For those who prioritize offline use, want to use it for stream reading, or want to read with character voices, the desktop-based type is recommended.

What is the Difference Between Free and Paid? It is Recommended to Check Commercial Use as Well

There are differences between free reading software and paid reading software in terms of functional limitations, audio quality, and whether commercial use is permitted.

Even free reading software has basic reading functions, but character limits and advanced adjustment functions may be restricted.

Regarding commercial use, some software permits it even in the free version, while others do not.

For example, Ondoku allows commercial use even in the free version by displaying credit.

Paid reading software has advantages such as being able to use more diverse voices and detailed adjustment functions, and being able to use it commercially without credit.

If you want to use it for free, it is important to first check the terms of use of that software carefully and understand the conditions for commercial use.

What are the Points to Consider When Choosing Text-to-Speech Software?

When choosing text-to-speech software for the first time, it is important to first clarify your purpose.

The optimal software varies depending on the purpose, such as creating narrations for videos, language learning, or improving accessibility.

Of course, ease of use is also important.

Rather than complex functions, reading software with an interface that can be operated intuitively will be easier to continue using for a long time.

Naturalness of the voice is also an important point, and especially if natural Japanese intonation and pronunciation are required, it is better to choose reading software specialized for Japanese.

If you want to use it for free, it is also important to check the details of functional restrictions and see if they affect your use.

If you are considering commercial use, you need to choose free software that is also available for commercial use.

[Free Available] 10 Recommended Text-to-Speech Software Programs

Now, we will introduce in detail exactly which text-to-speech software programs are recommended!

1. Ondoku
2. A.I.VOICE
3. CeVIO
4. VOICEPEAK
5. SofTalk
6. Bouyomichan
7. VOICEVOX
8. CoeFont
9. COEIROINK
10. Yukumo!

1. Ondoku | A Free, High-Quality Voice Service You Can Use Right Now in Your Browser

Ondoku is a text-to-speech service that can be used immediately from a browser without installation.

It can be used right now not only on PCs but also on iPhones, iPads (iOS), and Android smartphones!

It features natural audio utilizing the latest AI technology.

The types of voices are also abundant; for example, in the case of Japanese, you can choose from 16 types of voices.

Although it is a reading service that can be used for free, another feature is that commercial use is OK, such as for monetizing videos or use in a company.

You can read up to 1,000 characters without registration, and up to 5,000 characters after registration for free, so it can handle creating long narrations for free.

The operation is also very simple; just enter the text and press the "Read" button.

Even first-time users can operate it intuitively.

Furthermore, because it supports multiple languages in 48 languages including English, it is also useful for creating foreign language content.

Although it is a free web service, it can read with the highest quality audio, so it is also recommended for first-time AI reading.

Of course, it is also ideal for professional narration purposes.

If you are undecided about text-to-speech software, why not experience Ondoku first?

2. A.I.VOICE | Japanese-Specialized Speech Synthesis Software Equipped with High-Quality AI Voice

A.I.VOICE is high-quality speech synthesis software developed by AI Inc.

It uses a speech synthesis engine called "AITalk" and can generate very natural Japanese speech.

A large lineup of attractive character voices, such as "Yuzuki Yukari" and "Kotonoha Akane/Aoi," who are famous as "VOICEROID" characters, is available.

It supports both Windows and Mac and is sold as paid software.

Because the emotional expression of the voice is rich, and the strength, pitch, and speed of the reading emotion can be adjusted finely, more natural conversation-style reading is possible.

Editing functions for intonation and reading are also extensive, allowing specialized terms and proper nouns to be read accurately.

Its strengths are high naturalness, rich emotional expression, and a high degree of freedom in parameter adjustment, making it ideal for narration and video production.

Shortcomings include the need for an initial investment because it is paid software, and the need to purchase separately for each character.

Regarding commercial use, commercial use by individuals is basically possible by purchasing the product, but use by corporations requires a separate commercial license.

This software is recommended for those who want to create creative audio works or seek high-quality narration.

3. CeVIO | Integrated Voice Creation Software Capable of Singing

CeVIO is voice creation software that develops both talk and singing.

"Talk Voice" for talking and "Song Voice" for singing are sold.

It is based on the technology of Techno-Speech, a venture company from the Nagoya Institute of Technology, and is particularly excellent in natural Japanese intonation and expressiveness.

Character voices with rich personalities such as "Sato Sasara" and "Suzuki Tsudumi" are popular and widely utilized in video production and content creation.

It is software exclusively for Windows and is sold as one-time purchase paid software.

By purchasing "Song Voice," it is also possible to make characters sing songs.

Emotional parameter adjustments are very detailed, and emotional expressions such as joy, anger, and sadness can be adjusted numerically, allowing for the creation of audio with rich expressiveness.

Regarding commercial use, use by individual creators is relatively lenient, but use for corporate use or product sales requires a separate license.

This software is recommended for those who want to create audio content with rich expressiveness or want to try singing voice synthesis.

4. VOICEPEAK | High-Quality Speech Synthesis Editor with Attractive Intuitive Operation

VOICEPEAK is speech synthesis software characterized by intuitive operability.

A wide lineup is available, from voices with character to voices for natural narration.

In addition to Windows and Mac, it is one of the few desktop speech synthesis software programs that also supports Linux.

The function for analyzing the context of text and adding natural intonation is excellent, allowing high-quality audio to be generated even without specialized knowledge.

With an intuitive editor screen, intonation, speed, volume, etc., can be edited visually, making it a design that is easy even for beginners to handle.

Regarding commercial use conditions, commercial use rights are included in the basic license, but separate terms may apply to character voices.

This software is recommended for those who want to produce high-quality narration or perform speech synthesis on multiple platforms.

5. SofTalk | Standard Desktop Reading Software with Simple Functions

SofTalk is standard free software that has been long loved as free reading software for Windows.

Specializing in a simple interface and basic functions, even beginners can use it easily.

As for the speech synthesis engine, multiple engines such as original speech synthesis engine, MikoVoice, and SAPI can be selected.

It previously supported AquesTalk (the voice engine that became the basis of Yukkuri voice), but support has now ended.

Reading can be done easily just by entering text, and it also features a function to automatically read the contents of the clipboard.

Its strengths are that it is very lightweight and operates comfortably even on low-spec PCs, and its basic operations are simple and easy to understand.

Shortcomings include a lack of naturalness in the voice compared to the latest AI, and because it includes abundant sound sources, the file size is over 300MB, which is very large for free software.

Regarding commercial use conditions, the software itself is free, but since the terms vary depending on the speech synthesis engine, it is necessary to check the terms of the speech engine to be used when using it commercially.

This is a free reading software recommended for those who want basic reading functions or are looking for lightweight software.

6. Bouyomichan | Standard Text-to-Speech Software for Streaming

Bouyomichan is free reading software mainly used for game streaming and live streaming, characterized by a distinctive voice known as "Yukkuri voice."

It uses an old version of the speech synthesis library called AquesTalk, which has the major advantage that commercial use is possible even for free.

As lightweight free software for Windows, functions for linking with other software are extensive, so it is often used in combination with streaming tools.

It is known as standard software used for "Yukkuri Jikkyo" and "Yukkuri Kaisetsu" on sites like Nico Nico Douga and YouTube.

Linkage with streaming software such as OBS is also possible, and it is widely used for reading comments on YouTube streams.

Its strengths include high connectivity with other software, support by a large community, and an attractive, unique voice.

Shortcomings include mechanical sound quality lacking naturalness, mandatory installation, and support only for Windows.

Regarding commercial use conditions, since it uses an old version of AquesTalk, commercial use for free is possible, but we recommend checking the terms of use.

This reading software is recommended for those involved in game streaming, comment reading, and Yukkuri video production.

7. VOICEVOX | High-Quality Character Voice Generation Engine

VOICEVOX is high-quality speech synthesis software developed in open source, characterized by diverse character voices.

Reading is possible with the voices of popular characters such as "Zundamon," "Shikoku Metan," and "Kasukabe Tsumugi."

It is desktop software compatible with the three major operating systems: Windows, Mac, and Linux.

It uses deep learning technology for speech synthesis and can generate natural, high-quality speech.

Adjustment of intonation and detailed setting of audio parameters are possible, making it compatible with professional audio editing.

A version compatible with GPU (graphics card) is also provided, allowing faster processing on high-performance PCs.

Regarding commercial use conditions, the software itself can be used commercially, but character terms vary, so it is necessary to check the terms of use for each character used.

This reading software is recommended for those who want to incorporate unique voices into creative activities or video production.

8. CoeFont | High-Quality AI Japanese Speech Synthesis Service

CoeFont is a paid Japanese speech synthesis service utilizing AI.

Characterized by natural Japanese pronunciation and intonation, it can read with natural inflection close to that of a human narrator.

Diverse voices modeled after voice actors and actors are prepared, allowing you to select a voice according to your purpose.

It also features a function to automatically add appropriate intonation and pauses based on the context through its unique AI technology.

It also provides a function to create AI voices based on your own voice, allowing for the creation of original audio.

A free plan is also available, although there are restrictions on functions and number of characters.

This service is recommended for those who want to create professional Japanese narration or seek high-quality speech synthesis.

9. COEIROINK | Open-Source AI Speech Synthesis Software

COEIROINK is AI speech synthesis software developed primarily targeting creative activities.

It is desktop software compatible with Windows, Mac, and Linux, and requires installation.

In addition to official and certified character voices, voice models created by users called "MYCOE" can also be used.

Detailed adjustments of intonation and emotional expression are possible, allowing for the creation of more expressive audio.

Since the download size is generally large, care must be taken regarding the network environment during installation.

Regarding commercial use conditions, commercial use is basically possible, but terms vary depending on the voice model used.

This is recommended for those who want to incorporate unique voices into creative activities or use diverse voice models.

10. Yukumo! | Browser-Based Yukkuri Voice Reading Service

Yukumo! is a browser-based reading service using the speech synthesis library "AquesTalk" by AQUEST Corp.

Since it can be used directly from a browser without installation, you can start using it immediately from any device.

The biggest feature is that reading is possible with the characteristic voice known as "Yukkuri voice" (monotone voice).

It supports multiple engine versions such as AquesTalk 1, AquesTalk 2, and AquesTalk 10, allowing for a variety of voice qualities to be selected.

Text entry is easy; reading starts just by entering text into the text box on the browser.

The read audio can also be downloaded and utilized for video editing, etc.

Its strengths are that it can be used easily without installation, it is one of the few services that allows Yukkuri voice to be used from a browser, and operation is simple and easy even for beginners.

Shortcomings include that the naturalness of the voice is mechanical compared to the latest AI technology, and there are restrictions on commercial use.

Regarding commercial use conditions, non-commercial use by individuals is free, but commercial use requires a separate purchase of a commercial license for AquesTalk.

This service is recommended for those who want to easily start creating videos such as "Yukkuri Kaisetsu" and "Yukkuri Jikkyo" without installation.

[Free is OK] Detailed Explanation of Text-to-Speech Software Introduction and Setting Methods

As an example of how to use text-to-speech software, we will explain the reading method of Ondoku!

[Free] How to Start and Basic Settings for Browser-Based Ondoku

Ondoku is a reading service that can be used right now just by accessing it from a browser.

First, access the official website.

Enter or paste the text you want to read into the text input field.

Choose your preferred voice from "Audio."

As needed, you can also adjust the reading speed and pitch.

When settings are complete, click the "Read" button.

High-quality audio will be played immediately.

The read audio can be saved in MP3 format with the "Download" button.

If you want to read longer texts, you will be able to read up to 5,000 characters by performing free registration.

In this way, Ondoku can be used easily for free!

Why not utilize Ondoku for your creative activities, language learning, and business?

Tips and Setting Examples for Audio Customization

To increase the naturalness of text-to-speech software, appropriate setting adjustments are important.

First, adjust the reading speed according to the content and purpose.

Standard speed for general explanations, and slightly slower for detailed explanations or important points, makes it easier to convey.

For language learning, it is also recommended to make it extremely slow, such as 0.3x.

In Ondoku, since the pitch of the voice can also be adjusted, it is effective to set it slightly higher if you want to show character and lower if you want to give a calm impression.

Even with free reading software, by devising these settings, you can create quite natural and easy-to-hear audio.

Usage Methods and Precautions on Smartphones

When using text-to-speech software on a smartphone, browser-based services are the easiest.

Ondoku can also be accessed from smartphone browsers, allowing for high-quality reading just like on a PC.

Since many desktop software programs cannot be used on smartphones, if you want to use it across platforms such as PC, smartphone, and tablet, the browser-based type is recommended.

When using reading services on a smartphone, be careful about mobile data usage.

It is recommended to use it in a Wi-Fi environment.

If you save the reading audio created on a smartphone in cloud storage, editing work on a PC later will be smoother.

Recommended reading methods for iPhone and Android smartphones are also introduced on this page.

Text-to-Speech Software Utilization Techniques That Can Be Done for Free

Create Audiobooks with Text-to-Speech Software

With text-to-speech software, you can take in information not only visually but also aurally.

By converting long news articles or reports into audio with free reading software and listening during commute time or housework, you can use your time effectively.

Even free services like Ondoku allow high-quality reading, so you can efficiently collect information by converting news articles and blog contents into audio.

For those who want to increase their reading volume, the method of entering the contents of e-books into reading software and converting them to audio is also effective.

With Ondoku, anyone can easily create an audiobook.

Utilizing the speed adjustment function and gradually increasing the playback speed as you get used to it allows you to take in more information in a short time.

Those who feel tired of collecting information from digital content can continue information input while reducing eye strain by utilizing reading software.

Utilize Text-to-Speech Software for Writing Refinement and Proofreading

Text-to-speech software is also ideal for proofreading and refinement of writing.

By listening to your own writing with text-to-speech software, you can discover unnatural points and errors that you don't notice with your eyes.

Using software that reads with natural intonation like Ondoku allows you to immediately discover points where the rhythm or flow of the sentence feels off.

Sentences that are too long or expressions that are hard to understand can be noticed more quickly by listening to the reading than by looking with your eyes.

By listening to presentation materials and speech manuscripts with free reading software, it is possible to check the clarity for the listener.

By reading again even after correcting the text, you can finish it as more sophisticated writing.

By checking business documents and emails with reading software before sending, the content will become more accurate and easier to convey.

Utilize Reading Audio for English and Foreign Language Pronunciation Practice and Shadowing

In foreign language learning, text-to-speech software becomes a powerful learning tool.

With multi-language compatible free services like Ondoku, you can easily check pronunciation by reading text in the language you are learning.

Reading software can also be utilized for shadowing practice (practice of pronouncing in the same way following the audio).

Just by imitating the native pronunciation of AI reading software and services, you can improve your pronunciation rapidly.

Reading software and services are also ideal for strengthening listening.

It is effective to start with simple sentences and gradually step up to difficult content.

Since you can study with native pronunciation even with reading software available for free, the efficiency of language learning from speaking to listening will significantly improve.

Utilize Text-to-Speech Software for Presentations and Video Production for Free

Utilizing text-to-speech software for presentations and video production can give a professional impression.

By using free services that can be used commercially like Ondoku, you can create high-quality narration audio without spending money.

In commentary videos like on YouTube, reading software is useful when you don't want to use your own voice or want to make it easier to hear narration.

In video production based on commercial use, do not forget to check the terms of the free software used and perform necessary credit notation.

We are explaining tips for smoothly producing video audio, so please take a look at this article as well!

[FAQ] Troubleshooting and Frequently Asked Questions About Text-to-Speech Software

Dealing with Specific Words Not Being Read Properly

If specialized terms or proper nouns are not read correctly, there are several dealing methods.

First is the dictionary function.

By using the dictionary function with reference to this article, you can adjust the reading of Japanese.

Also, it can be handled by ingenuity such as changing kanji to hiragana.

When foreign language words are mixed in, it is also a point to try Katakana notation instead of alphabet notation.

If symbols or special characters are included, reading becomes smooth by removing or replacing them.

If it still cannot be read correctly, the method of rephrasing into another expression is also effective.

How to Read Multiple Files at Once

When you want to read multiple text files consecutively, the method differs depending on the software.

In browser-based services like Ondoku, you can read at once just by copy & pasting multiple texts into the text box.

If long reading is required, it will be easier to manage by processing into multiple files with appropriate breaks.

Procedure for Audio Saving and Exporting

The method of saving read audio as a file differs depending on the software.

In Ondoku, just click the "Download" button after reading to save in MP3 format.

In desktop software, select functions such as "Export" or "Save Audio" from the menu.

Choose the format of the audio file to save according to the purpose.

In general uses, MP3 format has high versatility and a good balance between sound quality and capacity.

What Will Happen to Text-to-Speech Technology in the Future?

The quality of text-to-speech software will continue to improve in the future due to the evolution of AI technology.

More natural intonation and emotional expression will become possible, allowing high-quality reading that is indistinguishable from human voices.

Even in free services, high-quality speech synthesis is expected to become commonplace.

Also, the precision of multi-language support will improve, and natural reading will be realized in more languages.

Ever-advancing AI text-to-speech technology will surely increase in importance in various fields such as improving accessibility and efficiency of content production.

Why Not Experience the Text-to-Speech Software That is Perfect for You?

When choosing text-to-speech software, first clarify your purpose.

It is also important to try free reading software and find the one that is best for your purpose.

For example, with browser-based services like Ondoku, it is possible to try it for free right now.

Why not actually experience free software and services that can read with the latest AI first?

■ 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.