For English Learning and Pronunciation! How to Use the Free Text-to-Speech Service "Ondoku"
June 21, 2025
While studying English,

have you ever encountered words you didn't know?
Even for words you've studied once, you might forget them if some time has passed or if you don't use them frequently.
When studying English, you often find yourself re-checking the pronunciation of words you've forgotten, don't you?
Also, to read sentences smoothly, it's important to know not only individual word pronunciations but also the pronunciation of the sentence as a whole.
What method do you use when checking the pronunciation of English words or sentences?
- I want to check word pronunciation
- I want to check sentence pronunciation
- Support for American English, British English, etc.
There is an attractive text-to-speech site that meets these needs for your English studies!
In this article, we will introduce Ondoku, a very convenient text-to-speech service for checking English pronunciation.
Ondoku: A service for easily reading English aloud
Ondoku is a text-to-speech site with simple and easy-to-understand operation.
Inputted text is immediately converted to speech and can also be downloaded as an MP3.
Ondoku is perfect for English learners to check their pronunciation!
Accents support not only American English but also British English.
Multiple speakers, including men and women, are available, so you can choose your favorite voice.
Voice types include:
- Male
- Female
- Girl
- Boy
- Genderless
In addition to these, it supports many other languages.
As a unique feature, you can also have text read aloud in Indian English or Australian English.
Ondoku can be used for free fundamentally.
Paid plans are also available if you wish to increase the number of characters for reading.
However, if you are just checking English pronunciation, the free range of use is more than enough!
How to use Ondoku

The way to use Ondoku for free is very simple.
There is no need to download apps or software. A convenient point is that everything can be operated via a web browser.
How to use:
- Access the Ondoku site
- Enter the text you want to read in the text box (copy and paste is OK)
- Adjust to your preferred settings, such as voice type and speed
- Click Read Aloud
That’s all it takes.
The Ondoku website is displayed in Japanese, so operation is very easy!
With overseas sites, you might feel hesitant until you understand how to use them, but with a Japanese site, you can feel at ease!
Using Ondoku in English
When you feel that "I want to use an English site for the sake of my English studies," you can also set the Ondoku site to English!

Displaying the site in English is also very easy with Ondoku.
Next to the word "Ondoku" at the very top of the site, there is a pull-down menu that says "日本語" (Japanese).
Click this and switch it to "English."
Then, the site will be displayed in English.
If you prefer the English display for your English studies, please give it a try!
Textbooks and printouts can also be read aloud
Ondoku also has a convenient feature: "Read aloud by uploading an image."
This is a function that allows images taken with a smartphone or other device to be read aloud as audio.
You can take photos of picture books, books, textbooks, etc., and have them read aloud by Ondoku.
This feature instantly solves the problem of "I don't know how to read this" when teaching children English at home or reading English textbooks.
Moreover, it's very convenient because you don't have to input each word one by one, saving you the trouble.
[How to use the Image-to-Text-to-Speech feature]

- Access the Ondoku top page
- There are "Text" and "Image" tabs above the text box
- Click the "Image" tab
- Click image upload and select your preferred image
*In the case of a smartphone, you can also launch the camera and take a photo directly here. - Once the image is selected, adjust the speed and pitch of the reading.
- Click the Read Aloud button
Then, the image will be analyzed in a few seconds, and it can be read aloud.
After loading the image, the recognized text will be displayed in the text box.
If there are recognition errors and you want to correct the reading, you can edit it here.
Detailed usage instructions are introduced here.
Ondoku is perfect for English learning
Checking English pronunciation, reading English sentences aloud. Furthermore, it can even perform character recognition from images and read English aloud...!
It's so convenient that Ondoku can be used for free even though so many features are available.
Since it's free to use, you can try it right now!
We hope that the excellent Ondoku, which reads aloud in English, will help you in your efforts to study English.
Please do give it a try.
■ 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.
Email: ondoku3.com@gmail.com
"Ondoku" is a Text-to-Speech service that anyone can use for free without installation. If you register for free, you can get up to 5000 characters for free each month. Register now for free
