Ondoku recommended environment and recommended number of characters

Jan. 11, 2022

Ondoku recommended environment and recommended number of characters

In order to use this service, we recommend the following environment. In addition, the recommendations for reading aloud are as follows.

Recommended number of reading characters

  • Using SSML: less than 3000 characters
  • Normal time: Less than 5000 characters

* On the input screen, a warning will be displayed if the number of characters exceeds 3000.

If the number of characters exceeds the recommended number of characters, such as 10,000 or 20,000 characters, it may not be possible to read aloud, but server errors are more likely to occur.

Even if you contact us, we will not be able to support you if an error occurs when reading with more than the recommended number of characters.

If you are reading a long sentence, please divide it into several parts and try to read it out loud.

If you want to combine separate MP3 files into one MP3 file, please use an MP3 combining service such as Audio Joiner .

Audio Joiner

Text with symbols may not be read aloud

Ondoku is a service that can read out characters .

If extra symbols are included, it may interfere with reading and may not be read aloud.

For example: & < > : ; " = etc.

In particular, symbols used in SSML tags are error prone.

Symbols that are not related to reading should be removed as much as possible.

If you want the symbols to be read aloud, please take measures such as replacing the symbols with katakana or hiragana.

Example: = equal

Recommended browser

[Windows] Chrome

[Mac OS] Chrome

Ondoku recommends Google Chrome as the recommended browser.

If you are having trouble with an error

  • Change your browser to Chrome (but if you're using Chrome right now, try a different browser)
  • Try Chrome's incognito window

try it.

download google chrome

How to open an incognito window

What is an incognito window

You can browse without saving the browsing history of the website and the information entered in the form.

how to use incognito window

  1. Click "File" on the toolbar
  2. Select Open incognito window


  1. Recall with [Ctrl] + [Shift] + [N] keys

can be launched with

Please try it once.

Recommended internet speed

  • Upstream 1Mbps or more
  • Downstream 1Mbps or more

If your internet speed is slow or unstable,

  • Speech production slows down
  • I can't hear the audio due to an error
  • can't download
  • Pages load slowly

etc., you will not be able to fully enjoy the service.

output file

Format: MP3, WAV

*: WAV format can be downloaded from history.

The generated audio files can be downloaded in MP3 and WAV formats.

file download

  • TOP page: Download button Player ︙ button
  • History: Link MP3/WAV

More downloadable.

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. There are many useful functions such as an extension function ( Ondoku3-ChatGPT ) that allows you to talk with ChatGPT for free. Please use Ondoku.
HP: ondoku3.com
Email: ondoku3.com@gmail.com
Related posts