Status of failures and errors occurring on Ondoku

On this page, we report information and status regarding

• System failures
• Errors occurring

and other issues with Ondoku.

The current status of system failures and errors is as follows.

Current Issues and Failures

Time of occurrence: 2024/03/24 early morning
Language: Japanese
Voice: Voice Assistant, Announcer A, Announcer B, Robot
Error details: An error occurs where reading is not possible even for about 1000 characters with specific strings when using SSML.

Status: Information provided to the API provider, currently being addressed by the API provider.

Time of occurrence: 2024/02/12 early morning
Language: Japanese
Voice: Voice Assistant, Announcer A, Announcer B
Error details: Playback speed and language change midway when using SSML.

Status: In progress

History of Past Issues and Failures

Time of occurrence: Around 21:30, 2025/06/14
Recovery time: 2025/06/16
Language: All
Voice: Japanese: Nanami, Nanami (Guidance), Aoi, Mayu, Shiori, Daichi, Keita, Naoki
In addition, some voices in each language
Error details: For some voices in each language, reading is not possible when exceeding approximately 1500 characters.

Time of occurrence: 2025/03/05
Recovery time: 2025/05/14
Language: Japanese
Voice: Voice Assistant, Announcer A, Announcer B, Robot, Takumi, Takumi (No pitch), Mizuki
Error details: Reading starts from the middle of a sentence, or the order of the entire text is swapped.

Time of occurrence: 2025/01/30 early morning
Recovery time: 2025/03/04
Feature: Conversation feature
Voice: All
Error details: When attempting to read a total of 1000 characters or more using the conversation feature, it stays on "Loading" and reading cannot be performed.

Time of occurrence: 2025/01/31 early morning
Recovery time: Around 09:00, 2025/02/05
Language: Japanese
Error details: A 404 error (505 error) is displayed on the settings page.

Time of occurrence: Around 21:20, 2025/02/04
Recovery time: Around 05:30, 2025/02/05
Language: All
Error details: Reading cannot be performed

Time of occurrence: 2024/04/11 early morning
Recovery time: 2024/05/28
Language: Japanese
Voice: Announcer A, Announcer B
Error details: Pitch is not reflected

Time of occurrence: Around 14:00, 2024/02/13
Language: Japanese
Voice: Robot
Error details: Audio is played as the Voice Assistant instead of the Robot voice.

Alternative measure: 2024/03/20
We have applied the Robot voice from an older Voice version. We would appreciate it if you could check if it is comparable to the previous voice.

Time of occurrence: 2024/03/15 early morning
Recovery time: 2024/03/17
Language: All
Voice: All
Error details: Intervals (specified seconds) do not work correctly when using the conversation feature.

Time of occurrence: 2023/09/28 early morning
Recovery time: 2023/10/05
Language: All
Voice: All
Error details: Audio cannot be used with the WordPress extension "Ondoku".

Time of occurrence: 2023/09/20 early morning
Recovery time: 2023/10/03
Language: All
Voice: All
Error details: Audio cannot be used with the Google Chrome extension "Ondoku".
Cause: Error due to a security update of the Google Chrome browser.

Time of occurrence: 2023/09/20 early morning
Recovery time: ✕
Language: All
Voice: All
Error details: Ondoku audio cannot be used with the Google Chrome extension "Ondoku-ChatGPT".
Cause: Error due to the security update of the Google Chrome browser and specification changes to ChatGPT.
Response: Recovery was not possible through program fixes. For payments made after September 20, 2023, for the purpose of using the extension, we will provide refunds.
Details: Announcement of the termination of distribution for the Google Chrome extension "Ondoku3-ChatGPT(BETA)"

Time of occurrence: Around 15:00, 2023/08/12
Recovery time: 2023/08/15
Language: All
Voice: All
Error details: The Google Chrome extension "Ondoku-ChatGPT" cannot be used. Error due to specification changes to ChatGPT.

Time of occurrence: Around 22:15, 2023/07/30
Recovery time: Around 22:40, 2023/07/30
Language: All
Voice: All
Error details: Reading is not possible for voices in any language.

Time of occurrence: Around 21:30, 2023/06/23
Recovery time: Around 11:00, 2023/06/24
Language: All
Voice: Japanese: Nanami, Nanami (Guidance), Aoi, Mayu, Shiori, Daichi, Keita, Naoki
In addition, some voices in each language
Error details: Reading is not possible for some voices in each language.

Time of occurrence: Around 20:00, 2023/05/09
Recovery time: Around 09:00, 2023/05/15
Language: All
Voice: All
Error details: When clicking history in the Google Chrome extension "Ondoku-ChatGPT", multiple operation buttons are displayed.

Time of occurrence: Around 22:00, 2023/05/05
Recovery time: Around 20:00, 2023/05/08
Language: All
Voice: All
Error details: The Google Chrome extension "Ondoku-ChatGPT" cannot be used. Error due to specification changes to ChatGPT.

Time of occurrence: Around 11:00, 2023/04/25
Recovery time: Around 20:00, 2023/04/26
Language: All
Voice: All
Error details: The UI is broken in the Google Chrome extension "Ondoku-ChatGPT" as button displays appear on the left side of history. Error due to specification changes to ChatGPT.

Time of occurrence: Around 21:00, 2023/04/21
Recovery time: Around 20:00, 2023/04/25
Language: All
Voice: All
Error details: In the Google Chrome extension "Ondoku-ChatGPT", when starting a question in a thread where no questions have been asked, all buttons disappear and reading is not performed. Error due to specification changes to ChatGPT.

Time of occurrence: Around 22:00, 2023/04/13
Recovery time: Around 20:00, 2023/04/17
Language: All
Voice: All
Error details: The Google Chrome extension "Ondoku-ChatGPT" cannot be used. Error due to specification changes to ChatGPT.

Time of occurrence: Around 09:00, 2023/02/08
Recovery time: Around 14:00, 2023/02/09
Language: Japanese
Voice: "Aoi, Mayu, Shiori, Daichi, Naoki"
Error details: Even when entering any text, an error message saying "An error occurred with the entered text" appears.

Time of occurrence: Around 15:00, 2023/02/02
Recovery time: Around 22:00, 2023/02/02
Language: Japanese
Voice: "Naoki" and "Shiori"
Error details: An error is occurring where noise like a metallic sound is included.

When you have trouble using Ondoku or don't know what to do, please check the Frequently Asked Questions (FAQ).

Answers to questions frequently asked by customers are summarized by genre. If you have any questions, please check the FAQ first.
→ FAQ

If you have any questions for Ondoku, please contact us via the Inquiry form.

■ 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