Is my input uploaded?

No. This website tool runs in your browser. Only the optional public API version sends input to the authenticated API route.

Can I use this in an application?

Yes. The Developers documentation lists the authenticated endpoint, request parameters and response example.

Should I verify the result?

Yes. Deterministic tools are designed for repeatable results, but format-specific or heuristic output should still be checked for your use case.

Text Tools

Vowel Counter

Count the total occurrences of A, E, I, O and U in text.

Free foreverRuns in your browserNo sign-up

Text

Result

Enter your values and select count vowels.

About the Vowel Counter

Vowel Counter is a focused browser-based utility. Count the total occurrences of A, E, I, O and U in text.

The calculation runs locally in your browser, so the supplied value is not uploaded to ToolsOnDuty. The same capability is also available through the authenticated developer API.

Key features

Fast local processing with explicit validation
Copy-ready structured result
No account, upload or paid data provider required

How to use

1Enter the text to analyze.
2Choose any available conversion or formatting options.
3Run the tool and review the total and per-vowel counts.

Examples

Vowel Counter example

Input: the text to analyze

Output: the total and per-vowel counts

Frequently asked questions

Is my input uploaded?: No. This website tool runs in your browser. Only the optional public API version sends input to the authenticated API route.
Can I use this in an application?: Yes. The Developers documentation lists the authenticated endpoint, request parameters and response example.
Should I verify the result?: Yes. Deterministic tools are designed for repeatable results, but format-specific or heuristic output should still be checked for your use case.