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.

Developer Tools

Query String Builder

Build an encoded URL query string from a JSON object, including repeated array parameters.

Free foreverRuns in your browserNo sign-up

Parameters as JSON objectPrefix with ?

Result

Enter your values and select build query string.

About the Query String Builder

Query String Builder is a focused browser-based utility. Build an encoded URL query string from a JSON object, including repeated array parameters.

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 a JSON object of parameter values.
2Choose any available conversion or formatting options.
3Run the tool and review an encoded query string.

Examples

Query String Builder example

Input: a JSON object of parameter values

Output: an encoded query string

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.