Build a URL query string from editable name-and-value pairs. Safely encode API parameters, search filters, pagination values, and other URL data in your browser.
How to use the URL Query String Builder
Add a base URL when you need a complete link, or leave it blank to generate only the query string. Add one row per parameter, encode the values, and test the final URL against the receiving application.
Frequently Asked Questions
What is a URL query string?
It is the portion after a question mark that passes named parameters such as search terms, filters, or page numbers.
Should query parameter values be encoded?
Usually yes. Percent-encoding prevents spaces and reserved characters from changing the URL structure.
Can a URL contain repeated parameter names?
Yes. Some APIs and frameworks use repeated names to represent multiple values.
Is this the same as a UTM builder?
No. UTM parameters are a specific marketing convention; this tool builds arbitrary query parameters.
Does the generated URL leave my browser?
No. The URL is assembled locally and is not requested or opened automatically.