Query String Builder
Build a URL query string from key-value pairs and optionally append it to a base URL.
How to Use the Query String Builder
Add parameter names and values to generate a properly encoded URL query string.
Practical Example
Adding page=2 and sort=price produces a query string such as ?page=2&sort=price.
Factors That Affect the Result
URL encoding, duplicate keys, empty values and reserved characters affect the final query string.
Frequently Asked Questions
What is a query string?
It is the part of a URL after the question mark that carries key-value parameters.
Are spaces encoded?
Yes, spaces and other reserved characters should be safely URL-encoded.
Can a URL have multiple parameters?
Yes, parameters are commonly separated with ampersands.