# Query String Builder

Create an encoded query from an ordered CSV of key and value pairs.

[Open this tool](https://whatson.pk/developer-query-builder-calculator/)

Category: Developer & Data

Query parameters can repeat, and their order may matter to the receiving service.

Enter ordered key and value rows and review the escaped query component.

## Inputs and controls

* CSV with key,value headers
* Space encoding: %20; +

## How to use

* Paste or enter CSV with key,value headers.

* Choose space encoding.

* Select Process input. Read the returned values alongside the assumptions below before copying, exporting or acting on the result.


## Why use this tool

Duplicate keys remain in sequence rather than collapsing into one value.


## Before relying on the result

Duplicate keys are retained in input order. The output is a query component, without an initial question mark.


## Tool limitations

Duplicate keys are retained in input order. The output is a query component, without an initial question mark.

## Questions

### Does the output include the initial question mark?

No. Add the query component to the intended URL using the appropriate separator.

### What should I check before using Query String Builder?

Check CSV with key,value headers and Space encoding. Use the exact units shown beside the controls and replace any example values with your own inputs.

Source page last modified (UTC): 2026-10-04T16:58:29+00:00

This profile describes the tool. It does not execute it or supply a professional certification.