Query String Parser

Overview

• Breaks a query string (the part of a URL after ?) down into a list of key-value pairs.
• URL-encoded values (such as %E3%81%82) are automatically decoded before display, so you can see the actual parameter values directly.
• Even when the same key appears more than once, every pair is listed in the order it appears.

Usage

1. Enter a query string into the input field (the leading ? can be omitted).
2. Click the "Parse" button.
3. The list of keys and values is displayed. All occurrences of a repeated key are shown.

Example

?id=123&name=taro&active=true

id = 123
name = taro
active = true

Use Cases

• Quickly checking the value of a specific parameter within a long query string
• Checking a repeated same-key parameter that comes from a multi-select input such as checkboxes
• Decoding a URL-encoded parameter value to check the actual string being sent

FAQ

Notes

• The leading ? can be omitted and the string will still parse correctly.
• When multiple pairs share the same key name, all pairs are listed as-is (they are not merged into an array).
• The entered content exists only on the page and is lost on reload.