Query String Generator

Overview

• Builds a URL-encoded query string just by entering key-value pairs.
• Values containing Japanese text or symbols are automatically URL-encoded, so there is no need to encode them by hand.
• You can easily build a query string with multiple parameters by adding more rows.

Usage

1. Enter a key and value. Use the "Add row" button to add more input fields.
2. Click the "Generate" button.
3. The URL-encoded query string is displayed. Use the "Copy" button to copy it to the clipboard.

Example

id=123
name=taro

?id=123&name=taro

Use Cases

• Building query parameters to attach to an API request or link, without worrying about value encoding
• Generating multiple search conditions (keyword, category, page number, etc.) together as a test query string
• Generating parameter values containing Japanese text or symbols without manual URL-encoding mistakes

FAQ

Notes

• A row with an empty key name is excluded from the output.
• Adding multiple rows with the same key outputs them as-is in the order added (duplicates are not removed).
• The generated result exists only on the page and is lost on reload, so copy and save it if you need to keep it.