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Query String to JSON Converter

Convert URL query parameters to JSON format. Parse URL parameters into structured data.

Query String
JSON Output

About Query String to JSON Conversion

URL query strings are a common way to pass data in web applications. Converting them to JSON makes the data easier to work with in JavaScript and other programming languages.

This tool automatically decodes URL-encoded characters and attempts to parse values into appropriate JSON types (numbers, booleans, and nested JSON objects).

Related Tools

JSON to Query String

Convert JSON to query parameters

JSON Unescape

Unescape encoded JSON

JSON Validator

Validate the converted JSON

Frequently Asked Questions

Standard URL query strings with key=value pairs separated by &. The leading ? is optional. Both URL-encoded and plain text values are supported.

Yes! Numbers, booleans (true/false), and JSON strings are automatically parsed. For example, 'count=42' becomes a number, 'active=true' becomes a boolean.

If a parameter appears multiple times (e.g., 'tag=a&tag=b'), the last value will be used. For array parameters, consider using JSON encoding.