Query String ↔ JSON

Parse URL query strings to JSON and build query strings from JSON objects with our free online parser. Convert between URL parameters and structured JSON format for API development, URL manipulation, and web development workflows. Perfect for understanding complex URLs, debugging query parameters, and building query strings programmatically.

Our query string parser handles URL encoding, special characters, and nested parameters correctly. Bi-directional conversion lets you parse URLs into JSON or build query strings from objects. Support for array parameters, special characters, and multiple values per parameter. Ideal for API documentation, endpoint testing, and parameter validation.

No installation required. Free for unlimited parsing. Copy results to clipboard. Essential for web developers, API engineers, and anyone working with URL parameters and web development.