Syntax Checker & Code Validator
About Query String → Object
The URL Query String to JSON Object Parser converts URL search parameters (`?sort=asc&filter=active&page=2`) into structured JavaScript / JSON objects with automatic array bracket parsing, percent-decoding, and type coercion.
How to Use Query String → Object
Step 1
Paste a query string or complete URL into the input area.
Step 2
Review the parsed JSON object in the viewer.
Step 3
Click "Copy JSON".
Practical Use Cases for Query String → Object
Parsing URL Search Parameters in Single Page Apps
Parse `window.location.search` query strings into typed state objects for React Router, Next.js, and Vue applications.
Debugging Complex API Filter Parameters
Deconstruct long URL query strings containing nested filters and sorting parameters into readable JSON dictionaries.
Input & Output Examples
Parsing Query String to JSON
`?search=shoes&size[]=10&size[]=11&in_stock=true&page=1`
`{\n "search": "shoes",\n "size": ["10", "11"],\n "in_stock": true,\n "page": 1\n}`Key Features & Performance
- ✓Parses RFC 3986 percent-encoded query parameters and URLSearchParams.
- ✓Bracket notation support: parses `tags[]`, `filters[category]`, and indexed arrays.
- ✓Type coercion option: auto-converts numbers and booleans from string representations.
- ✓100% Client-Side memory execution.
- ✓1-Click Copy JSON object.
Key Terminology & Definitions
URL Query String
The part of a URL that assigns values to specified parameters, beginning with a question mark (`?`) followed by name-value pairs separated by ampersands (`&`).
`URLSearchParams` API
A standard browser interface defining utility methods to work with the query string of a URL.