Query String Parser
Parse URL query string parameters into clean JSON key-value pairs.
Query String Parser
{
"search": "json",
"category": "developer",
"sort": "asc",
"page": "1"
}About Query String Parser
The Query String Parser & Builder translates URL query strings (e.g. `?name=Alex&role=admin&tags=js,ts`) into structured JSON objects and vice versa with automatic type casting, array parsing, and URL encoding/decoding.
How to Use Query String Parser
Step 1
Paste a query string or full URL into the input pane.
Step 2
View the parsed JSON object with all key-value parameters.
Step 3
Edit JSON keys to regenerate an updated query string.
Step 4
Click "Copy Result".
Practical Use Cases for Query String Parser
Frontend Router & State Serialization
Serialize and deserialize React/Next.js URL query states and search filters into JSON objects.
Analytics & UTM Tracking Campaign QA
Audit marketing tracking query parameters (utm_source, utm_medium, utm_campaign, gclid) on landing page campaigns.
Input & Output Examples
Parsing UTM Campaign Query String to JSON
?utm_source=google&utm_medium=cpc&utm_campaign=summer_sale&ids=101&ids=102
{\n "utm_source": "google",\n "utm_medium": "cpc",\n "utm_campaign": "summer_sale",\n "ids": ["101", "102"]\n}Key Features & Performance
- ✓Bidirectional conversion: Query String to JSON and JSON to Query String.
- ✓Handles duplicate query keys as array lists automatically.
- ✓Option to decode or encode URI components (%20, +, &, =).
- ✓100% Client-Side memory execution.
- ✓1-Click Copy formatted JSON or Query String.
Key Terminology & Definitions
URLSearchParams
A native JavaScript web API interface defining utility methods to work with the query string of a URL.
UTM Parameters
Five standard query parameters (utm_source, utm_medium, utm_campaign, utm_term, utm_content) used to track digital marketing campaign effectiveness.