Query String Parser & JSON Serializer — Parse URL query strings into key-value pairs, nested bracket objects, and JSON

{ "page": "2", "limit": "50", "sort": "desc", "filter": { "category": "electronics", "price": { "min": "100", "max": "500" } }, "tags": [ "sale", "featured" ] }

About Query String Parser & JSON Serializer

Developer tool to parse, inspect, and serialize URL query strings. Supports standard key-value parameters, bracket notation for nested objects (e.g. filter[price][min]=10), and repeated array keys. Converts query strings to formatted JSON and vice versa.

Key Capabilities & Features

Deconstructs query strings into clean key-value table
Supports nested bracket notation (filter[key]=val) and array parameters
Two-way conversion: Query String to JSON and JSON to Query
Parameter sorting and empty value stripping options

How to Use Query String Parser & JSON Serializer

Enter Query String

Paste any URL search query string (with or without ?).

Review Parsed Structure

Inspect individual keys, values, and nested objects.

Export JSON

Copy the serialized JSON object for backend testing or API work.

Privacy & In-Browser Execution Guarantee

100% private in-browser analysis.

Frequently Asked Questions

What is bracket notation in query strings?

Bracket notation (like filter[category]=shoes) is a convention popularized by PHP and frameworks like Express/qs to encode nested objects inside URL queries.