Query String a JSON

A Query String to JSON Converter is a URL parsing utility used to transform the parameters of a web address into a structured JSON object. This tool is essential for frontend developers, API testers, and digital marketers debugging tracking pixels (UTM parameters), analyzing deep links, and extracting state data from URLs.

The conversion engine handles the parsing through the standard URLSearchParams API:

1. Tokenizer: The tool splits the string by the ampersand & character.
2. Decoder: It runs decodeURIComponent() on every key and value to turn %20 back into spaces and %2F into slashes.
3. Typer: It analyzes the structure:
   • Simple Pair: id=123 -> {"id": "123"}
   • Array: tag=a&tag=b -> {"tag": ["a", "b"]}
   • Nested: user[name]=John -> {"user": {"name": "John"}} (if strict mode is enabled).
4. Output: It formats the result as specific valid JSON.

The History of the "?"

Passing data since 1990.

• The Standard: The Query String structure was defined in the very first URI specifications by Tim Berners-Lee.
• The Format: key=value. Simple, but limited. It has no types (everything is a string) and no hierarchy.
• The Modern Need: Apps today speak JSON. Developers need a bridge to turn "URL-speak" into "App-speak." This tool is that Bridge.

Technical Comparison: Formatting

Line vs. Tree.

Query String	JSON
?q=search	{"q": "search"}
&page=2	"page": "2"
&sort=desc	"sort": "desc"

By using this tool, you ensure your Marketing Campaigns are tracking correctly.

Security and Privacy Considerations

Your conversion is performed in a secure, local environment:

• Local Logical Execution: All parsing logic is performed locally in your browser. Your marketing data never touches our servers.
• Zero Log Policy: We do not store or track your inputs. Your Campaign IDs and Auth Tokens remain entirely confidential.
• W3C Security Compliance: The tool operates within the standard browser sandbox, ensuring no interaction with your local file system or Private Metadata.
• Privacy First: To maintain absolute Data Privacy, the tool functions as an anonymous utility.