Query String Parser – URL Params to JSON

Parse URL query strings and convert to JSON. Useful for APIs and analytics. Runs in your browser.

Examples

About Query String Parser

The Query String Parser is an essential tool for web developers working with URLs and API parameters. It extracts and parses query string parameters from URLs, converting them into structured JSON objects. Perfect for debugging URL parameters, API development, and understanding query string structure.

Use Cases:

  • Parsing URL parameters from API requests
  • Debugging query string issues in web applications
  • Converting query strings to JSON for processing
  • Understanding URL parameter structure
  • Extracting parameters from logged URLs
  • Testing query string parsing logic

Key Features:

  • Automatic query string parsing
  • Parameter extraction and organization
  • JSON conversion for easy processing
  • Multiple value handling (arrays)
  • URL decoding of encoded values
  • 100% browser-based - no server processing

Related Tools

Explore these related free tools to enhance your productivity and workflow.

URL Parser

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URL Encoder/Decoder

Encode and decode URLs with component and full URL support

JSON Formatter

Format, validate, and minify JSON code with syntax highlighting

Frequently Asked Questions

How do I parse a query string?

Paste your query string (with or without the leading '?') into the input field. The tool automatically parses it and displays the parameters as a structured object. You can also see the JSON representation of the parsed query string.

What is a query string?

A query string is the part of a URL that comes after the '?' character. It contains key-value pairs separated by '&' characters, like 'name=John&age=30'. Query strings are commonly used to pass parameters to web pages.

How are duplicate keys handled?

If a query string has multiple values for the same key (e.g., 'tags=js&tags=web'), the parser will create an array containing all values for that key. Single values remain as strings, while multiple values become arrays.

Can I convert the parsed result to JSON?

Yes! The tool automatically converts the parsed query string to JSON format. You can copy the JSON output to use in your applications or APIs.

Is the query string parser free to use?

Yes! Our query string parser is 100% free with no registration required, no usage limits, and no hidden fees. You can parse as many query strings as you need for your development work.

Are my query strings stored or tracked?

No, all query string parsing happens locally in your browser. We don't store, save, or have access to any query strings you parse. Your privacy is completely protected.

How are URL-encoded values handled?

The parser automatically decodes URL-encoded values. For example, 'hello%20world' becomes 'hello world', and special characters are properly decoded according to URL encoding standards.

Can I parse query strings with multiple values?

Yes! If a key appears multiple times (e.g., 'tags=js&tags=web'), the parser creates an array containing all values. Single values remain as strings, while multiple values become arrays.

What's the difference between query string and URL?

A query string is the part of a URL after the '?' character. It contains parameters. A full URL includes protocol, domain, path, and query string. This tool focuses on parsing just the query string portion.

Can I convert parsed results back to query string?

While this tool focuses on parsing, you can use the URL Builder tool to construct query strings from parameters. The parsed JSON output shows the structure that can be used to rebuild the query string.

How do I handle empty or missing values?

Empty values (e.g., 'key=') are parsed as empty strings. Missing values in the query string simply don't appear in the parsed result. The tool shows all parameters that are present in the query string.