Query String Converter

Parse complete URLs or query strings into JSON, preserve repeated keys as arrays, and rebuild safely encoded query parameters.

Privacy: Your input is processed locally in your browser and is not uploaded.

Query string input

Paste an absolute URL or raw query string. Repeated parameters become arrays. Values remain text, and URL fragments are excluded.

URL or query string

Parsed parameters

{
  "q": "privacy tools",
  "tag": [
    "json",
    "developer"
  ],
  "page": "2"
}

Support

What this tool does

Convert query parameters to JSON and rebuild encoded query strings.

How to use it

Paste a query string or URL to parse, or a JSON object to build. Review repeated keys.

Worked example

?tag=a&tag=b produces a tag array containing a and b.

Limitations and checks

Query values are text, not typed JSON values. A plus sign represents a space in form-style query encoding; use %2B for a literal plus.

How your data is processed

The operation runs in your browser. Copy and download actions use your device. Where Save work is offered, a local copy is stored; eligible work can sync only under your enabled account settings. See Privacy for site analytics and storage details.

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