Do I need to include the ? prefix?

No, the leading ? is optional. Both ?key=value and key=value are handled correctly.

How are repeated parameters handled?

If the same key appears more than once (e.g. tag=js&tag=ts), the values are collected into a JSON array: {"tag":["js","ts"]}.

Are URL-encoded characters decoded?

Yes. The parser uses URLSearchParams internally, which automatically decodes percent-encoded characters such as %20 (space) and %2F (slash).

Query String to Object

Parse a URL query string into a JSON object.

Query String to Object parses URL query strings such as ?key=value&name=Alice into a formatted JSON object. Handles URL-encoded values, repeated parameters (converted to arrays), and the optional leading ? character. Useful for debugging URLs, inspecting form submissions, and building URL parsers.

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Related Tools

{}?Object to Query String

Convert a JSON object to a URL query string.

%URL Encode

Encode text for safe use in URLs using percent-encoding.

%URL Decode

Decode percent-encoded URL strings back to readable text.

FAQ

Do I need to include the ? prefix?: No, the leading ? is optional. Both ?key=value and key=value are handled correctly.
How are repeated parameters handled?: If the same key appears more than once (e.g. tag=js&tag=ts), the values are collected into a JSON array: {"tag":["js","ts"]}.
Are URL-encoded characters decoded?: Yes. The parser uses URLSearchParams internally, which automatically decodes percent-encoded characters such as %20 (space) and %2F (slash).