Web ToolkitLOCAL UTILITY FIELD KIT
English한국어日本語
All tools

TOOL / 17

Query String Parser & Builder

Inspect repeated and encoded URL parameters as structured JSON, or turn a JSON object into an encoded query string.

Your data stays in this browser
Local-firstYour data stays in this browser

FIELD NOTES

Working with URL parameters

A query string carries key-value pairs after a URL question mark. Repeated keys can represent multiple selections and percent-encoding protects reserved characters.

Parameter interpretation is application-specific. Values remain strings unless your application explicitly validates and converts them.

NEXT OPERATIONS

01

JSON Formatter & Validator

Format, minify and validate JSON with precise error feedback.

Open tool
02

Base64 Encoder & Decoder

Encode Unicode text to Base64 or decode it back safely.

Open tool
07

JWT Decoder

Inspect JWT headers, payloads and expiration times locally.

Open tool

REFERENCE

Common questions

How are repeated keys represented?

One value stays a string; repeated values become an array in the parsed JSON.

Does this tool upload my input?

No. Processing uses browser APIs and the input is not sent to our server.