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Query String Parser

Turn a query string or URL into a readable table of parameters.

Free browser toolRuns in your browserNo sign-up
Query parameter inspector

Decode query strings without losing duplicate keys or empty values

Paste a raw query string or complete URL and inspect each decoded key-value entry in source order.

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parameters

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unique keys

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duplicates

Query string or URL

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Decoded parameters

0 entries
Parsed parameters appear here live.
Private by design. Input is processed inside this browser tab and is not sent to ToolsOnDuty.

About the Query String Parser

A query string is the part of a URL after the question mark, holding key/value pairs separated by ampersands.

Paste a query string or a full URL and this tool decodes it into a readable table of parameters.

It handles repeated keys, plus-encoded spaces and percent-encoding, all in your browser.

Key features

  • Parse a query string or full URL
  • Preserves repeated keys and source order
  • Shows total entries, unique keys and duplicate count
  • Copy or download a structured JSON report
  • Private, runs in your browser

How to use

  1. 1Paste a query string or complete URL, or load the duplicate-key sample.
  2. 2Review the decoded entries in source order.
  3. 3Check total, unique-key and duplicate metrics.
  4. 4Copy or download the JSON parameter report.

Examples

Parse a query string
Input: utm_source=google&utm_medium=cpc
Output: utm_source = google, utm_medium = cpc

Each key and value pair from the query string is listed separately.

Frequently asked questions

Can I paste a whole URL?
Yes. The tool takes everything after the question mark, so a full URL works too.
How are repeated keys handled?
Each occurrence is listed as its own row, so you can see every value for a repeated key.
Does it decode encoded values?
Yes. Percent-encoding and plus-encoded spaces are decoded so you see the readable value of each parameter.

Continue your workflow

Open a related tool to prepare your files or refine the finished result.