ToolsXpo

Query String Parser

Convert messy URL query strings into beautifully formatted, readable JSON objects instantly.

This tool has an API.Automate it from your code — 1 credit/call.Open in Playground
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Examples & Use Cases

Raw Query String

utm_source=google&utm_medium=cpc&campaign_id=12345&tags=shoes&tags=nike

Parsed JSON

{ "utm_source": "google", "utm_medium": "cpc", "campaign_id": "12345", "tags": [ "shoes", "nike" ] }

Query String to JSON Parser

When debugging web analytics or working with complex REST APIs, query strings can become incredibly long and unreadable. Our Query String Parser takes any raw URL parameter string (e.g., `?foo=bar&baz=1`) and converts it into a clean, properly structured JSON object.

Key Features

  • Array Handling: If a key appears multiple times (e.g., `?tag=a&tag=b`), it automatically groups them into a JSON array.
  • Auto-Decoding: URL-encoded characters (like `%20` for space) are automatically decoded back to readable text.
  • Flexible Input: Paste just the query string (`a=1&b=2`) or an entire URL (`https://site.com?a=1`). The tool automatically strips out the domain to focus on the parameters.

100% Privacy and Security

Query strings often carry sensitive data, such as `access_token` values, email addresses, and temporary auth codes. Because this parser runs exclusively inside your browser utilizing the native `URLSearchParams` API, your tokens are never exposed to a backend server.

Frequently Asked Questions

What if a key has no value?

If a parameter is passed without an equals sign (e.g., `?debug&verbose`), it will be parsed with an empty string as its value in the resulting JSON.

About Query String Parser

Convert messy URL query strings into beautifully formatted, readable JSON objects instantly. It's built for debugging web requests, headers and page behaviour, runs instantly, and works on any device — no install, no sign-up.

How to use Query String Parser

  1. Paste or type your input into the editor on the left.
  2. Leave the defaults, or tweak them if the tool exposes options.
  3. The result appears instantly on the right — everything runs in your browser, so nothing is uploaded.
  4. Copy the output, or download it, and you're done.

Why use Query String Parser?

  • Fast and local — the transform happens in your browser, so there's no round-trip and no waiting.
  • Private by default — your input never leaves your device.
  • Accurate — the same, well-tested logic powers both this page and the public API.
  • Free — unlimited use in the browser, with an optional API for automation.

Use it from the API

Everything this page does is also available as a REST endpoint, so you can call Query String Parser from your own code, a script or a CI pipeline.

Bash
curl "https://api.toolsxpo.com/v1/query-string-parser" \
  -H "Authorization: Bearer txp_live_YOUR_KEY"

The endpoint returns a JSON envelope ({ ok, data, meta }) and costs 1 credit per successful call. Try it in the playground or browse the full API reference.

Frequently asked questions

Is Query String Parser free to use? Yes — use it in the browser as much as you like. The optional API has a free tier and pay-as-you-go pricing for heavy or automated use.

Is my data private? Yes. Query String Parser runs entirely in your browser — your input never leaves your device and nothing is logged or stored.

Can I automate Query String Parser? Yes — call the query-string-parser API endpoint from any language and script it into your workflow.

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