Does this tool support URL-encoded (percent-encoded) parameters?

Yes. The parser automatically decodes percent-encoded characters in both keys and values, so %20 appears as a space and %2F appears as a slash in the JSON output.

How are repeated query keys handled?

When a key appears multiple times (e.g., ?tag=a&tag=b), the tool groups them into a JSON array: "tag": ["a", "b"]. Single-occurrence keys remain plain strings.

Is my URL data sent to a server?

No. All parsing runs entirely in your browser using the browser's built-in URL API. Your URLs never leave your device.

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URL to JSON Converter Online Free - Parse Query Strings & Params

Parse URL query strings and parameters into structured JSON online. Handle nested params, arrays, and encoded values instantly in your browser, no upload.

Paste any URL and this tool instantly breaks it into structured JSON—outputting scheme, host, port, path, query parameters (including arrays and nested keys), user info, and fragment as separate fields. No server upload required; parsing runs entirely in your browser.

URL Input

JSON Output

JSON Formatter

URL to JSON Converter for Query Strings, Parameters, and API Debugging

Parse URL query strings into structured JSON, inspect nested parameters and arrays, and decode complex request URLs faster during API debugging.

How it works

This tool parses the query string from any valid URL and converts keys and values into a standard JSON format. It handles nested keys and array parameters automatically.

Why JSON?

JSON (JavaScript Object Notation) is a lightweight data-interchange format that is easy for humans to read and write and easy for machines to parse and generate.

URL Structure & Components Guide

A Uniform Resource Locator (URL) is the address of a unique resource on the Web. Understanding its structure is crucial for web development and SEO.

Understanding URL Components

A URL consists of scheme, user info, host, port, path, query, and fragment. This guide explains each part with examples to improve discoverability.

Scheme (Protocol)

Specifies the protocol, e.g., https, http, ftp.

User Info

Optional username and password before the host, e.g., user:pass@.

Host (Domain)

The domain or IP identifying the server, e.g., example.com.

Port

Optional network port; defaults to 80 (http) or 443 (https).

Path

Hierarchical resource location on the server, e.g., /path/to/page.

Query

Key-value pairs after ?, e.g., ?foo=1&bar=baz.

Fragment (Hash)

Client-side anchor after # pointing to a section, e.g., #section.

Why URL Structure Matters

A well-structured URL improves user experience and helps search engines understand your content relevance. Parameters should be clean, readable, and logically organized.

Common Questions

What is the difference between URI and URL?

A URI (Uniform Resource Identifier) identifies a resource, while a URL (Uniform Resource Locator) also describes how to access it. All URLs are URIs, but not all URIs are URLs.

Why are query parameters important?

Query parameters allow you to pass dynamic data to a webpage, such as search terms, filters, or tracking IDs, without changing the path structure.

How to Use the URL to JSON Converter

1
Paste your URL
Enter any full URL into the input field—HTTP, HTTPS, FTP, or custom schemes are all supported.
2
Click "Convert to JSON"
The parser splits the URL into its RFC 3986 components and serializes them into a structured JSON object.
3
Inspect the output
Review scheme, host, port, path, query (key-value pairs and arrays), userInfo, and fragment in the result panel.
4
Copy or download
Use the Copy button to grab the JSON for your clipboard or Download to save a .json file for later use.

References

RFC 3986 — URI Generic Syntax
The authoritative IETF specification defining URI/URL structure, components, and encoding rules.
MDN — URLSearchParams
Web API for reading and manipulating URL query strings in JavaScript.
RFC 8259 — JSON
The IETF specification for the JSON data interchange format used in the tool's output.

Related Tools

JSON Formatter

Beautify and validate JSON output from your parsed URLs.

URL Encode / Decode

Percent-encode or decode individual URL components.

CSV to JSON

Convert tabular CSV data into structured JSON arrays.

XML to JSON

Transform XML documents into a JSON-compatible object structure.

Frequently Asked Questions

What is the difference between URI and URL?: A URI (Uniform Resource Identifier) identifies a resource, while a URL (Uniform Resource Locator) also describes how to access it. All URLs are URIs, but not all URIs are URLs.
Why are query parameters important?: Query parameters allow you to pass dynamic data to a webpage, such as search terms, filters, or tracking IDs, without changing the path structure.
Does this tool support URL-encoded (percent-encoded) parameters?: Yes. The parser automatically decodes percent-encoded characters in both keys and values, so %20 appears as a space and %2F appears as a slash in the JSON output.
How are repeated query keys handled?: When a key appears multiple times (e.g., ?tag=a&tag=b), the tool groups them into a JSON array: "tag": ["a", "b"]. Single-occurrence keys remain plain strings.
Is my URL data sent to a server?: No. All parsing runs entirely in your browser using the browser's built-in URL API. Your URLs never leave your device.