Extract, decode, and inspect every query string parameter from any URL instantly — with UTM detection, encoding analysis, duplicate flagging, and multi-format export.
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A complete toolkit for developers, SEOs, and marketers who work with query strings daily.
Extract all key-value pairs from any URL or raw query string in milliseconds. Handles complex nested values.
Automatically decodes %20, %26, +, and all percent-encoded characters so you see the real values.
Instantly identifies utm_source, utm_medium, utm_campaign, utm_term, and utm_content analytics parameters.
Construct URLs from scratch by adding key-value pairs with auto-encoding — ideal for campaign tracking.
Export results as JSON, CSV, PHP Array, JS Object, or plain Key=Value — copy or download with one click.
Detects duplicate keys, empty values, malformed encoding, and other query string issues automatically.
Splits URLs into protocol, host, path, fragment, and query string — giving you the complete picture.
Standalone encoder and decoder for any text string — test exactly how a browser will interpret your values.
Counts total parameters, unique keys, encoded values, duplicates, and empty values at a glance.
No setup, no login. Paste and parse.
Enter any full URL or raw query string into the input area above — even long ones with dozens of parameters.
The tool splits the query string, decodes every value, detects UTM tags, flags duplicates, and builds the URL breakdown table.
Choose your output format — JSON, CSV, PHP, JS — and download or copy to clipboard instantly.
A URL query parameter is a key-value pair embedded in a web address to transmit data between a browser and a server. The query string begins with a question mark (?) immediately after the URL path, and individual query string parameters are chained together using ampersands (&). For example, in the URL https://shop.com/search?q=shoes&color=red&page=2, the three query parameters are q=shoes, color=red, and page=2.
Understanding URL parameters is fundamental for developers building dynamic web applications, SEO professionals auditing crawl paths, and digital marketers analyzing campaign tracking links. The URL query string is the primary mechanism used by UTM parameters — tags like utm_source, utm_medium, and utm_campaign — which allow analytics platforms to attribute traffic accurately.
A URL parser or URL splitter extracts each segment of a URL — protocol, hostname, pathname, fragment, and the full query string — so you can inspect them independently. When a value contains spaces, special characters, or non-ASCII text, it must be percent-encoded before inclusion in a URL. The URL encoder replaces unsafe characters with their %XX hexadecimal equivalents (e.g., a space becomes %20), while a URL decoder reverses that transformation.
Common use cases for a query parameter parser include debugging broken tracking URLs, validating affiliate links, reverse-engineering third-party redirects, auditing duplicate parameters that confuse crawlers, and constructing clean URLs for A/B test variants. Duplicate query keys — the same parameter name appearing twice — can cause unpredictable server behavior and should be identified and resolved. This online URL analyzer flags duplicates, empty values, and encoding anomalies so you can correct them before they affect analytics or SEO.
From a search engine optimization perspective, URLs with excessive or poorly structured query strings may be treated as duplicate content. Using canonical tags, robots directives, or URL normalization rules in robots.txt in combination with a clean query string structure helps search engines index the right page version. This free URL query string tool gives you the visibility to make those decisions confidently.
Answers to common questions about URL query parameters and this tool.
?). Multiple parameters are separated by ampersands (&). They pass data between pages or to servers without changing the base URL path — e.g., ?id=5&lang=en.&, decodes percent-encoded values, and displays each parameter in a structured table with detected tags.?, such as key1=val1&key2=val2. A query parameter is one individual key-value pair within that string, such as key1=val1.utm_source, utm_medium, utm_campaign, utm_term, and utm_content — with a purple tag in the results table.rel=canonical directive and Google Search Console's URL parameter settings to manage this.Access our full library of testing tools and AI-powered utilities — all free, no signup required.