URL Query String Parser (Decode & Extract URL Parameters Online)
Working with long, encoded URL parameters can be messy. Paste any URL or raw query string into this tool to instantly decode it and break it down into a clean, easy-to-read table. Process runs entirely in your browser safely.
100% Private & Secure
This tool runs completely inside your browser using client-side WebAssembly and JS. Zero data is ever sent to our servers.
Parsed Parameters
How to use this tool
- Copy your full URL or just the query string part (e.g., ?utm_source=google&utm_medium=cpc).
- Paste it into the input area above.
- The tool will instantly parse the parameters and display them in a structured table below.
- Values are decoded automatically (e.g., %20 becomes a space).
Example Usage
https://example.com/shop?product_id=8821&category=shoes&sort=price_asc
product_id: 8821 category: shoes sort: price_asc
?utm_source=newsletter&utm_campaign=summer_sale_2026
utm_source: newsletter utm_campaign: summer_sale_2026
When to use this tool
- Analyzing tracking parameters (UTM tags) on marketing links.
- Debugging API GET request URLs to verify expected parameters are being sent.
- Decoding complex search filters copied from a web browser address bar.
- Reading heavily encoded OAuth redirect URLs.
Frequently Asked Questions
How does the parser handle repeating keys (array parameters)?
When a URL query string contains multiple parameters with the exact same key (e.g., ?filter=red&filter=blue), our parser detects them and displays each distinct key-value pair as a separate row in the table, perfectly mirroring how backend languages like PHP or Node.js interpret array parameters.
Does it decode URL-encoded characters like %20 and %40?
Yes. URL parameters are often heavily encoded (e.g., %20 for a space, %40 for an '@' symbol, or %2B for a plus). The parser utilizes standard JavaScript URLSearchParams to properly decode RFC 3986 percentage-encoded formats into readable plain text.
How do I extract UTM parameters using this tool?
Simply paste the entire tracking link (e.g., https://site.com/?utm_source=google&utm_medium=cpc&utm_campaign=summer_sale) into the tool. It instantly segregates the base URL from the query and isolates your utm_source, utm_medium, and other UTM tags into an easy-to-read table for analysis.
Why do some parameters have no value (empty output)?
In a query string, a parameter can exist simply as a flag. For example, in the URL '?debug=&force_refresh', the 'debug' key has an empty value, and 'force_refresh' is just a top-level key. Our tool accurately displays these as valid keys with an empty corresponding value.
Can this parse hash fragments (#) alongside query strings?
Standard query strings (?) must appear before hash fragments (#) in a valid URI. If you paste a URL like '?session=123#analytics', standard parsers will consider the # as the end of the query string. Our tool follows native URI specifications, ensuring only the exact backend-received query string is parsed.