Query String Parser

The Query String Parser takes a full URL or a raw query string and breaks it into a clear table of individual parameters, decoding each key and value so you can read them at a glance. It strips everything up to the question mark and ignores any trailing fragment, so you can paste an entire link straight from your address bar or your logs without editing it first.

This tool is built for developers, QA engineers, marketers and analysts who constantly inspect URLs containing tracking tags, filters, pagination tokens and campaign parameters. Instead of squinting at a long string of ampersands and percent-encoded characters, you get one row per parameter with the value fully decoded, making it obvious what each part of the URL is actually doing.

Parsing runs entirely in your browser using the standard URL parameter engine, so nothing you paste is ever uploaded. Percent-encoded characters and plus signs are decoded, repeated keys are each shown on their own row, and the result is presented as a sortable, exportable table you can copy into a ticket, a spreadsheet or your documentation.

Features

• Accepts a full URL or a bare query string and automatically isolates the part after the question mark for parsing.
• Ignores any URL fragment after the hash so anchor identifiers never pollute your parsed parameter list.
• Decodes percent-encoded characters and converts plus signs into spaces, revealing the true human-readable value of each field.
• Lists every occurrence of a repeated key on its own row, so multi-value parameters such as filters are never silently merged.
• Presents parameters as a clean two-column table of keys and values that is easy to scan, sort and copy.
• Reports how many parameters were found and how many distinct keys they use, giving a quick structural summary.
• Handles empty values and keys without a value gracefully, showing them as blank rather than failing to parse.
• Runs fully in your browser with no uploads, keeping URLs that contain tokens or internal parameters private.

How to use Query String Parser

1. Paste a complete URL or just its query string into the input box, including the leading question mark if you have it.
2. Let the parser run automatically and read the resulting table, where each row shows one parameter key and its decoded value.
3. Scan the decoded values to confirm that tracking tags, filters or tokens contain exactly what you expected.
4. Look for repeated keys, which appear as separate rows, to understand multi-value parameters such as selected categories.
5. Check the stats to see the total number of parameters and the count of unique keys for a fast sanity check.
6. Export the table to copy it into a ticket, paste it into a spreadsheet or include it in your documentation.

Benefits

• Developers debug API requests and redirects by seeing exactly which parameters and values a URL is carrying.
• QA engineers verify that links generated by an application include the correct, properly encoded query parameters.
• Marketers audit campaign URLs to confirm that UTM tags and tracking parameters are present and spelled correctly.
• Analysts pull apart logged URLs to understand user filters, search terms and pagination without manual decoding.
• Support engineers paste a customer-supplied link to quickly identify a malformed or missing parameter causing an issue.
• Anyone learning how URLs work can see encoding, ampersands and repeated keys translated into a plain, readable table.

A query string follows a simple but easy-to-misread structure: a leading question mark, then key=value pairs joined by ampersands, with reserved characters percent-encoded and spaces often written as plus signs. The parser reverses all of that, so a value like %40 becomes an at sign and a plus becomes a space, letting you read the genuine content instead of its transport encoding.

Repeated keys are a common source of confusion. Many frameworks send the same key several times to represent a list, for example a set of selected filters or tags. Rather than keeping only the last value, this parser shows every occurrence as its own row, so you can see the complete multi-value parameter exactly as the server would receive it.

All parsing is performed locally with the browser standard parameter engine, so nothing you paste leaves your machine, which matters because URLs frequently embed session tokens, signed parameters and internal identifiers. The tool only reads the query portion and never modifies your URL, giving you an accurate, private breakdown you can trust.