What input formats are accepted?

You can paste a complete URL such as https://site.com/x?a=1, a string that starts with ?, or just the raw query string a=1&b=2. Any #fragment is removed before parsing.

Are values URL-decoded?

Yes. Percent-encoded sequences like %20 and plus signs used for spaces are decoded so you see the real value, such as "hello world".

How are repeated keys handled?

Each occurrence becomes its own row. So tags=a&tags=b shows two rows, both with the key "tags" — one value a and one value b — rather than merging or overwriting them.

What happens to a key with no value?

A parameter like flag= or a bare flag is shown with an "(empty)" marker in the value column, so you can tell an empty value apart from a missing one.

Does the order of parameters stay the same?

Yes. Parameters are listed in the same order they appear in the query string, which makes it easy to compare against the original link.

Can it parse tracking parameters like UTM tags?

Yes. utm_source, utm_medium, utm_campaign and any other parameters are each broken out into their own row, which is handy for auditing marketing links.

Is anything uploaded?

No. Parsing happens entirely in your browser using the built-in URLSearchParams API, and your URLs are never sent to a server.

Query String Parser — Gera Tools

Parse any query string into key/value pairs

This developer tool breaks a URL or query string into a clean table of keys and decoded values. Paste a link and instantly see exactly which parameters it carries and what each one really contains — with percent-encoding and + spaces already decoded. It is built for debugging links, auditing analytics and UTM tracking tags, and checking what an API request or redirect actually sends.

How it works

The parser accepts three input shapes: a full URL, a string starting with ?, or a bare key=value query string. It first strips any #fragment, then keeps only the part after the first ? (if present), and feeds the rest to the browser’s built-in URLSearchParams API. That API splits on &, separates each key from its value at the first =, and URL-decodes both sides — turning %20 and + into spaces and %2F into /. Each pair becomes one row. Repeated keys are preserved as separate rows rather than collapsed, and empty values are flagged.

Example

Paste this URL:

https://example.com/search?q=hello+world&page=2&sort=desc&tags=a&tags=b

You get five rows:

Key	Decoded value
q	hello world
page	2
sort	desc
tags	a
tags	b

Note that hello+world decodes to hello world, and the two tags parameters each get their own row. Everything runs in your browser — nothing is uploaded.