Find a tool

Query String Parser Runs in your browser. No input data is sent to our server.

Paste a query string or URL into the editor, parse it instantly, and inspect the decoded parameters in a readable output block. This page is useful for tracking links, redirects, campaign URLs, API debugging, integrations, and developer workflows.

Parsed query details

Paste content and run the tool instantly.

This tool runs entirely in your browser, so you can inspect, transform, or generate developer text without sending it to a remote processing service.

Parse Query Strings Online

Parse query strings online to inspect decoded parameters, repeated keys, campaign values, and URL parameter structure in your browser. Paste a query string or full URL and the tool lists every key-value pair with percent-encoded characters decoded — useful for reading UTM parameters, OAuth state values, API debug keys, and any URL that carries structured data in its query string.

How to use Query String Parser

1

Paste content into the query string input panel.

2

Run the tool to generate the parsed query details.

3

Copy or download the result once it looks right.

Why this helps in real workflows

Inspecting campaign tracking parameters (utm_source, utm_medium) from a marketing link.

Debugging an OAuth or SSO redirect URL to confirm the required parameters are present.

Reading repeated parameters from a query string where the same key appears multiple times.

Checking what parameters an API call is sending before trying to reproduce a request.

Common problems and fixes

A parameter value contains encoded characters that are hard to read.

The parser decodes percent-encoded values automatically. %20 becomes a space, %2B becomes a plus sign, and so on.

The same parameter key appears multiple times and I only see one value.

The parser lists repeated keys separately so every value for a key like 'quality=90&quality=80' appears as two rows.

I pasted a full URL but the parser only needs the query string.

Full URLs work fine. The parser extracts the query-string portion automatically.

Related tools

Developer Tools Hub Query String Builder URL Parser URL Encoder cURL Converter Markdown Editor & Preview Lorem Ipsum Generator UUID / ULID Generator QR Code Generator SLA Uptime Calculator SLO Error Budget Calculator Hash Generator HMAC Generator Slug Generator Word & Character Counter Case Converter Text Sorter & Deduplicator JSON Diff & Merge JSON Schema Generator BCrypt Hash Generator BCrypt Hash Verifier Diff Checker JWT Decoder JSON Minifier Unix Timestamp Converter Timezone Converter Date Difference Calculator Time Now Color Code Converter CSS Gradient Generator Number Base Converter

Related Guides

How Query Strings Work in URLs How Query Strings Help Tracking and Redirects What Is Base64URL and When Is It Used?

Frequently asked questions

How do I parse a query string?

Paste the query string or full URL into the input box, run the parser, and review the decoded parameter list.

Will this query string parser handle full URLs too?

Yes. If you paste a full URL, the tool reads the query-string portion and parses the parameters.

Does the parser handle repeated keys?

Yes. If the same key appears multiple times — like quality=90&quality=80 — each value is listed separately in the output.

Are percent-encoded values decoded automatically?

Yes. The parser decodes percent-encoded characters so %20 shows as a space and %2B shows as a plus sign.

What's the difference between this and the URL parser?

The URL parser breaks apart the full URL — protocol, host, path, query string, hash. This tool focuses specifically on the query string and returns each parameter as a key-value pair.

Is this query string parser free?

Yes. It is free to use in your browser.