URL Parser & Query Inspector
Parse RFC 3986 URLs, inspect components, and edit query strings & UTM parameters
About URL Parser & Query Inspector
How URL Parser & Query Inspector Works
Uses the standard WHATWG URL and URLSearchParams Web API specifications to decompose URLs into RFC 3986 lexical primitives (origin, protocol, hostname, port, path, query, hash) and allows live bidirectional query parameter manipulation in local memory.
URL Parser & Query Parameter Inspector is a developer utility for decomposing, debugging, and reconstructing RFC 3986 Uniform Resource Identifiers. It breaks complex URLs into protocol/scheme, origin, hostname, port number, path segments, query parameters, basic auth credentials, and hash fragments. The interactive query parameter editor allows software engineers, growth marketers, and QA testers to view decoded query values, add or remove parameters in real time, build campaign UTM tracking tags for analytics, and copy clean or rebuilt URLs without tracking or server roundtrips.
Frequently asked questions
Can this tool parse URLs containing sensitive query parameters (like tokens or API keys)?+
Yes, completely safely. Because parsing executes 100% locally in your browser's memory without sending HTTP requests, sensitive authentication tokens, authorization codes, or user identifiers in URLs are never logged or transmitted to any server.
How does the tool handle repeated query parameters with the same key?+
The parser faithfully preserves all instances of duplicate keys (such as ?tag=react&tag=nextjs). In the JSON view, duplicate keys are automatically aggregated into arrays, matching the behavior of modern backend frameworks like Express, FastAPI, and Django.
What are UTM parameters and why are they important?+
UTM (Urchin Tracking Module) parameters are 5 standard query tags (utm_source, utm_medium, utm_campaign, utm_term, utm_content) appended to URLs to track marketing campaign efficacy in Google Analytics and attribution platforms.
Can I parse relative paths or URLs without a protocol?+
Yes. The parser recognizes relative paths (like /api/v1/items?limit=25) and bare domains (like example.com/login) using resilient WHATWG URL parsing fallbacks.
Limitations
Standard URLs require proper percent-encoding for characters like spaces or control codes. Unescaped invalid characters are parsed with best-effort tolerance.