URL Parser

What is URL Parser?

URL Parser breaks down Uniform Resource Locators into their component parts — scheme, authority (userinfo, host, port), path, query string parameters, and fragment identifier — following RFC 3986. It decodes percent-encoded characters, parses query strings into key-value pairs, identifies IDN (Internationalized Domain Name) punycode encodings, and validates the URL structure against the RFC specification. The tool also reconstructs URLs from modified components for testing and debugging.

Web developers debugging URL-related issues, QA engineers testing URL routing, and marketing analysts dissecting tracking URLs. The tool runs entirely in your browser — your data never leaves your device.

How to Use URL Parser

1. Paste a URL into the input field for automatic parsing
2. View the breakdown of all URL components with decoded values
3. Edit individual components and see the reconstructed URL update in real-time
4. Copy specific components like the decoded query string or path segments

Common Use Cases

• Debugging complex URLs with multiple query parameters to inspect individual values
• Extracting and decoding query string parameters from analytics and tracking URLs
• Validating URL structure before using them in API calls or redirects
• Understanding IDN (punycode) domain encoding for internationalized URLs

Pro Tips

• Query parameter order does not matter per RFC 3986, but some servers treat it as significant — if debugging a URL-dependent issue, compare parameters by name rather than comparing full URL strings, which may differ only in parameter order
• Double-encoding is a common bug — if you see %2520 in a URL, the space was encoded twice (space → %20 → %2520); the parser highlights double-encoded sequences so you can trace encoding issues in your application stack
• The fragment (#hash) is never sent to the server — it is client-side only; if your application relies on fragment values for routing (like single-page apps), those values are invisible to server-side analytics and logging

Why Use This Tool?

• Privacy-first: All processing happens locally in your browser. No data is transmitted to any server.
• No installation required: Works in any modern browser on desktop or mobile.
• Completely free: No account, no credit card, no usage caps.
• Fast and reliable: Powered by modern Web APIs for near-instant results.

Related Concepts

Learn more about related topics: RFC 3986, Query string, Percent encoding, URI components.

Frequently Asked Questions