Utilities

URL Parser

Parse and analyze URL components (protocol, host, path, query, hash)

URL

About

URL parser that breaks down any URL into its full component structure (protocol, host, port, pathname, search, hash, username, password, origin). Displays query parameters in a table with encoded/decoded value toggle, includes a URL builder for constructing URLs from components, supports encoding/decoding individual components, URL normalization (lowercase host, remove default ports, etc.), and resolves relative URLs against a base URL.

URLs contain many components and complex query strings that are hard to dissect manually. This tool provides a structured breakdown, query parameter table, and URL builder so developers can inspect, modify, and construct URLs with confidence.

Who should use this tool?

Web developers, API integrators, security analysts, and anyone who works with URL parsing, manipulation, or debugging.

Common use cases

Break down a complex URL to understand its components (protocol, host, query, hash)
Parse query string parameters from a callback URL and see both encoded and decoded values
Build a URL from scratch using the URL builder by filling in component fields
Normalize a user-entered URL for consistent storage (lowercase host, remove default port)
Resolve a relative URL (e.g., "./about") against a base URL to get the absolute URL
Encode or decode individual components of a URL to fix encoding issues

How to Use

Paste a full URL into the input field; the parsed components appear immediately in a structured breakdown.

Scroll to the Query Parameters table to see each parameter with its name, encoded value, and decoded value.

Toggle the Show Decoded switch in the query table to see all decoded values at once.

Use the URL Builder tab to construct a URL by filling in protocol, host, port, path, query, and hash fields.

Click Normalize to lowercase the host, remove default ports (80/443), and decode unnecessary percent-encoding.

In the Resolve tab, enter a base URL and a relative URL to compute the absolute result.

Examples

Input: "https://user:[email protected]:8080/path/to/resource?name=hello%20world&page=1#section" → Components: protocol https, host api.example.com, port 8080, username user, pathname /path/to/resource, query parameters [{name: "hello world"}, {page: "1"}], hash #section

Input: base "https://example.com/docs/" and relative "../images/logo.png" → Resolved: "https://example.com/images/logo.png"

Best Practices

Use the query parameter table to inspect encoded values — many APIs double-encode query strings
Check the decoded column in the query table to detect potentially malicious or malformed values
Use the URL builder when constructing APIs endpoints to ensure all components are correctly placed
Normalize URLs before storing them in a database to avoid duplicate entries for the same resource
Use relative URL resolution to validate href attributes in HTML documents during migration

Common Mistakes

Assuming the port is always present — it is omitted for default ports (80 for HTTP, 443 for HTTPS)
Treating the query string as a JSON object — duplicate keys are valid in URLs and appear as separate rows
Forgetting that hash fragments are never sent to the server — they are client-side only
Using the full URL parser for relative URLs — it requires an absolute URL; use the Resolve tab instead
Overlooking the username:password@ syntax — modern browsers hide it, but the parser exposes it

FAQ

Can it parse URLs without a protocol (e.g., "example.com/path")? No

a protocol is required. Prepend "https://" to parse protocol-relative URLs.

What happens with internationalized domain names (IDN)? They are shown punycode-encoded (xn--) in the host field and decoded in a separate label.

Are URL fragments retained during normalization? Yes

fragments are preserved unless explicitly removed via an option.

How are duplicate query parameters displayed? Each occurrence is shown as a separate row in the query table with its original order preserved.

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Learning Resources

Dive deeper with our comprehensive guides and tutorials.

URL Parser - Beginner's Guide

5 min read

URL Parser Advanced Techniques

8 min read

About

Who should use this tool?

Web developers, API integrators, security analysts, and anyone who works with URL parsing, manipulation, or debugging.

Common use cases

Break down a complex URL to understand its components (protocol, host, query, hash)
Parse query string parameters from a callback URL and see both encoded and decoded values
Build a URL from scratch using the URL builder by filling in component fields
Normalize a user-entered URL for consistent storage (lowercase host, remove default port)
Resolve a relative URL (e.g., "./about") against a base URL to get the absolute URL
Encode or decode individual components of a URL to fix encoding issues

How to Use

Paste a full URL into the input field; the parsed components appear immediately in a structured breakdown.

Scroll to the Query Parameters table to see each parameter with its name, encoded value, and decoded value.

Toggle the Show Decoded switch in the query table to see all decoded values at once.

Use the URL Builder tab to construct a URL by filling in protocol, host, port, path, query, and hash fields.

Click Normalize to lowercase the host, remove default ports (80/443), and decode unnecessary percent-encoding.

In the Resolve tab, enter a base URL and a relative URL to compute the absolute result.

Examples

Input: "https://user:[email protected]:8080/path/to/resource?name=hello%20world&page=1#section" → Components: protocol https, host api.example.com, port 8080, username user, pathname /path/to/resource, query parameters [{name: "hello world"}, {page: "1"}], hash #section

Input: base "https://example.com/docs/" and relative "../images/logo.png" → Resolved: "https://example.com/images/logo.png"

Best Practices

Use the query parameter table to inspect encoded values — many APIs double-encode query strings

Check the decoded column in the query table to detect potentially malicious or malformed values

Use the URL builder when constructing APIs endpoints to ensure all components are correctly placed

Normalize URLs before storing them in a database to avoid duplicate entries for the same resource

Use relative URL resolution to validate href attributes in HTML documents during migration

Common Mistakes

Assuming the port is always present — it is omitted for default ports (80 for HTTP, 443 for HTTPS)

Treating the query string as a JSON object — duplicate keys are valid in URLs and appear as separate rows

Forgetting that hash fragments are never sent to the server — they are client-side only

Using the full URL parser for relative URLs — it requires an absolute URL; use the Resolve tab instead

Overlooking the username:password@ syntax — modern browsers hide it, but the parser exposes it

FAQ

Can it parse URLs without a protocol (e.g., "example.com/path")? No

a protocol is required. Prepend "https://" to parse protocol-relative URLs.

What happens with internationalized domain names (IDN)? They are shown punycode-encoded (xn--) in the host field and decoded in a separate label.

Are URL fragments retained during normalization? Yes

fragments are preserved unless explicitly removed via an option.

How are duplicate query parameters displayed? Each occurrence is shown as a separate row in the query table with its original order preserved.

URL Parser

About

Who should use this tool?

Common use cases

How to Use

Examples

Best Practices

Common Mistakes

FAQ

Related Tools

Same Category — Utilities

Word Counter

Regex Tester

Markdown Preview

IP Address Calculator

Popular Tools

JSON Formatter

Base64 Encoder/Decoder

JWT Decoder

Learning Resources

Share

URL Parser

About

Who should use this tool?

Common use cases

How to Use

Examples

Best Practices

Common Mistakes

FAQ

Related Tools

Same Category — Utilities

Word Counter

Regex Tester

Markdown Preview

IP Address Calculator

Popular Tools

JSON Formatter

Base64 Encoder/Decoder

JWT Decoder

Learning Resources

Share