URL normalize

url-normalize · version 1.0.0 · URLs & IP addresses · free, no key needed

Normalize an absolute http or https URL via WHATWG parse. No DNS, fetch, or security-equivalence claim.

Use when you need to: url normalize · canonicalize http url · normalize https url.

Supported

• url normalize
• canonicalize http url
• normalize https url

Not supported

• fetch
• dns
• punycode security claim
• http equals https

Behavior

• Parse with WHATWG URL. Scheme must be http or https (case-insensitive on input). Reject other schemes, relative URLs, and credentials-less parse failures.
• Always applied: WHATWG href serialization (scheme lowercase, host lowercase ASCII/punycode as WHATWG does, default ports 80/443 omitted, empty path becomes /, dot-segment removal).
• strip_fragment default false; if true, drop the fragment.
• Preserve userinfo if present. Do not sort query. Do not claim two URLs are security-equivalent or same-origin beyond the returned string.
• No network.

Input

• url (string, required): min length 1; max length 8192
• strip_fragment (boolean, optional)

Output

• url (string, required)

Limits

• max url bytes: 8192

Example

Request input:

{
  "url": "HTTP://Example.COM:80/a/../b"
}

Response:

{
  "result": {
    "url": "http://example.com/b"
  }
}

How to call it

MCP

Connect https://computefirst.net/mcp (setup), then call execute with:

{
  "id": "url-normalize",
  "version": "1.0.0",
  "input": {
    "url": "HTTP://Example.COM:80/a/../b"
  }
}

HTTP (no key)

curl -X POST https://computefirst.net/v1/tools/url-normalize/versions/1.0.0/execute \
  -H "Content-Type: application/json" \
  -d '{"url":"HTTP://Example.COM:80/a/../b"}'

The machine-readable contract is at /v1/tools/url-normalize/versions/1.0.0.

CLI

node cli.mjs run url-normalize 1.0.0 --input input.json --base-url https://computefirst.net

Get the client at /clients/cli/.

Related tools

• IPv6 normalize: Normalize any valid textual IPv6 address directly into its RFC 5952 canonical compressed string.
• URL query build: Build a query string or replace an absolute URL query from ordered pairs. No fetching.
• URL query merge: Merge query pairs into an absolute URL. No fetching.
• URL query parse: Parse query pairs and fragment from an absolute URL. Parse only; no fetching.
• URL resolve: Resolve a URL against an absolute http(s) base using WHATWG. No fetching. Result must be http(s).
• IPv4 address classify: Classify an IPv4 address against the static IANA IPv4 special-purpose address registry.