Asset Reference Checker

2 reference(s): 0 missing, 0 external.

How it works

• Extracted every src/href attribute and every CSS url() reference.
• Classified each reference as external (scheme, protocol-relative or fragment) or local.
• Normalised the local path (stripped query/fragment and a leading ./ or /) and matched it against the file list.

• The file list is a newline/comma separated set of repository paths; with no list the references are reported but marked unchecked.
• SPA routes, server rewrites and trailing-slash rules are not modelled; a `missing` result means the literal path is absent from your list.

Methodology

1. Extract src/href attributes and CSS url() references with a global match.
2. Classify each as external (absolute, protocol-relative, scheme or fragment) or local.
3. Normalise local paths and compare them to the supplied file set.
4. Report totals plus the missing and external references with line numbers.

Usage

1. Paste the HTML or CSS to scan.
2. Optionally paste the list of files that exist, one per line or comma separated.
3. Read the missing and external references with their line numbers.

Examples

These are examples, not current values: they use fixed inputs, while the interactive tool computes live results in your browser.

One broken asset

{
  "html": "<img src=\"images/logo.png\"><link href=\"styles/app.css\" rel=\"stylesheet\">",
  "files": "images/logo.png\nstyles/app.css"
}

Missing stylesheet

{
  "html": "<link href=\"../css/main.css\" rel=\"stylesheet\"><img src=\"/img/hero.jpg\">",
  "files": "img/hero.jpg"
}

CSS url() reference

{
  "html": ".hero { background: url('./bg/hero.webp'); }",
  "files": "bg/hero.webp"
}

Limitations

What counts as a local reference

A reference is local when it has no scheme (`https:`, `data:`, `mailto:`), is not protocol-relative (`//host`) and is not a bare fragment (`#id`). Those are reported as external and never fetched.

Local paths are normalised: a leading `./` or `/` is removed and any `?query` or `#fragment` is stripped, so `app.js?v=3` matches a listed `app.js`.