#439 · Developer Tool

HTML Class Name Extractor

HTML Class Name Extractor turns raw html document or fragment into a result you can review and reuse. It reports concrete counts and diagnostics instead of hiding the parsing step. Processing stays in the browser, so you can test snippets without setting up a database, server, or build command. Invalid input produces a focused message before any output is generated.

Developer Input

Class inventory
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How to use this developer tool

  1. Paste html document or fragment or load the included sample.
  2. Adjust the available option if the tool shows one.
  3. Select Extract Classes or press Ctrl/Cmd + Enter.
  4. Review the summary and diagnostics, then copy or download the result.

What this developer tool does

The output is a static analysis of the supplied markup. It is intended for inspection and editing before the content is used in a project.

The parser validates the expected input shape, extracts tool-specific structures, and builds both a readable result and structured CSV/JSON data.

Nothing is submitted to a database or executed as application code. Treat the output as a review aid, especially when production behavior depends on server versions or runtime-generated markup.

Example

Load the sample and run the tool. The result lists the parsed records in a copy-ready format while the stat cards show counts derived from the same input.

<main class="layout page-shell">
  <article class="card card--featured">
    <h2 class="card__title text-lg">Hello</h2>
  </article>
</main>

Use cases

  • Review a snippet during a code review.
  • Turn copied console or source text into a consistent format.
  • Export an inventory for documentation or a migration checklist.
  • Spot input mistakes before testing against a live environment.

Tips for reliable output

  • Test a small representative sample before processing a large file.
  • Keep the original input until you have reviewed the output.
  • Use JSON export when another script needs structured records.
  • Check version-specific behavior in the relevant official documentation.
  • Do not treat static parsing as proof of runtime correctness.

Processing details

All parsing runs with standard browser APIs and the tool-specific JavaScript embedded in this page. The main output, stat cards, CSV rows, and JSON export are generated from one parsed result so their counts remain aligned.

Scripts are not executed and external resources are not loaded. Browser error recovery can normalize malformed HTML, so inspect the source when exact parser errors matter.

Frequently asked questions

What input does the HTML Class Name Extractor accept?

Paste html document or fragment. The page processes the text locally in your browser.

Does the HTML Class Name Extractor send source code to a server?

No. Its core processing runs in the browser and does not make a network request.

What happens when the input is malformed?

The result area stays empty and a specific error message identifies the input that needs attention.

Can I download the HTML Class Name Extractor result?

Yes. Run the tool, then use Download for the main text output or the available CSV and JSON exports.

What are the limits of this html class name extractor?

It parses HTML with the browser DOM parser. It does not execute scripts, load external resources, or observe markup created at runtime.

Output fields

FieldMeaning
Main outputCopy-ready text produced by the parser
SummaryCount and status for the current run
CSV / JSONStructured records for follow-up work