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HTML Data Attribute Extractor

Collect data-* attribute values from each matching element.

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A useful toolkit for text, data, images and calculations.

01
Add your input
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02
Make it yours
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03
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HTML data attribute finder online

Collect data-* attribute values from each matching element. Use this when inspecting structured input or preparing a data or code artifact. Generated commands and configurations remain text until you review and use them yourself.

How to use it

Enter a value or text in the format shown in the example. Choose Run tool. Review the output, then copy or download it.

Worked examples

Use this when inspecting structured input or preparing a data or code artifact. Generated commands and configurations remain text until you review and use them yourself.

Reproducible worked example

Settings: No additional settings.

Input:

<main id="content"><h1>Tools</h1><h3>Examples</h3><a href="https://example.com" target="_blank">Visit</a><a href="/empty"></a><img src="logo.png" alt="Logo"><img src="photo.png"><button>Run</button><form><label for="email">Email</label><input id="email" name="email" type="email" required></form><table><caption>Values</caption><tr><th>Name</th><th>Count</th></tr><tr><td>Anna</td><td>2</td></tr></table><div id="same" class="card blue" data-id="1" aria-label="Card" style="color:red" onclick="demo()"></div><div id="same"></div><style>.blue{color:blue}</style></main>

With the input and settings above, the tool produces:

Output:

[
  {
    "element": "div",
    "id": "same",
    "data": {
      "data-id": "1"
    }
  }
]

The example returns 1 top-level item in an array. Each item is a record; the first record contains “element”, “id”, “data”.

Limitations and common mistakes

Inspects an inert HTML fragment using the browser parser. Markup can be normalized automatically. Findings are hints, not a complete accessibility, security or SEO certification.
Combined input is bounded to 150,000 characters; output text is bounded to 1.2 million characters. Some algorithms impose smaller limits, stated in their error messages.

Frequently asked questions

What format should I enter?

Enter a value or text in the format shown in the example. The worked example shows the supported structure and actual output.

How can I pull out HTML data attributes online?

Enter a value or text in the format shown in the example. Choose Run tool. Review the output, then copy or download it.

Where is my input processed?

The bundled tool processes input in your browser. It does not upload tool input to a conversion service. Other site plugins, analytics, advertising and browser extensions may have separate behavior.