How to use HTML Microdata to JSON-LD Extractor
- Paste HTML containing the supported itemscope/itemprop declarations.
- Enter the local base and the context you want included in the draft.
- Compare extracted items and property locations with omissions before using the JSON.
Example: HTML Microdata to JSON-LD Extractor
Extract supported microdata from inert supplied HTML into a JSON-LD draft with a property map and omission findings.
You add
HTML source: "<article itemscope itemref=\"topic\" itemtype=\"https://schema.org/Article\" itemid=\"https://example.org/articles/first\">\n <h1 itemprop=\"headline\">A short example</h1>\n <p itemprop=\"description\">Demonstrates <strong>microdata</strong> extraction.</p>\n <time itemprop=\"datePublished\" datetime=\"2026-10-04T09:00:00Z\">4 October 2026</time>\n <div itemprop=\"author\" itemscope itemtype=\"https://schema.org/Person\">\n <span itemprop=\"name\">Alex Example</span>\n <link itemprop=\"url\" href=\"/people/alex\">\n </div>\n <ul>\n <li itemprop=\"about\">Related</li>\n </ul>\n</article>\n<p id=\"topic\" itemprop=\"about\">Microdata basics</p>\n<div itemscope itemtype=\"https://schema.org/Thing\"><span itemprop=\"name\">Orphan item without itemprop</span></div>"
Base URL: "https://example.org/"
JSON-LD context to include: "{\n \"@vocab\": \"https://schema.org/\"\n}"
You get
Extracted 3 items and 9 properties with 0 findings.
Options
- Base address
- Relative supported URL values resolve locally against the entered base. No address or context is requested.
- Item relationships
- Nested items and supported itemref values follow the declared bounded rules. Missing or cyclic references are reported for review.
Supported inputs and limits
Up to 200,000 HTML characters with bounded items, nodes, depth and references. Up to 100 items, 2,000 properties, 6,000 nodes and 20 item levels. Microdata subset only; no remote context retrieval, RDFa conversion, full semantic validation or rich-result eligibility guarantee.
Where your input is processed
This tool processes your input in this browser. Your text and files are not uploaded to UseFreeTools. Check this tool's limits for anything it may save on your device.
Extraction does not validate a rich result
The draft reflects supplied microdata within a limited subset. Unsupported RDFa or scripts do not become verified linked data through this conversion. Check property meanings and the included context before publishing the result.
Questions about HTML Microdata to JSON-LD Extractor
Does it scrape a URL?
It reads pasted HTML without fetching a page.
Will RDFa also be converted?
This extractor handles the supported microdata subset only.
Can I publish the draft without checking it?
Review the property map, omissions and context against the original HTML first.