SeoGuard
Errorstructured.json-ld-parse

Structured data that search engines cannot read

Why it matters

JSON-LD is the block of data behind rich results: review stars, prices, FAQs, breadcrumbs, your logo in the knowledge panel. It has to be valid JSON, and JSON is unforgiving: one trailing comma, a smart quote pasted from a document, or an unescaped " in a product name, and the whole block is discarded. Search Console files it under "Unparsable structured data"; nothing on the page looks wrong, and the rich result simply never appears or quietly disappears.

Source: Unparsable structured data report: "structured data found on your site that could not be parsed because of a serious syntax error". It costs rich results, not indexing.

How to fix it

Paste the block into a JSON validator to find the exact character, fix it, then confirm with Google's Rich Results Test. The usual three causes: a comma after the last item, curly quotes (“ ”) instead of straight ones, and a " or a line break inside a value that needs escaping:

<script type="application/ld+json">
{ "@context": "https://schema.org", "@type": "Organization", "name": "Flour & Co", "url": "https://www.example.com/" }
</script>

If a plugin writes the block, the fault is usually in the text you gave it: look for quotes in titles and descriptions.

Examples

These are the rule's own test pages, and what it says about each. They are run on every change to the rule book.

<script type="application/ld+json">{ “@context”: “https://schema.org”, “@type”: “Organization” }</script>

ErrorA JSON-LD block isn't valid JSON, so search engines discard all of it: Expected property name or '}' in JSON at position 2 (line 1 column 3).

fail-smart-quotes
<script type="application/ld+json">{ "@context": "https://schema.org", "@type": "Product", "name": "Lemon drizzle", }</script>

ErrorA JSON-LD block isn't valid JSON, so search engines discard all of it: Expected double-quoted property name in JSON at position 81 (line 1 column 82).

fail-trailing-comma
<script type="application/ld+json">{"@context":"https://schema.org","@type":"Organization","name":"Flour & Co"}</script>
<script type="application/ld+json">[{"@type":"WebSite","name":"Flour & Co"}]</script>

PassedAll 2 JSON-LD blocks parse.

pass-valid