This product was not featured by Product Hunt yet. It will not be visible on their landing page and won't be ranked (cannot win product of the day regardless of upvotes).
Give it a page URL, or paste JSON-LD or HTML, and get a JSON report on the schema.org structured data: every JSON-LD block is parsed and checked for @context, @type, required and recommended properties of common rich-result types and typical value mistakes. Coded issues with JSON paths, a grade (A+ to F) and a score out of 100. For SEO audits and CI gates.
Hi everyone, this is JSON-LD Structured Data Validator API.
Give it a page URL (or paste JSON-LD or HTML) and it extracts every JSON-LD block, parses it, resolves @graph and @id references and validates each node. You get JSON back: coded issues with a JSONPath-style location, an overall grade (A+ to F), a score out of 100, and for each rich-result type whether its required properties are present.
Checks cover @context and @type, required and recommended properties of common Google rich-result types (Article, Product, Offer, Review, BreadcrumbList, FAQPage, Event, Recipe, VideoObject, JobPosting, LocalBusiness and more) and typical value mistakes such as non-ISO dates, relative URLs, prices with currency symbols and invalid currency codes. Other types get generic checks only.
The richResults field only means no required-property errors were found; it does not guarantee that Google will show a rich result, and Google's own tools remain the final word. The score uses our own weighting.
Two endpoints:
- GET /v1/check?url= reads the page (up to 5 redirects, first 2 MB of HTML) and validates its JSON-LD. Cached for 6 hours per URL; fresh=1 bypasses the cache.
- POST /v1/validate checks JSON-LD or HTML you send in (up to 256 KB), offline, with no outbound request.
Limits: only JSON-LD in the served HTML is validated (no JavaScript rendering; Microdata and RDFa are detected but not validated). Sites that block datacenter traffic return grade unchecked. Private-network targets are rejected.
Examples measured on 2026-10-16: en.wikipedia.org/wiki/Cat scored A+ (97) and schema.org scored A (95), both with no errors or warnings.
Where to find it: RapidAPI (public, https://rapidapi.com/tossneon0/a...), API.Market and APIHub; Zyla is in review. Product site: https://jsonld.glowhalo.org
Feedback on the checks and the scoring is welcome.
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About JSON-LD Structured Data Validator API on Product Hunt
“Validate a page's schema.org JSON-LD, as JSON”
JSON-LD Structured Data Validator API was submitted on Product Hunt and earned 0 upvotes and 1 comments, placing #300 on the daily leaderboard. Give it a page URL, or paste JSON-LD or HTML, and get a JSON report on the schema.org structured data: every JSON-LD block is parsed and checked for @context, @type, required and recommended properties of common rich-result types and typical value mistakes. Coded issues with JSON paths, a grade (A+ to F) and a score out of 100. For SEO audits and CI gates.
JSON-LD Structured Data Validator API was featured in API (98.8k followers) on Product Hunt. Together, these topics include over 12.5k products, making this a competitive space to launch in.
Who hunted JSON-LD Structured Data Validator API?
JSON-LD Structured Data Validator API was hunted by GlowHalo. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
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