# Free Schema Markup Checker - JSON-LD Extractor

> Fetch a page and list JSON-LD blocks with their @type values. Catch invalid JSON before you ship. Not a replacement for Google's Rich Results Test.

```yaml
url: "https://www.scrolllaunch.com/tools/schema-markup-checker"
slug: schema-markup-checker
category: onpage
keywords: "schema markup checker, json-ld checker, structured data tester, schema.org validator, json ld extractor"
```

## How to use

1. **Paste a URL** - Any public page that should include JSON-LD.
2. **Read the types** - Confirm the page claims only types you can support with real data.
3. **Fix parse errors** - Invalid JSON means crawlers ignore the whole block.

## How to check schema markup safely

JSON-LD in a script tag is the easiest structured data to maintain. This tool lists every block and the types it claims.

Do not emit SoftwareApplication (or subtypes) unless you have real AggregateRating or Review and a real Offer. Synthetic ratings are a spam signal.

WebPage, BreadcrumbList, FAQPage, and InteractionCounter are enough for most launch pages.

## What you get

- Extract application/ld+json
- List @type and @graph types
- Flag invalid JSON
- Copy raw JSON-LD

## Related tools

- **[FAQ Schema Generator](https://www.scrolllaunch.com/tools/faq-schema-generator)** - Turn Q&A pairs into valid FAQPage JSON-LD for Google rich results - copy a ready <script> tag.
- **[Website SEO Checker](https://www.scrolllaunch.com/tools/seo-checker)** - Free website SEO checker - on-page score and checklist for any URL.
- **[Heading Analyzer](https://www.scrolllaunch.com/tools/heading-analyzer)** - Free heading analyzer - outline H1–H6, flag missing or multiple H1s, copy as Markdown.
- **[llms.txt Generator](https://www.scrolllaunch.com/tools/llms-txt-generator)** - Generate llms.txt and a draft ai.txt so answer engines can understand your site.

## Related

- [All tools](https://www.scrolllaunch.com/tools)
- [Pricing](https://www.scrolllaunch.com/pricing) - launch free; dofollow while the badge stays on your site.
- [Directories](https://www.scrolllaunch.com/directories) - curated startup directories ranked by DR.