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Check a public page

Enter a URL in the settings and run the check. Our server fetches the page through an SSRF-safe fetcher, analyses it in memory and stores nothing.

Schema Markup Validator online, free

Extract JSON-LD and microdata and check the required properties for Article, Product, FAQ, HowTo, Breadcrumb and other rich results.

  • Runs in your browser — no upload
  • Free, no sign-up, no watermark
  • HTML
  • JSON
  • TXT

How to use Schema Markup Validator

  1. 1

    Add your HTML, JSON and TXT file

    Drop a file on the page, paste it, or click Select Files. Nothing is uploaded — it opens straight in your browser.

  2. 2

    Fine-tune the settings

    Set source in the Fine-tune panel, or keep the defaults — they suit most files.

  3. 3

    Run Schema Markup Validator

    Press the start button. Processing happens on your device, usually in seconds.

  4. 4

    Download the result

    Save the finished file, or continue with another tool without downloading in between.

What Schema Markup Validator can do

  • Source — Fetch a public URL, or paste the code and keep it on your device
  • Private by design — files are processed in your browser and never uploaded
  • Free with no sign-up, no watermark and no daily limit

Schema Markup Validator — frequently asked questions

Is the Schema Markup Validator really free?

Yes. The Schema Markup Validator is free forever on Sada Files — no ads, no premium tier and no account. Server-side fetches have a fair-use rate limit per visitor so the service stays fast for everyone.

Do I need to sign up?

No. There is no account system at Sada Files. Open the page, enter a URL or paste your code, and read the report.

Is my HTML uploaded in paste mode?

No. Paste mode extracts and checks the structured data in your browser. Fetch mode downloads the page through our SSRF-safe fetcher (public addresses only, 10 s, 5 MB) and stores nothing.

Which formats and types does it understand?

JSON-LD (including @graph and nested objects) and microdata (itemscope, itemtype, itemprop). It checks the properties Google requires and recommends for Article, NewsArticle, BlogPosting, Product, FAQPage, HowTo, BreadcrumbList, Organization, WebSite, VideoObject, ImageObject and software app listings.

What is the difference between an error and a warning?

An error is a missing required property or invalid JSON — the page cannot get that rich result. A warning is a recommended property that would make the result richer.

Does passing guarantee a rich result?

No. Google decides whether to show rich results. Valid markup makes a page eligible; content quality and policies decide the rest.

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