Schema Preview

A free Chrome and Firefox extension that validates schema.org structured data on any page.

Version: 1.1.2
Updated: October 2, 2026
Price: Free
Browsers: Chrome, Firefox

The short version

What it does

Open any page, click the extension, and see its structured data laid out clearly: which types are present, whether the JSON-LD is valid, and where it’s likely to fall short of a rich result. No copy-pasting URLs into three different validators. No guessing.

Since 1.1 it also previews the share cards Facebook, LinkedIn and X will build from your tags, checks your og:image sizes, and colours the toolbar icon by page health, so you know before you click.

{ "@context": "https://schema.org",
  "@type": "Product", "name": "Desk lamp",
  "offers": { "@type": "Offer", "price": "49.00",
    "priceCurrency": "USD", "availability": "InStock" },
  "image": "https://example.com/lamp.jpg" }

JSON-LD Product · eligible BreadcrumbList Recipe · needs image

94 / 100

Version 1.1.2

A look inside

A Recipe schema scored 34/100 with required, recommended and optional coverage and a missing image error. — Errors name the exact field to fix.

A Product schema marked eligible for a Google rich result, with its search preview showing stars and price. — Google rich-result eligibility, per type.

Scratching our own itch

Why we made it

We kept hitting the same wall on projects — markup that validated in one tool, failed in another, and showed nothing in search. We wanted one fast, honest read on a page’s structured data. So we built it, and then we kept using it.

Install it before you email us

That’s genuinely the point. You can evaluate how we build before you ever start a conversation. If the tool is good, the rest of the work is built by the same hands.

Install for Chrome Install for Firefox Start a project