Free Structured Data Validator, with the code to fix what is missing
Checks for Organization, WebSite and WebPage, field by field.
- Free, no signup or email
- Reads the JSON-LD on your homepage
- OrganizationRequired
- WebSiteRequired
- WebPageRequired
- BreadcrumbListOptional
Enter a domain above. The schemas your homepage should carry, what is missing from each and the code to add appear here.
Homepage schemas
Not checked3 schemas every homepage should carry, and 1 that is optional.
- OrganizationRequiredNot checked
- WebSiteRequiredNot checked
- WebPageRequiredNot checked
- BreadcrumbListOptionalNot checked
JSON-LD on the page
Not checkedEvery JSON-LD block in the homepage's HTML, with the schema types inside it.
- Block 1
- Block 2
- Block 3
Want structured data checked across your-domain.com?
This read one page. We check structured data and crawler access across your pages, and what an assistant needs to read your site and tell who you are.
- Structured data across your pages
- Crawler access on the same pages
- Free, and you keep the output either way
How it works
How to Validate Your Structured Data
Type a domain and press Validate. Whatever page you paste, the tool reads that site's homepage.
Every application/ld+json block the homepage serves, up to ten, and each schema type inside them.
Organization, WebSite and WebPage checked field by field, and a block to copy for every gap.
Why it matters
Why Structured Data Matters for AI Search
Structured data states what a page is and who publishes it in a form a program reads without interpreting your layout. Google says it uses structured data to understand the content of a page, and recommends JSON-LD as the format.
No AI assistant publishes how much weight it gives structured data, so this page claims no ranking effect. What the markup does is remove guesswork: your name, logo and site are stated once, and every page says which site and which company it belongs to.
- Organization names the publisher: your name, logo and site in one place.
- WebSite and WebPage tie each page to the site, and the site to the company, by @id.
- Valid markup makes a page eligible for the rich results Google offers for its type. Google does not guarantee one.
- It promises neither a Knowledge Graph panel nor a mention in an AI answer.
What it checks
What Our Structured Data Validator Checks
It reads one page, your homepage, and holds it to a short list. Here is the list, and what stays outside it.
- Whether the homepage's HTML holds any JSON-LD, and whether each block parses.
- Every schema type in the first ten blocks.
- Organization: an @id, a description, a logo and an image, both written as ImageObjects.
- WebSite: an @id, a description and a publisher that points at your Organization by @id.
- WebPage: an @id and an isPartOf that points at your WebSite by @id.
- Any page but the homepage. A product or article URL is reduced to its domain.
- Microdata and RDFa. Only JSON-LD is read.
- Markup a script adds after the page loads. The HTML is read as served.
- Whether Google would show a rich result. Its Rich Results Test answers that.
- Whether your values are true: that the logo loads, or the description fits.
- The fields of other types. Product, Article or FAQPage are listed when found, not field-checked.
Complete is our bar for a homepage whose schemas point at each other, not Google's list of required properties. A schema can be valid and still read incomplete here.
Schema reference
Common Structured Data Schema Types
Seven types cover most sites. This tool field-checks the first three on your homepage and lists the others when it finds them.
- Organization
Your company: name, logo, site and profiles. One per site, on the homepage; other pages point at it by @id.
- WebSite
The site itself, and which Organization publishes it. One per site, on the homepage.
- WebPage
One page, and which WebSite it is part of. On every page.
- Article
or BlogPosting
A post: its headline, author and dates. On the post itself, not on a list of posts.
- Product
One product with its offer: price, currency and availability. On the product page.
- FAQPage
Questions and answers the page shows. Google shows its FAQ rich result only for well-known government and health sites; the markup still states the answers plainly.
- BreadcrumbList
The path to a page. On pages that show a breadcrumb trail, so rarely on a homepage.
From check to fix
How to Improve Your Structured Data
- 1
Run the validator on your homepage
It lists what is missing and what is incomplete, in the order to fix them.
- 2
Add what is missing
Copy the block, replace any FILL_IN value, and paste it inside the head of your homepage. One block can hold several schemas.
- 3
Complete what is there
For a schema that lacks fields, the code is your own markup with the missing lines added. Replace the block you have with it.
- 4
Mark up the other pages
Article on posts, Product on product pages, BreadcrumbList where a trail shows. Point each at your Organization and WebSite by @id instead of repeating them.
- 5
Test, then read again
Run Google's Rich Results Test on the page, then come back here. A domain read in the last 10 minutes shows its stored result, so give it ten minutes after you publish.
don't just take our word for it.
Get recommended by AI,
before your competitors are.
Run the free audit
A 30-second check of whether AI can reach, read and recognise your site.
15-minute audit call with one of our experts
We walk through your complete AI visibility audit together.
Your tailored 90-day plan
A roadmap to get your company recommended in AI search.
Will S.
Director of Digital Products
"Awesome customer service and founders that care"
February 13, 2026 · Mid-Market
They're helping companies rank in AI answers, but really their customer service is the best thing about the product.
Wendy Kinney
Founder, Summit Trails
The articles were really well-written and genuinely in our voice. Honestly, I hang on every update you send.
Eugenio G.
Founder
"Brand Visibility Tracking"
February 11, 2026 · Small-Business
Implementation is very easy, with recommendations made by customer support. The founder is also available for answers.
Lóránt Bartha
Founder, Ookulli
When we see which prompts we're ranking in, we can turn the product toward that demand.
Sindram L.
Founder
"Clear AI prompt tracking and traffic insights"
February 14, 2026 · Small-Business
Full visibility of how my brands show up in AI models, and clear data on what to focus on.
Co-Founder
DTC pet wellness brand
RankZero made AI search a channel. It now drives more revenue than our paid social.
Will S.
Director of Digital Products
"Awesome customer service and founders that care"
February 13, 2026 · Mid-Market
They're helping companies rank in AI answers, but really their customer service is the best thing about the product.
Wendy Kinney
Founder, Summit Trails
The articles were really well-written and genuinely in our voice. Honestly, I hang on every update you send.
Eugenio G.
Founder
"Brand Visibility Tracking"
February 11, 2026 · Small-Business
Implementation is very easy, with recommendations made by customer support. The founder is also available for answers.
Lóránt Bartha
Founder, Ookulli
When we see which prompts we're ranking in, we can turn the product toward that demand.
Sindram L.
Founder
"Clear AI prompt tracking and traffic insights"
February 14, 2026 · Small-Business
Full visibility of how my brands show up in AI models, and clear data on what to focus on.
Co-Founder
DTC pet wellness brand
RankZero made AI search a channel. It now drives more revenue than our paid social.
Will S.
Director of Digital Products
"Awesome customer service and founders that care"
February 13, 2026 · Mid-Market
They're helping companies rank in AI answers, but really their customer service is the best thing about the product.
Wendy Kinney
Founder, Summit Trails
The articles were really well-written and genuinely in our voice. Honestly, I hang on every update you send.
Eugenio G.
Founder
"Brand Visibility Tracking"
February 11, 2026 · Small-Business
Implementation is very easy, with recommendations made by customer support. The founder is also available for answers.
Lóránt Bartha
Founder, Ookulli
When we see which prompts we're ranking in, we can turn the product toward that demand.
Sindram L.
Founder
"Clear AI prompt tracking and traffic insights"
February 14, 2026 · Small-Business
Full visibility of how my brands show up in AI models, and clear data on what to focus on.
Co-Founder
DTC pet wellness brand
RankZero made AI search a channel. It now drives more revenue than our paid social.
Will S.
Director of Digital Products
"Awesome customer service and founders that care"
February 13, 2026 · Mid-Market
They're helping companies rank in AI answers, but really their customer service is the best thing about the product.
Wendy Kinney
Founder, Summit Trails
The articles were really well-written and genuinely in our voice. Honestly, I hang on every update you send.
Eugenio G.
Founder
"Brand Visibility Tracking"
February 11, 2026 · Small-Business
Implementation is very easy, with recommendations made by customer support. The founder is also available for answers.
Lóránt Bartha
Founder, Ookulli
When we see which prompts we're ranking in, we can turn the product toward that demand.
Sindram L.
Founder
"Clear AI prompt tracking and traffic insights"
February 14, 2026 · Small-Business
Full visibility of how my brands show up in AI models, and clear data on what to focus on.
Co-Founder
DTC pet wellness brand
RankZero made AI search a channel. It now drives more revenue than our paid social.
Structured data validator questions
What it reads, what complete means, and what to do with the code.