Schema Markup (JSON-LD) Generator

Schema markup generator: build valid JSON-LD structured data

This schema markup generator turns a short form into ready-to-paste JSON-LD structured data, so search engines understand exactly what your page contains. Pick a type — Article, Product, FAQ, LocalBusiness, and more — fill in the fields, and copy the generated <script type="application/ld+json"> block straight into your page. It runs free in your browser with no signup and produces clean json-ld schema markup that follows the schema.org vocabulary Google recommends. No hand-counting brackets, commas, or quotes.

Structured data does not change what visitors see. It talks to crawlers, labelling one value as a price, another as a rating, another as the author. Get it right and your page becomes eligible for rich results — star ratings, FAQ accordions, breadcrumb trails — that make your listing bigger and more clickable in search.

How to use the schema markup generator

1. Choose the schema type that matches your page (Article for a blog post, Product for a store item, and so on).
2. Fill in the fields that type needs — title, author, dates, price, ratings.
3. Watch the tool build valid JSON-LD as you type, and review it for accuracy.
4. Copy the full <script> block and paste it into your page's HTML, ideally inside the <head>.
5. Validate with Google's Rich Results Test and the Schema.org validator before publishing.

Because this json-ld schema markup generator runs client-side, nothing you type is uploaded. Generate as many blocks as you need, free.

Why JSON-LD beats Microdata and RDFa

There are three ways to add structured data: Microdata, RDFa, and JSON-LD. Microdata and RDFa weave attributes through your visible HTML, which is fiddly to add and easy to break during a redesign. JSON-LD is a single, self-contained script block that sits apart from your content. Google explicitly recommends it because it is the easiest to add and maintain. That is the practical answer to "what is json-ld schema markup": one tidy block of JavaScript object notation describing your page in schema.org terms, which is exactly what this tool outputs.

Pair structured data with solid on-page tags. Build your title and description with the Meta Tag Generator, then confirm everything renders with the Meta Tag Analyzer. Meta tags describe the page to humans in the snippet; schema describes it to machines.

Common schema.org types reference

How structured data earns rich results

Rich results are the enhanced listings you see in Google beyond a plain blue link: review stars under a product, an expandable set of questions under an article, a recipe card with a photo and cook time, a breadcrumb trail above a title. Each of those is unlocked by a specific schema type with specific required fields. Google reads your JSON-LD, confirms it matches the visible page, and then decides whether the page is eligible. Eligibility is not a guarantee — Google chooses when to show a rich result — but without valid structured data you are not even in the running.

This is why choosing the right type and filling its required fields matters so much. A Product block without an offers price will not produce a price snippet. An FAQPage block needs each question paired with an acceptedAnswer. A Recipe needs a name and ingredients to show the card. The generator prompts you for the fields each type expects, so you are far less likely to ship a block that validates technically but misses the properties a rich result actually needs.

What a JSON-LD block looks like

Every block has the same skeleton: a context, a type, and the properties for that type. In plain terms, @context is always https://schema.org, @type names the thing — say Article — and then you add the relevant fields like headline, author, datePublished, and image. The generator assembles all of it so the punctuation is always valid. That is where hand-written schema markup json-ld most often fails: a single missing comma or stray quote invalidates the whole block.

It also helps to know where this block belongs. JSON-LD goes inside a <script> tag with the type application/ld+json, and that script can sit in either the <head> or the <body> of your page. The <head> is the common choice because crawlers find it early, but Google reads both. One page can carry several blocks — for example a BreadcrumbList describing the navigation path plus an Article describing the main content — as long as each block honestly reflects something on the page. Keep one authoritative block per entity, and you avoid the conflicting signals that confuse crawlers.

Mistakes to avoid

• Marking up content that is not on the page. Structured data must match what users can see. Inventing reviews or prices breaks Google's guidelines and can trigger a manual penalty.
• Choosing the wrong type. Tagging a category page as a Product, or a blog as a Recipe, confuses crawlers. Match the type to what the page truly is.
• Skipping validation. One bad character breaks the block. Always run the Rich Results Test before shipping.
• Leaving out required properties. Each type has fields Google needs to show a rich result; dropping image from an Article can disqualify it.
• Stacking conflicting blocks. Two different Product schemas on one page send mixed signals. Keep one authoritative block per entity.

Keeping schema accurate over time

Structured data is not a set-and-forget task. The moment your markup drifts from what is on the page, it works against you: a price that changed, a sale that ended, an author who left, a rating that no longer matches the visible reviews. Google compares the JSON-LD to the rendered page, and a mismatch can cost you the rich result or, in repeated cases, draw a manual action. Treat schema like any other part of the page that has to stay current.

The practical habit is to validate twice — once when you first add the block, and again whenever the underlying content changes. Google's Rich Results Test tells you whether the page is eligible for a specific feature, while the Schema.org validator checks the markup against the full vocabulary. Use both. After a site redesign, re-run the test on a few key templates, because moved or renamed fields are an easy way to silently break every page at once.

Tips and related tools

Add structured data to the templates that build your pages rather than editing posts one at a time, so every new item ships with valid JSON-LD automatically. Keep the markup in sync — if a price or date changes, update the schema too. And remember schema is an eligibility signal, not a ranking lever: it can earn rich results, but it does not by itself push you up the page.

This tool lives in our tag tools hub. Round out your on-page SEO with the Meta Tag Generator and Meta Tag Analyzer for titles and descriptions, the Related Keyword Finder to pick topics worth marking up, and the MozRank Checker to track authority over time.

Frequently asked questions

What is JSON-LD schema markup? It is structured data written in JavaScript Object Notation and placed in a script block. It describes your page to search engines using the schema.org vocabulary without changing your visible HTML.

Is this schema markup generator free? Yes. It is a free json-ld schema markup generator with no signup. Build and copy as many structured-data blocks as you need.

Where does the code go? Paste the <script type="application/ld+json"> block into your page, ideally inside the <head>, though the <body> works too.

Will schema markup improve rankings? Not directly. It makes pages eligible for rich results, which can raise click-through rates, but it is not a ranking factor on its own.

Do I need to validate the output? Yes. Run it through Google's Rich Results Test and the Schema.org validator to confirm it is error-free before publishing.

Why does Google prefer JSON-LD? It keeps structured data in one separate block instead of weaving it through HTML tags, which makes it much easier to add and maintain.

Can I mark up several types on one page? Yes. A page can carry multiple blocks — for example BreadcrumbList plus Article — as long as each accurately reflects the content.

Does my data get uploaded? No. The generator builds the JSON-LD in your browser, so nothing you enter is sent to a server.