The Best Schema Markup Generators in 2026

Merkle's tool on TechnicalSEO.com is the reliable default: a free, no-signup, form-based JSON-LD generator covering the dozen or so schema types most sites need — Article, Product, LocalBusiness, Organization, Event, Person, Recipe, Video, and more — with a live preview as you fill fields. It has been the SEO industry's go-to for years for a reason: it is fast, correct, and asks nothing of you.

The one gap is validation: it does not check your output against Google's Rich Results Test inline, so you copy the JSON-LD out and validate as a separate step. For one-off pages and beginners, that is a minor friction against an otherwise excellent free tool.

Price

Free, no signup

Output

JSON-LD

Types

~10–13 common

Best for

One-off / beginners

• Form-based, no coding required
• Real-time JSON-LD preview
• Covers the common rewarded schema types
• Part of a broader free SEO tool suite

RankRanger (now part of Similarweb) offers a free, no-signup JSON-LD generator that does one thing better than most free tools: it automatically includes the properties Google requires for each schema type, and hands you off to Google's Rich Results Test to validate in a click. Across roughly twelve types — FAQ, HowTo, Article, Product, Event, Local Business, Person, Video, Website, Recipe, Job Posting, Organization — that reduces the "valid but incomplete" markup beginners often ship.

It is a one-page-at-a-time tool with no bulk generation or CMS deployment, so it is a companion to a workflow rather than a platform. But for correct, validation-aware markup at no cost, it edges ahead of the plainer free generators.

Price

Free, no signup

Output

JSON-LD

Types

~12

Best for

Correct one-off markup

• Auto-includes Google-required properties per type
• Built-in hand-off to Google's Rich Results Test
• Covers the types Google rewards
• Beginner-friendly, no account

For WordPress sites, Rank Math has the most capable built-in schema tooling: a free tier covering 20+ types, a genuine visual custom-schema builder for any type schema.org supports, and — on paid plans — reusable Schema Templates that auto-apply markup by content condition. It validates via a one-click link to Google's test and handles WooCommerce product schema well.

Pricing is where you must read carefully: the headline PRO price of $5.99/month (about $71.88/year, unlimited personal sites) is promotional, and renewal is higher. Business ($19.99/mo) and Agency ($44.99/mo) add the template automation and client-site allowances. The plugin is feature-dense, but the free schema builder alone beats most standalone generators for WordPress users.

Price

Free tier; PRO ~$71.88/yr*

Platform

WordPress

Types

20+ plus custom builder

Note

*Promo pricing; renewal higher

• Free tier with 20+ schema types
• Visual custom-schema builder for any type
• Reusable Schema Templates (paid) auto-applied by condition
• WooCommerce support and one-click Google validation

When you need structured data that other generators choke on — deeply nested entities, linked @id references, the full schema.org type-and-property tree — Classy Schema is the free tool that handles it, in both JSON-LD and microdata. Its companion viewer renders your markup as an interactive entity-relationship graph, which doubles as one of the best ways to actually learn how schema entities connect.

That power comes with a learning curve and a dense UI — it is overkill for a simple Article block, and its built-in viewer is not a substitute for validating in Google's official test. (We could not confirm whether it requires a signup; it is free and active as of mid-2026.)

Price

Free

Output

JSON-LD + Microdata

Types

Full schema.org tree

Best for

Complex / entity work

• Full schema.org type and property coverage
• Nested and linked (@id) entities
• Interactive entity-relationship graph viewer
• Both JSON-LD and microdata output

One honest categorization: Screaming Frog does not generate schema, it validates it at scale — and that is exactly why it belongs here. The desktop crawler checks JSON-LD, microdata, and RDFa across an entire site against schema.org and Google's 25+ rich-result features, flagging errors versus warnings page by page. Once you have generated markup with the tools above, this is how you confirm it is correct everywhere, not just on the one page you tested.

The free tier crawls 500 URLs but excludes structured-data validation; the paid license (about €245/year, also shown as £199 / $279) unlocks it plus custom extraction and integrations. For any site with more than a handful of pages, it is the essential companion to a generator.

Price

~€245/yr (validation)

Role

Validator, not generator

Formats

JSON-LD, Microdata, RDFa

Best for

Site-wide auditing

• Site-wide bulk structured-data validation
• Checks Google's 25+ rich-result features
• Error vs warning flags per page
• Custom extraction (XPath/CSS/regex) and integrations

Yoast takes the opposite approach to Rank Math's builder: instead of you constructing schema, it automatically generates a connected, well-formed schema graph across your whole WordPress site — Organization, Website, WebPage, Article, BreadcrumbList, Person — with essentially no configuration. For owners who want correct structured data without thinking about it, the free version delivers a clean graph out of the box.

Premium ($118.80/year ex-VAT, single site) adds Local, Video, and News schema and more granular control. The trade-off versus Rank Math is flexibility: Yoast gives you a great automatic baseline but less hands-on control, and advanced types sit behind add-ons. Note its free FAQ and HowTo blocks now carry the deprecation caveat that applies to everyone.

Price

Free; Premium $118.80/yr

Platform

WordPress

Approach

Automatic graph

Best for

Set-and-forget WP

• Automatic connected schema graph, no setup
• Free FAQ/HowTo blocks (markup valid; rich results deprecated)
• Local, Video, News schema via Premium
• Validates in Google's test

OTTO is the pick when you want AI to handle schema end to end: it auto-detects the appropriate schema type per page across 30+ JSON-LD types and injects the markup live via a JavaScript pixel or plugin — no manual copy-paste. For agencies deploying structured data across many pages or clients, that execution layer is the real value.

It is paid and it is a suite: Starter is $99/month (one project), scaling through Growth $199, Pro $399, and Agency $999, with a 7-day trial. Schema is one feature of a broad AI-SEO platform, and the live-injection approach means your markup depends on OTTO's script running — worth weighing against static, self-hosted markup.

Price

From $99/mo (1 project)

Trial

7 days

Types

30+ JSON-LD

Best for

Agency auto-deploy

• AI auto-detects the right schema per page
• Live JS injection — no manual paste
• 30+ JSON-LD types
• Bundled in a full AI-SEO suite

Schema App is not a generator you dip into — it is an enterprise program for structured data as a managed data layer. It builds and maintains connected entity knowledge graphs, deploys dynamic markup across templated pages, offers an Entity Hub and performance analytics, and even exposes an MCP server so AI chatbots can query your structured data. For large organizations where structured data is strategic infrastructure, that depth is unmatched here.

Pricing is opaque by design: custom quotes only, with a reported 12-month minimum, a one-time setup fee, and a minimum monthly support commitment (we do not publish a starting number because Schema App does not). This is an enterprise procurement, not a tool you sign up for on a Tuesday.

Price

Custom (enterprise)

Model

Managed platform

Standout

Knowledge graph + MCP

Best for

Enterprise at scale

• Connected entity knowledge-graph management
• Dynamic markup across templated pages
• Entity Hub and performance analytics
• MCP server for AI chatbot access to your data

InLinks is a niche standout: using NLP entity extraction, it automatically generates and injects entity-based WebPage schema (with sameAs links to sources like Wikipedia) plus FAQ schema, and re-analyzes to keep the markup current as you edit content. For entity-SEO practitioners on content sites, that automated "about and mentions" layer is genuinely useful and hard to reproduce by hand.

The catch is scope: it currently outputs only two schema types (entity WebPage and FAQ), so it is a complement to a broader generator, not a replacement. It has a free tier, with paid plans from $49/month (Freelancer) up to Agency and Enterprise. As with everyone, the FAQ portion sits under the 2026 rich-result deprecation.

Price

Free tier; from $49/mo

Approach

NLP auto-injection

Types

2 (entity + FAQ)

Best for

Entity SEO on content sites

• NLP entity extraction into WebPage schema
• sameAs links to authoritative entity sources
• One-line JS auto-injection
• Re-analyzes and updates markup on content edits