Free and open first
Best Schema Markup Tools in 2026
Schema markup tools support work with structured data, from generating markup to checking it and keeping track of it. Compare supported schema types and schema validation with rich-result preview and bulk generation. API access and WordPress support can help you assess how a tool may fit into your workflow, while markup monitoring is another criterion to weigh. Free-plan availability and paid starting prices add cost context. Baseline Labs Schema Generator, JSON Schema App SaaS Schema, and JSON-LD Generator are among the products shown, along with Rolling Schema. Focus on the schema formats and management tasks you need when comparing the listed capabilities.
- 24 apps
- Research read 23 Sept 2026
- How the order is worked out
- 1
Baseline Labs Schema Generator
Free plan APISelf-hostedWebBaseline Labs Schema Generator covers many schema types and offers a separate scheduled regeneration feature.
- 2
BlueGrid Schema Validator
Free plan WebChoose BlueGrid Schema Validator for free, browser-based JSON-LD generation and validation across its supported types.
- 3
EasySchema
Free plan WebEasySchema combines schema generation with a broad set of SEO and utility tools under a free plan.
- 4
Google Rich Results Test
Free plan WebChoose Google Rich Results Test for a free, anonymous check of structured data and possible rich result eligibility.
- 5
JSON-LD Generator
Free plan WebJSON-LD Generator offers a focused way to create and validate markup for its supported schema types. It does not include a rich-result preview, bulk generation, or API access.
- 6
Rolling Schema
Free plan APIWebRolling Schema combines recurring content checks with server-side JSON-LD delivery and multiple deployment routes. Compare page and domain limits, and note that API access starts with Power.
- 7
Schema.dev
Free plan APIExtensionWebSchema.dev combines structured-data creation with validation, offering both a guided builder and UI or API testing.
- 8
JSON Schema App SaaS Schema
Free plan WebJSON Schema App SaaS Schema automates structured data work for SaaS websites and lists support for a broad range of platforms.
- 9
- 10
Schema.biz
Free plan WebSchema.biz brings structured-data, database, and API utilities together in a free web toolkit. Check its URL-fetching behavior and lack of persistent cross-device work against your workflow.
- 11
isSemantic.net
Free plan WebisSemantic.net brings several structured-data tasks together in one web tool, including validation, markup generation and RDF conversion.
- 12
Schema Markup Generator
Free plan WebSchema Markup Generator provides a no-signup way to create and copy JSON-LD for a page. Users should note the stated limitation for Service markup and ensure markup reflects visible content.
- 13
Schema & Structured Data for WP & AMP
Free plan Self-hostedWebThe plugin offers a broad selection of schema types, conditional display controls, and listed compatibility with common WordPress tools.
- 14
SchemaValid
Free plan WebSchemaValid offers a broad set of free browser tools for structured data and technical SEO without requiring an account. Note the per-minute URL check limit and that tool availability may change.
- 15
SEO Schema Markup
Free plan WebSEO Schema Markup combines schema generation with validation in a browser-based toolkit.
- 16
StructuredValidator
Free plan WebStructuredValidator offers immediate JSON-LD checks, URL validation, and side-by-side comparison in a free web tool.
- 17
TechnicalSEO Schema Markup Generator
Free plan WebThe generator provides a straightforward way to produce Schema.org JSON-LD and links to tools for checking it. Adding the output to an HTML page remains a separate task.
- 18
VitalSentinel Schema Validator
Free plan APIWebVitalSentinel Schema Validator provides detailed JSON-LD checks, including syntax locations and property guidance for eight schema types.
- 19
Schema Markup Info
Free plan WebSchema Markup Info combines JSON-LD generation with page-level validation and sitemap-based audits. Its findings have defined crawl limits, and it does not predict Google’s rich-result display.
- 20
WooCommerce Rich Snippets & Schema Markup
Free plan WebChoose WooCommerce Rich Snippets & Schema Markup if you need a free WooCommerce plugin for product, business, book, recipe, or other structured data.
- 21
Schema App
Paid ExtensionWebSchema App combines schema creation, bulk deployment and monitoring with customer success support.
- 22
Schema Pro
Paid Self-hostedWebSchema Pro offers reusable schema settings, field mapping, and custom schema creation for WordPress sites. The license remains usable after expiry, but ongoing updates and support require renewal.
- 23
JSON-LD Playground
Paid WebJSON-LD Playground offers a browser-based space to explore JSON-LD through examples, processing modes, and output views. Note the stated limits on signature demos and some remote contexts.
- 24
uSchema
Paid Self-hostedWebuSchema focuses on automating structured data inside WordPress, with broad schema coverage and WooCommerce support. Its lifetime, site-based licenses suit buyers who prefer a one-time purchase.
#1Places #1, #2, #3, #4, #5 on this list can be bought by the makers of the software on it. See the price