Best Schema Markup Tools in 2026
Updated
In short: Baseline Labs Schema Generator is ranked #1 of 24 as of 4 October 2026, ahead of JSON Schema App SaaS Schema and JSON-LD Generator. The best-ranked option with a free plan is JSON Schema App SaaS Schema. The lowest first paid tier on this page is Schema & Structured Data for WP & AMP at $8.25/mo.
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 schema markup tools ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
6 of the 24 here have a free tier you can use, 0 have open-source code on record, and 0 have full bars: free, open, on most of your devices and documented.
| # | App | Signal | Free tier | Open code | Devices | From | Score |
|---|---|---|---|---|---|---|---|
| 1 | Baseline Labs Schema GeneratorWeb · API | Two bars | — | 1 of 6 | €79/mo | 6.4 | |
| 2 | JSON Schema App SaaS SchemaWeb | Two bars | — | 1 of 6 | $14/mo | 6.4 | |
| 3 | JSON-LD GeneratorWeb | Two bars | — | 1 of 6 | Free | 6.4 | |
| 4 | Rolling SchemaWeb · API | Two bars | — | 1 of 6 | €79/mo | 6.4 | |
| 5 | SchemaValidWeb | Two bars | — | 1 of 6 | Free | 6.4 | |
| 6 | StructuredValidatorWeb | Two bars | — | 1 of 6 | Free | 6.4 | |
| 7 | Schema Markup InfoWeb | One bar | — | — | 1 of 6 | — | 5.5 |
| 8 | isSemantic.netWeb | One bar | — | — | 1 of 6 | — | 5.4 |
| 9 | Schema & Structured Data for WP & AMPWeb · Self-hosted | One bar | — | — | 1 of 6 | $8.25/mo | 5.4 |
| 10 | SchemaNo platforms listed | One bar | — | — | 0 of 6 | — | 5.2 |
| 11 | Schema.bizWeb | One bar | — | — | 1 of 6 | — | 5.2 |
| 12 | Schema.devWeb | No signal | — | — | 1 of 6 | — | 5.2 |
| 13 | VitalSentinel Schema ValidatorWeb | No signal | — | — | 1 of 6 | — | 5.2 |
| 14 | BlueGrid Schema ValidatorWeb | No signal | — | — | 1 of 6 | — | 5.1 |
| 15 | EasySchemaWeb | No signal | — | — | 1 of 6 | — | 5.1 |
| 16 | Schema Markup GeneratorWeb | No signal | — | — | 1 of 6 | — | 5.1 |
| 17 | SEO Schema MarkupWeb | No signal | — | — | 1 of 6 | — | 5.1 |
| 18 | WooCommerce Rich Snippets & Schema MarkupNo platforms listed | No signal | — | — | 0 of 6 | — | 5.1 |
| 19 | Google Rich Results TestWeb | No signal | — | — | 1 of 6 | — | 5.0 |
| 20 | Schema AppWeb · Extension | One bar | — | — | 1 of 6 | — | 5.0 |
| 21 | TechnicalSEO Schema Markup GeneratorWeb | No signal | — | — | 1 of 6 | — | 5.0 |
| 22 | JSON-LD PlaygroundWeb | No signal | — | — | 1 of 6 | — | 4.9 |
| 23 | uSchemaWeb | No signal | — | — | 1 of 6 | — | 4.7 |
| 24 | Schema ProWeb | No signal | — | — | 1 of 6 | — | 4.6 |
Is your app on this list?
Numbered spots on this list can be sponsored. They are labelled, and the editorial order and scores never change for payment.
Questions about this list
Which schema markup tool is ranked first on Freedom251?
Baseline Labs Schema Generator is ranked #1 of 24 with a score of 6.4. JSON Schema App SaaS Schema is second and JSON-LD Generator third.
How many of these have a free plan?
6 of the 24 on this page publish a free plan on their own pricing pages.
Which is the cheapest paid option?
On this page, Schema & Structured Data for WP & AMP has the lowest first paid tier we found: $8.25/mo.
How is this list ranked?
Ranked free-and-open first: a usable free tier and open-source code, then the platforms it runs on and its documentation. Paid placements never change a rank.