Schemantra review (2026): is it any good?
Free web-based JSON-LD generator for every schema.org type
Schemantra report card
Good · out of 4.0 · graded Oct 23, 2026
Best for free JSON-LD for any schema.org type
Schemantra is a free web app for writing schema.org markup of any type, with linked sub-schemas and a diagram of how a page's entities connect. It's still labeled a beta, the footer reads 2022 and the newest posts are from March 2024, it doesn't test or deploy anything, and you add the JSON-LD by hand. If you want markup checked or kept up for you, look elsewhere.
Who Schemantra is for
- Fits if you need a schema.org type that Google's rich result tools don't cover
- Works for mapping how the entities on a page relate before you write the markup
Who Schemantra is not for
- Watch out: it's still labeled a beta, the footer copyright reads 2022 and the newest blog posts are from March 2024
- Not for you if you want markup tested, as it only writes it
- Too light for sites that need markup added and monitored, as you paste it in yourself and nothing is checked later
- Skip it if you don't want an account, which is needed to create and save schemas
Why Schemantra gets a 2.6
Five grades, each with its reason. The GPA is their average: an A is 4 points, an F is none.
- AValue for moneyFree: an account builds, saves and draws markup for any schema.org type, and the site shows no paid plan. Custom ontology work is a separate service with no prices shown.
- AFree plan and trialFree outright, with no limits stated. You need an account to create and save schemas.
- DFeaturesOne narrow job: writing JSON-LD across the full schema.org vocabulary, 1,353 types and 1,448 properties, with sub-schemas and a graph view. It doesn't test markup, add it to pages or watch it afterward.
- CEase of useNo rating on record. You sign in and build each schema field by field, and nesting sub-schemas means knowing how schema.org types relate. There's a free course and step-by-step guides.
- CPlatforms and integrationsWeb only, with no integrations or API on record. Markup leaves the app by copy and paste, or through a tag manager you set up.
What these grades rest on. Graded from this listing, whose facts were read from Schemantra's own pages on 23 October 2026. Not based on using the product, and shorter than our full reviews. How we review and grade.
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<a href="https://toolgpa.com/tools/schemantra#review"><img src="https://toolgpa.com/badge/schemantra.svg" alt="Schemantra: 2.6 GPA on ToolGPA" width="196" height="56"></a>Where Schemantra stands among technical SEO tools
Schemantra's GPA of 2.6 is higher than 56 of the 83 other technical SEO tools we grade, and level with 7.
It stands best on free plan and trial (A, above 62 of 83) and worst on features (D, above 0).
Schemantra has no paid plan.
On features, ease of use and platforms it scores 1.7 out of 4. Nothing scores higher for less, though at least one tool matches that score at a lower price.
Each grade against the category
Every bar is all 84 technical SEO tools we grade, cut by the letter each got. Schemantra’s own letter is outlined.
- AValue for moneyAbove 54 of 83, level with 29
- AFree plan and trialAbove 62 of 83, level with 21
- DFeaturesAbove 0 of 83, level with 9
- CEase of useAbove 7 of 83, level with 54
- CPlatforms and integrationsAbove 3 of 83, level with 23
Price against what you get
Each dot is one of 73 technical SEO tools. Further left costs less, and higher up scores better on features, ease of use and platforms. Point at a dot to see which tool it is.
Features, ease of use and platforms, averaged
What paid plans start at, a month (each step along is roughly double) →
- The best score at each price
- Has a free plan
- No free plan
Keep Schemantra, or make your own?
Keep it
Schemantra is free, so making your own would save you nothing.
And it is not the kind of software a weekend replaces. It is one of the better ones too: its GPA of 2.6 is higher than 56 of the 83 other technical SEO tools we grade.
What you could make
- Schema markup: an app builder makes this well.
What you could not
- A builder that other people can use without writing code.
What this rests on. Schemantra’s listing: what it does, where it runs, what it plugs into and what it costs. It is a judgement about the kind of software this is. We have not built a replacement for it, and making your own means looking after it too. How we decide, and every tool’s verdict.
What is Schemantra?
Schemantra is a free web app, marked as a beta, for writing schema.org markup in JSON-LD without code. It covers the whole schema.org vocabulary, about 1,350 types and 1,450 properties, and lets you nest related entities as sub-schemas to build a knowledge graph of a page, shown as a diagram. Markup is copied from the app and added to pages by hand or through a tag manager.
Worth knowing
- It is labeled as a beta; the footer copyright reads 2022 and the newest blog posts date from March 2024.
- It only writes markup: you add the JSON-LD to your pages yourself or through a tag manager, and nothing is monitored afterward.
- An account is needed to create and save schemas.
- Custom ontology building is offered as a service, with no prices shown.
Key features
- The full schema.org vocabulary
- Its guide lists 1,353 schema types and 1,448 properties, so less common types can be built as well as the ones Google uses for rich results.
- Sub-schemas and linked entities
- Properties that are themselves types, such as an organization's founder as a Person, are added as sub-schemas linked to the main entity.
- Knowledge graph view
- Shows the entities on a page and how they relate to the main one as a diagram while you build.
- Industry starting points
- Lists the usual types for local businesses, healthcare, real estate, ecommerce, car dealers, airlines, hotels and publishers.
- Free course and guides
- A schema markup crash course with a car dealership example, step-by-step guides, and a forum for questions.
Schemantra pricing
As of Oct 23, 2026, Schemantra is free to use.
- Starts at
- Free
- Free plan
- Free account to build, save and visualize JSON-LD markup for any schema.org type; the site shows no paid plan.
- Free trial
- None listed
| Plan | Price | What you get |
|---|---|---|
| Free | $0 | Sign in to create, link and save schema markup of any schema.org type, with no limits stated. |
Read from schemantra.com on Oct 23, 2026. Prices change, so confirm with Schemantra before you buy.
Schemantra alternatives
- Schemantra vs WordLift
From $879/mo
Common questions
Does Schemantra have an Android app?
No Android app was listed when its pages were read on Oct 23, 2026. Schemantra is listed for Web.
Does Schemantra have an iPhone app?
No iPhone app was listed when its pages were read on Oct 23, 2026. Schemantra is listed for Web.
Is Schemantra open source?
Schemantra is not described as open source on its own site, as read on Oct 23, 2026.
Sources for this page
The prices, plans, platforms and features above were read from these pages on Oct 23, 2026.