schemo
JSON-LD validator (Schema.org)
100% in your browser — nothing is sent. schemo checks the fields Google (rich results) requires and recommends for common Schema.org types.
Paste a JSON-LD snippet on the left to validate it live.
schemo is a free, no-sign-up online web tool: json-ld validator (schema.org). Everything is computed right in your browser — no data is sent to a server, your information stays private. Fast, ad-free, works on mobile and desktop. Keywords: json-ld, jsonld, schema.org, données structurées, structured data, seo.
FAQ
Is schemo free?
Yes. schemo is completely free with no sign-up — json-ld validator (schema.org). No hidden costs, no credit card.
Is my data sent to a server?
No. schemo runs 100% in your browser — everything is computed locally, nothing is transmitted or stored. Your data stays private.
Do I need to register or install anything?
No. Open schemo and start right away — no account, no install. Works on mobile and desktop.