extension · developer
jsonyo.
local json validator + formatter + JMESPath queries.
paste json or click 'inspect this page' to grab the dom's json. validate with ajv, query with JMESPath, format on the fly. nothing leaves the tab.
v1.0.0 · published 2026 · manifest v3
jsonyo
v1.0.0 · developer
input
1.2 KB
schema
schema.org/Product
status
valid · 0 errors
query
products[?price<`100`].name
use jsonyo →
what it does
four things, in four lines.
jsonyo v1.0.0
AJV validation
json-schema (draft-07/2019/2020) right in the popup. errors shown with line + path.
JMESPath queries
compose queries with autocomplete. instant preview against pasted json.
inspect this page
extracts inline json from the current tab (script[type=application/ld+json] etc).
zero round-trips
pure browser. no server, no rate limit.
paperwork
required pages.
every extension here ships a full paddle-compliant suite. no hidden terms, no opt-out cookies, no email-grab on first install.