About
About jsonformattercheck.com
jsonformattercheck.com is a free, privacy-first suite of JSON tools built for developers, QA engineers, data analysts and API integrators who work with JSON every day and want a fast, no-nonsense alternative to ad-heavy online JSON formatters.
Our mission
We believe a JSON formatter shouldn't ship your data to a server, push trackers, or hide pretty-printing behind a paywall. Our mission is simple: provide the most accurate, fastest and most private JSON tooling on the web — and keep it free forever.
What we offer
- JSON Formatter & Beautifier — pretty-print and indent JSON.
- JSON Validator & Linter — JSON parsing follows RFC 8259 with optional JSON5 / JSONC leniency mode, plus line/column error reporting.
- JSON Diff — word-level structural compare of two JSON payloads.
- JSON Tree Viewer — collapsible interactive tree of any JSON document.
- JSONPath Tester — query JSON with JSONPath expressions.
- JWT Decoder — decode JSON Web Tokens (header + payload).
- JSON Schema Validator — validates against common Draft 7 keywords (
type,properties,required,items,enum,const,minimum/maximum,pattern,format, local$ref). See the Schema Validator tool for the supported keyword list.
Privacy first
Every tool runs 100% client-side. There are no servers parsing your payload, no third-party ads loaded on this site, and no behavioural analytics on your inputs. Your JSON, JWTs and schemas never leave your browser. We do use Google Analytics for aggregate page-view stats — never tool inputs. Read more on our Privacy Policy page.
Get in touch
Found a bug? Want a new tool added? Visit our Contact page — we read every message.