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.