Your JSON never leaves your browser
A plain-language explanation of exactly what does and doesn't happen with your data on this site.
Your JSON data
Every tool on this site — the editor, validator, formatter, compare, schema generator, converters, tree viewer, query tester, fake data generator, and type generator — runs entirely as JavaScript in your browser. The JSON you paste, type, or import is parsed, transformed, and rendered locally on your device. It is never sent to, processed by, or stored on any server operated by this site.
Local storage
The Home editor's multi-tab workspace saves your open documents in your browser's localStorage so they survive a page refresh. This data stays on your device — it is not synced anywhere and is only ever readable by pages on this same domain. You can clear it at any time by clearing your browser's site data for this domain.
Third-party scripts
This site is built from plain static files with no backend. The core editor (CodeMirror) is self-hosted as part of this site's own files. A few pages load additional libraries from the cdnjs.cloudflare.com CDN to power specific features: Chart.js (charts on the Home page), js-yaml (YAML conversion), SheetJS/xlsx (Excel export), and Ajv (JSON Schema validation on the Validator page). Loading a script from a CDN means your browser makes a request to that CDN's servers, the same as it would for any site using a public CDN — cdnjs does not receive your JSON data through this site's use of it.
Analytics & cookies
This site does not currently use any analytics, tracking scripts, or cookies. If that changes in the future, this page will be updated to reflect it.
Accounts
There is no account system, login, or user database. No personal information is collected because none is requested.
Schema URLs
The one exception to "nothing is sent anywhere": if you explicitly paste a schema URL into the JSON Validator's schema-validation feature, your browser will fetch that URL directly to retrieve the schema. This only happens when you provide a URL yourself — it is not automatic.
Questions
This is a small, independently run toolkit. If anything on this page is unclear, treat the simplest explanation as the accurate one: your JSON stays on your device.