100% local — safe to paste secrets
The JSON workstation that never leaves your browser.
Format, validate, diff, transform with real jq, convert any format, generate types, decode — the complete JSON toolkit, engineered for speed and keyboard-first flow. Blazing-fast, beautifully themeable, and 100% offline — no signup, no uploads, no telemetry, ever.
No install. No account. No catch. Pick any tool and go — free, forever.
Editor
The full workstation
scratch.json
{
"user": "ada",
"roles": ["admin", "dev"],
"active": true,
"stats": { "prs": 312 }
}TreeDiffTableSchemaQueryCodegenConvert
Private by design
Every operation runs on your device. Open DevTools → Network — it stays silent.
Network: silent
Themes
Click a swatch — recolors instantly, locally
New
jq playground
Real jq 1.8 · transform & reshape
Popular
Formatter
Beautify · validate · minify
Decoders
JWT · Base64 · URL · Hex