Inspect JSON as an interactive Tree, view the Raw text, or run JSONPath
queries — right inside VS Code. Big integers and high-precision decimals are kept
lossless, and everything runs locally (no network, no telemetry).
Features
Tree view — collapsible objects/arrays, type-colored keys/strings/numbers/
booleans/null, item counts, Expand all / Collapse all, lazy rendering for large
files, and per-node actions (copy value / key / object / JSONPath / JSON Pointer,
expand / collapse subtree).
Raw view — Beautify, Minify, word-wrap toggle, and Copy. Re-serialization is
lossless (numbers and key order preserved).
Query view — JSONPath with a live match count, results list, copy value/path,
and a local history of the last 10 queries. The engine is dependency-free and
safe (no eval/Function).
Find — Ctrl/Cmd+F searches keys and values, with Next/Previous, match
highlighting and auto-expansion of the matched node.
Lossless numbers — powered by lossless-json; the native JSON.parse is
never used for your data.
Tolerant parsing — non-breaking spaces and other Unicode whitespace used for
indentation (a common copy/paste artifact) are normalized before parsing, while
string contents are preserved exactly.
How to use
Custom editor: right-click a .json file → Reopen Editor With… → JSON
Inspector (it's registered with option priority, so it never hijacks your
default JSON editor).
Command:JSON Inspector: Open Current File (Command Palette or the editor
title bar on JSON files).
Selection: select JSON in any file → right-click → JSON Inspector: Open
Selection.
The custom editor is a viewer and re-renders when the document changes; edit the
raw file with Reopen Editor With… → Text Editor.
Privacy & security
No network requests, no telemetry, no eval. JSON is processed locally; clipboard
writes go through VS Code's clipboard API. The webview runs under a strict Content
Security Policy with a per-load nonce.
Build from source
npm install
npm run build # type-check + bundle host (out/) and webview (media/)
npm test # unit tests for the core (parser, paths, search, JSONPath)
npm run package # produce a .vsix (requires @vscode/vsce)
