Format, validate, minify and convert JSON right inside your editor — no copy-pasting into a website, nothing sent to any server.

Private & offline: every operation runs locally in the extension host. Your JSON never leaves your machine.

Features

All commands work on the current selection if you have one, otherwise on the whole file.

Command	What it does
Format JSON	Pretty-print with 2-space indent (in place). `Ctrl/Cmd+Shift+J`
Minify JSON	Strip whitespace to a single line (in place).
Validate JSON	Parse and report valid / the exact error line.
Convert JSON to TypeScript	Generate `interface` definitions in a new editor tab.
Convert JSON to YAML	Open the YAML equivalent in a new tab.
Convert JSON to CSV	Flatten a JSON array to CSV in a new tab.
Convert CSV to JSON	Parse CSV into a JSON array in a new tab.
Open in Jsonic.io (more tools)	Optional — open the current JSON in the full jsonic.io web suite (JSONPath, schema generator, diff, 20+ converters). Data travels in the URL hash only.

Usage

Right-click inside any .json / .jsonc file → pick a Jsonic command.
Command Palette (Ctrl/Cmd+Shift+P) → search Jsonic.
Keyboard: Ctrl+Shift+J / Cmd+Shift+J to format instantly.

Why Jsonic

The in-editor commands cover the everyday JSON chores. When you need the heavier tooling — JSONPath playground, JSON Schema generator, visual diff, conversion to Zod / Swift / Kotlin / PHP / Ruby and more — Open in Jsonic.io hands off to the full web suite, with your data encoded in the URL fragment (client-side, never uploaded).