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.
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).
