ConversionAccepts JS object literal syntax (unquoted keys, single quotes, template strings, hex numbers, trailing commas, comments). Functions, arrow functions, new-expressions and undefined cannot exist in JSON — they are dropped and counted by kind.

JS object literalJS

Load a JS object

JSON outputJSON

Load a JS object and the JSON will appear here

Paste it straight from your code

JS Object to JSON

JS object literal → standard JSON · functions and undefined reported · runs locally

🔒Processed locally in your browser — never uploaded or stored

No upload, no storage

JSON is processed in memory and never sent to a server.

Share via URL fragment

Share links encode data in the # anchor — never sent to a server.

Remember last edit

Optionally keep your last input locally; clear it with one click.

Why use JS object to JSON

Code syntax accepted as-is

Unquoted keys, single quotes, trailing commas, comments, hex numbers — objects copied out of source code convert without hand-editing.

Double quotes added for you

Keys and strings are normalized to strict JSON double quotes that any parser will read.

Non-JSON values accounted for

Functions, arrows, new Date and undefined are dropped — each kind counted and reported, never silently swallowed.

Errors with line and column

Genuinely unconvertible syntax like template interpolation or computed keys gets a position and a plain reason.

Local · no upload

Code snippets are processed entirely in your browser; nothing is uploaded or stored.