JS Object to JSON Converter
Convert a JavaScript object literal into strict, valid JSON.
From loose JS to strict JSON
A JavaScript object and JSON look similar but are not the same: JS allows unquoted keys, single quotes, trailing commas and comments, none of which strict JSON permits. This converts a JavaScript object literal into valid JSON — quoting the keys, normalising the strings, dropping what JSON forbids — so you can turn a snippet of code into data a JSON parser will accept.
Paste your JavaScript object and it comes back as valid JSON.
Why the difference bites
This conversion solves a frequent frustration: you copy an object out of some JavaScript, try to use it as JSON, and a parser rejects it because of an unquoted key or a trailing comma. The rules that make JavaScript comfortable to write are exactly the ones JSON disallows for the sake of being a strict, unambiguous data format. Converting handles those differences so you do not have to hand-fix every quote and comma, which is tedious and easy to get wrong on a large object.
Frequently asked questions
Why won't my JavaScript object parse as JSON?
JSON is stricter — it requires quoted keys and double quotes, and forbids trailing commas and comments, which JavaScript allows.
What does the conversion fix?
It quotes keys, normalises strings to double quotes, and removes trailing commas and comments so the result is valid JSON.
Is my code uploaded?
No. The conversion happens in your browser.