JS Object to JSON Converter
Free JS object to JSON converter — paste a JavaScript object literal (unquoted keys, single quotes, comments, trailing commas) and get valid JSON. Runs locally.
Runs entirely in your browser — nothing you enter is uploaded or stored.
JS Object to JSON Converter
Free JS object to JSON converter — paste a JavaScript object literal (unquoted keys, single quotes, comments, trailing commas) and get valid JSON. Runs locally.
Paste your JS object on the left and the JSON is produced instantly on the right — right in your browser. There’s no upload step: your data never leaves the page, which you can confirm from the Network panel or our privacy policy.
Credits
This tool is powered by open-source libraries that run in your browser:
- JSON5 — Lenient JSON/JS-object parsing (MIT)
Frequently asked questions
How do I convert JS object to JSON?
Paste or type your JS object in the left editor (or use Sample / Upload / URL). The JSON appears instantly on the right — copy or download it. Everything runs in your browser.
Is my data uploaded anywhere?
No. This converter runs entirely in your browser — your JS object is never sent to a server. You can verify it in the Network tab or in our Content-Security-Policy.
Is the JS Object to JSON free?
Yes — completely free, no sign-up and no limits. Everything happens client-side.