What is the difference between a JS object and JSON?

A JavaScript object literal is source code — it allows unquoted keys, single quotes, trailing commas, comments and expressions. JSON is a strict data format that requires double-quoted keys and strings, no trailing commas and no comments. This tool rewrites the former into the latter.

Does it handle JSON5 features like comments and trailing commas?

Yes. Line and block comments are stripped, and trailing commas, unquoted keys and single-quoted strings are all accepted, then normalised into strict JSON with double quotes.

Is it safe to paste my object here?

Your input is evaluated and converted entirely in your own browser tab and is never uploaded or stored. The object literal you paste is your own code running locally, just as it would in your own console.

Why do I get an error?

The converter reports the JavaScript parse error when the input is not a valid object expression — for example a missing bracket or an unterminated string. Fix the highlighted problem and the JSON regenerates automatically.

Can it minify or pretty-print?

Both. Choose a 2 or 4 space indent to pretty-print the JSON for readability, or select Minified to produce a single compact line ideal for embedding in code or a request body.

What is the JS Object to JSON Converter?

Free JS object to JSON converter. Paste a JavaScript or JSON5-style object with unquoted keys, single quotes, trailing commas or comments and get strict, valid JSON back. Choose the indent or minify. Runs in your browser, nothing uploaded. It runs free in your browser on Gera Tools, with nothing uploaded.

JS Object to JSON Converter

Name: JS Object to JSON Converter
Creator: Gera Tools
License: https://creativecommons.org/licenses/by/4.0/

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Convert a JavaScript object to valid JSON

Developers constantly copy an object out of a code file or a console log and need it as strict JSON — for a config file, an API request body, or a test fixture. The problem is that a JavaScript object literal is not JSON: it may use unquoted keys, single quotes, trailing commas, and even comments, none of which JSON allows.

This converter fixes all of that. Paste your object on the left and get clean, double-quoted, strictly valid JSON on the right, updating live as you type.

What it accepts

Unquoted keys — { name: 'Ada' } becomes { "name": "Ada" }.
Single quotes — normalised to double quotes.
Trailing commas — silently removed.
Line and block comments — stripped before conversion.

Choose a 2 or 4 space indent for readable output, or Minified for a single compact line, then press Copy JSON.

Private by design

The conversion runs entirely in your browser: your object literal is evaluated locally, exactly as it would be in your own developer console, and the result never leaves the tab. Nothing you paste is uploaded, logged or stored, so it is safe for objects that contain internal field names or sample data. If the input is not a valid object expression, the tool shows the precise parse error so you can fix it.