Online JSON Serializer

Serialize JavaScript objects to valid JSON strings. Convert JS notation to proper JSON with formatting options.

Indentation

Sort Keys Alphabetically

JavaScript Object / JSON Input

Object to JSON String

Convert JavaScript objects (including those with unquoted keys) into properly formatted JSON strings. Perfect for preparing data for APIs, storage, or debugging.

JS → JSON

How this Online JSON Serializer works

The Online JSON Serializer runs entirely in your browser using JavaScript. Unlike other tools that send your data to a server, we process everything locally on your device. This guarantees 100% privacy and blazing fast speed.

No server interaction – data never leaves your device
Instant results since there is no network latency
Works offline once the page is loaded
Free to use with no usage limits

How to use this Online JSON Serializer

Input Data

Paste JSON or JavaScript object notation.

Configure

Set indentation and key sorting options.

Serialize

Get properly serialized JSON string.

Example Usage

Serializing JS object to JSON:

Input

{name: "John", age: 30}

Output

{"name":"John","age":30}

Frequently Asked Questions

What is JSON serialization?

Serialization converts JavaScript objects into JSON strings that can be stored or transmitted.

Can I use JavaScript object syntax?

Yes! You can use unquoted keys and single quotes - the tool will convert to valid JSON.

What is key sorting?

Sorting keys alphabetically makes JSON output consistent and easier to compare between versions.

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The Online JSON Serializer is maintained by CodeItBro. We aim to provide the best free developer tools on the web. If you have feedback or suggestions, please visit our contact page.

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