JSON Deserialize Online
Paste a JSON string and instantly deserialize it into a formatted, human-readable JSON object. Works with plain JSON and double-escaped JSON strings.
Last updated: May 28, 2026
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Buy me a coffeeWhat is JSON Deserialize Online?
JSON deserialization is the process of converting a JSON-formatted string back into a structured data object. In most programming languages, this is done with a built-in parser: JSON.parse() in JavaScript, json.loads() in Python, or JsonSerializer.Deserialize() in C#.
This tool lets you do that deserialization directly in your browser. Paste any valid JSON string — including double-escaped strings where the JSON has been encoded as a string value — and it will parse and format it for you. It also shows the root data type (Object, Array, string, number, etc.) and the structure summary.
How to Use JSON Deserialize Online
Paste your JSON string into the input area
The tool instantly deserializes and formats the output
Check the type badge to confirm the parsed data type
Copy or download the deserialized JSON output
Use "Load Sample" to see an example
Common Use Cases
- Developers inspecting serialized JSON payloads from APIs or message queues.
- Backend engineers debugging JSON that was serialized twice (a string containing escaped JSON).
- QA engineers validating that serialization and deserialization round-trips correctly.
- Data engineers converting serialized JSON logs into readable objects for analysis.
- Frontend developers parsing stringified JSON values stored in localStorage or cookies.
Example Input and Output
A JSON string (with escaped quotes) is deserialized into a structured object.
{"name":"Alice","age":30,"roles":["admin","user"],"active":true}{
"name": "Alice",
"age": 30,
"roles": [
"admin",
"user"
],
"active": true
}Privacy
All parsing runs in your browser. No data is uploaded to any server.