JSON Stringify / Unstringify Online
Convert JavaScript objects to JSON strings (stringify) or parse stringified JSON back to readable format (unstringify). Everything runs in your browser — your data stays private.
Result will appear here...
About JSON Stringify & Unstringify
JSON.stringify() converts a JavaScript value (object, array, string, number, boolean, or null) into a JSON-formatted string. This is essential when you need to send data over a network, store it in localStorage, embed it in HTML attributes, or pass it as a URL parameter.
JSON.parse() (unstringify) does the reverse — it takes a JSON string and reconstructs the original JavaScript value. This is commonly used when receiving data from an API response, reading from storage, or processing configuration files.
Features
- Stringify JavaScript objects, arrays, and values to JSON strings
- Unstringify (parse) JSON strings back to readable, formatted output
- Configurable indentation: none, 2 spaces, 4 spaces, or tabs
- Sort object keys alphabetically for consistent output
- Filter output by value type (strings, numbers, booleans, objects, arrays)
- Before/after size comparison to see how stringification affects data size
- Drag & drop or upload JSON files directly
- 100% client-side — your data never leaves your browser