- Paste nested JSON.
- Choose delimiter and array options.
- Click Flatten JSON.
JSON Flattener
Flatten nested JSON objects into a single-level structure.
How to Use This Tool
Learn More About JSON Flattener
Why flatten JSON?
Flattened JSON makes it easy to export to CSV, index in databases, or compare payloads in logs.
About JSON Flattener
Flattening converts nested JSON into simple key/value pairs, which is useful for spreadsheets, logs, and analytics pipelines. This tool makes it fast and configurable.
Flatten JSON with custom delimiters and array options.
- Runs in browser
- Yes
- Delimiter
- Configurable
- Array support
- Optional
Examples
Flatten a nested object
Convert a deep structure to flat keys.
Input
{"user":{"name":"Ava"}}Output
{
"user.name": "Ava"
}Features
Custom delimiters
Use dot, slash, or any delimiter you prefer.
Array handling
Flatten arrays into indexed keys when enabled.
Export ready
Generate flat JSON for CSV or spreadsheets.
Use Cases
- Prepare JSON for CSV exports.
- Simplify logging and analytics payloads.
- Flatten configuration files for diffing.
Frequently Asked Questions
Related Tools
Use the unflattener to restore nested structures later.