Flattened result...
How Flattening Works
Before:
{"user": "nested object"}
After:
{"user.key": "value"}
Related Tutorials
What is JSON Flatten?
JSON flattening converts nested objects into a single-level structure. Nested keys become path-like strings using a separator. This simplifies data for spreadsheets, databases, or systems that do not handle nested structures.
How to Use
- Paste your nested JSON object.
- Select a separator (dot, underscore, or slash).
- Click Flatten to convert.
- Copy the flattened result.
Why Use This Tool?
Convert complex nested JSON to simple key-value pairs
Easy export to CSV or spreadsheet formats
Choose custom separator for your use case
Client-side processing, instant results
Tips & Best Practices
- Arrays are preserved as-is
- Null values are kept in the output
- Dot separator is standard for most systems
- Underscore works well for database columns
Frequently Asked Questions
When should I flatten JSON?
When exporting to CSV, storing in flat databases, or working with systems that do not support nested structures.
What about arrays?
Arrays are preserved. This tool flattens objects only.
Can I reverse flattening?
Yes, but you need to parse keys back into nested structure. This tool only flattens.
Which separator should I use?
Dot for APIs, underscore for databases, slash for URL-like paths.