JSON Flattener

Summary

JSON Flattener converts deeply nested JSON objects into a single, flat object where each key represents the full path to its original value using dot notation. This makes it easy to work with complex API responses, configuration files, or log data in spreadsheets, databases, or analytics pipelines. Arrays are preserved with bracket-index notation (e.g. items[0].name) or can be configured with a custom separator.

How it works

1. Paste or type your nested JSON into the input panel.
2. Choose an optional separator (default is a dot).
3. Click Flatten to produce the single-level output.
4. Review the flat key-value pairs in the output panel.
5. Click Copy Output to copy the result to your clipboard.

Use cases

• Prepare API response data for import into a spreadsheet.
• Debug deeply nested configuration objects.
• Map JSON fields to flat database column names.
• Simplify log payloads for search indexing.
• Compare two flat objects for key differences.
• Generate dot-path references for template engines.

Frequently Asked Questions