JSON Flatten
Convert nested objects and arrays into a flat object keyed by readable paths. It helps inspect deep API payloads, prepare spreadsheet exports, and compare specific fields without expanding every level.
JSON Flatten
Flatten nested JSON into path-value pairs for logs, spreadsheets, and rule checks.
Nested JSON0 lines
Output0 lines
1Ready. Load an example or paste JSON to begin.Ready. Load an example or paste JSON to begin.
Parse summary
- Root
- -
- Keys
- -
- Depth
- -
- Size
- -
Type counts
strings -numbers -booleans -nulls -objects -arrays -
Structure preview
No valid JSON preview.
Data handling notes
- Nested object keys are joined with dots.
- Array positions are represented with bracket indexes such as items[0].
- Empty objects and arrays are preserved instead of disappearing from the output.
Before you rely on the result
This tool is intended for fast inspection and routine preparation. It can save time, but it does not replace review when the result affects production systems, security settings, business data, or legal obligations.
- Check representative inputs instead of assuming one example covers every edge case.
- Do not paste secrets, private customer data, or credentials unless you have confirmed the page processes that data locally and the use is allowed by your organization.
- Copy the output into your own workflow only after checking formatting, timezone, encoding, or syntax assumptions.
- Data conversion tools preserve structure where possible, but they cannot infer business rules such as optional fields, database dialects, XML namespaces, or CSV column meaning.
FAQ
Does it upload my JSON?No. Flattening runs in the browser only.
Can it unflatten JSON?Not in this version. This page focuses on flattening for inspection and mapping.