How does this tool handle nested JSON objects?

The converter identifies all unique keys across the entire JSON array and flattens objects to ensure every data point is represented in the resulting CSV columns.

Is my data sent to a server?

No. All conversion happens locally in your browser. Your data never leaves your computer, ensuring 100% privacy and security.

Get Started

Data Engineer Toolkit

JSON to CSV

Transform raw logic into structured spreadsheets. Instant, browser-based data conversion with advanced flattening logic for deep JSON structures.

Workspace

Input your JSON array on the left and get CSV on the right.

JSON Source

CSV Output

Understanding Data Flattening

JSON (JavaScript Object Notation) is hierarchical, while CSV (Comma Separated Values) is tabular. Converting between them requires Data Flattening.

JSON Array

[
  { "id": 1, "meta": { "tag": "A" } },
  { "id": 2, "meta": { "tag": "B" } }
]

Table Result

id	meta.tag
1	A
2	B

Importing to Excel / Sheets

The UTF-8 Challenge

When importing to Excel, generic CSVs can sometimes break special characters. Our tool uses standard UTF-8 encoding. In Excel, use Data > From Text/CSV and ensure File Origin is set to 65001: Unicode (UTF-8).

Schema Consistency

If your JSON objects have inconsistent keys, our tool performs a Full Outer Join on keys, ensuring no data pillar is missed even if it's absent in the first few objects.

Press ⌘K