JSONL to CSV Converter

Convert line-delimited JSON (JSONL or NDJSON) to CSV for logs, API exports, and AI datasets directly in your browser.

Choose a JSONL or NDJSON file

Drop file here or click to browse

Choose File

Checks before and after data conversion

Keep the source file and confirm its encoding and data format.
Check whether the first row contains headers and whether field names look correct.
For personal or sensitive data, confirm where processing happens and who will receive the output.

Use the preview to verify text, column names, and row counts.
Open the result in Excel or the destination system and check dates and long numbers.
Save the converted file under a new name so it can be compared with the source.

Fix CSV character encoding before opening the data in Excel or continuing the workflow.

Turn JSON into a portable CSV for spreadsheets and downstream systems.

Export Parquet data as CSV for quick inspection and easier sharing.

Each JSONL or NDJSON line becomes one CSV row. Nested objects are flattened into columns such as user.name for spreadsheet review.

Read one JSON value per line without requiring a surrounding array. Arrays and complex values are preserved as JSON strings inside CSV cells.

JSON

Stores one complete array or object as a single JSON document.

JSONL / NDJSON

Stores one independent JSON value per line for logs and streaming workflows.

Yes. JSONL and NDJSON are read as the same one-value-per-line format.

Nested objects become dot-notation columns such as user.name.

No. Conversion runs in your browser.

The guide section covers format differences, compression tips, and common PDF workflows.