Convert NDJSON / JSONL to Excel
Upload a newline-delimited JSON file (.ndjson or .jsonl) and get a clean Excel spreadsheet. Each line becomes a row. Nested objects are flattened, and all the same data fidelity protections apply: safe big IDs, no formula injection, leading zeros preserved. Processing runs entirely in your browser.
Drag and drop your file here
or click to browse. Accepts .ndjson, .jsonl up to 50 MB.
Your data never leaves your browser. Example: logs.ndjson
How accurate is this? This converter parses your file using deterministic rules (no AI or guessing). The output matches the source data exactly. If you notice any issue, please report it using the link below.
How to Export and Convert NDJSON / JSONL Data
- 1
Get your NDJSON file
NDJSON/JSONL files are common in logging systems, database exports, and streaming APIs. Each line is a valid JSON object.
- 2
Upload the file here
Drag and drop or click to select your .ndjson or .jsonl file.
- 3
Review the preview
Verify column names and data values look correct.
- 4
Download your spreadsheet
Choose XLSX or CSV format.
Frequently Asked Questions
- What is NDJSON?
- NDJSON (Newline Delimited JSON) is a format where each line of the file is a separate, complete JSON object. It is also called JSONL (JSON Lines). It is commonly used for log files, streaming data, and large datasets.
- How is NDJSON different from regular JSON?
- Regular JSON wraps all data in one array: [{...}, {...}]. NDJSON puts each object on its own line with no wrapping array. This makes it easier to stream and append data.
- What if different lines have different keys?
- The converter creates columns for the union of all keys across all lines. Lines that are missing a key get an empty cell for that column.
- Is my data private?
- Yes. Everything runs in your browser. No data is sent to any server.
Related Converters
This tool is not affiliated with or endorsed by NDJSON / JSONL or its parent company. All trademarks belong to their respective owners.