How to open a .ndjson file: without installing anything

How to open a .ndjson file

A .ndjson is a NDJSON file: One JSON object per line. Streams and appends cleanly. Excel, Google Sheets, Numbers, LibreOffice Calc, any text editor open it. Or drop it below: it opens and converts in your browser, nothing to install.

Drop files here or click to chooseSeveral files at once are fine.

🔒 Nothing is uploaded. Check the Network tab of your browser: it stays empty.

Three ways to open it

Drop the .ndjson file above: it opens and converts right here, nothing to install.
For a desktop app: Excel, Google Sheets, Numbers, LibreOffice Calc, any text editor.
If it still will not open, convert it to CSV, that is what most people are really after.

Convert a .ndjson

NDJSON → CSV NDJSON → TSV NDJSON → XLSX NDJSON → XLS NDJSON → ODS NDJSON → JSON NDJSON → YAML NDJSON → XML

Questions

What program opens a .ndjson file?

Excel, Google Sheets, Numbers, LibreOffice Calc, any text editor. Or drop it here, without installing anything.

Why won't my .ndjson open?

Either the viewer does not know NDJSON (one json object per line. streams and appends cleanly.), or the file is damaged or misnamed. Converting to CSV fixes the first case.

Is it safe to open a .ndjson here?

Yes: the file is read in your browser and never leaves your device.