Convert CSV to JSON Lines
Turn Comma-separated values files (.csv) into JSON Lines / NDJSON (.jsonl) in seconds. Drop one file or a whole batch: the conversion happens right in your browser, with no sign-up, no watermark and no upload.
JSON Lines to CSV insteadHow to convert CSV to JSON Lines
- 1Drop your CSV files into the box above, or click to choose them.
- 2JSON Lines is already selected. Adjust the options if you like.
- 3Click Convert and download your JSON Lines files.
Good to know
- Column types such as numbers and true/false values are detected, and you can set the delimiter and header row.
Frequently asked questions
Is converting CSV to JSON Lines free?
Yes. There is no sign-up, no watermark and no limit on the number of files.
Are my files uploaded?
No. Everything runs in your browser, so your files are never uploaded to a server. That also makes it fast, because nothing has to travel over the network.
Will I lose quality converting CSV to JSON Lines?
No noticeable loss: the conversion keeps the content of your CSV file intact.
Can I convert several files at once?
Yes. Drop as many CSV files as you like. They are converted one after another and you can download them individually or as a ZIP.
Is there a file size limit?
There is no fixed limit. Very large files depend on your device's memory, since the conversion runs locally.
What is CSV?
CSV is a simple text format for tables that every spreadsheet and database can import.
What is JSON Lines?
JSON Lines stores one JSON record per line, which is handy for logs, streaming and large datasets.