Export MySQL table to JSON Lines (JSONL / NDJSON / LDJSON)

Want to export data from MySQL table to JSON lines (JSONL / NDJSON / LDJSON)?

Try Withdata DBToFile, Support Windows, Linux, and macOS, Export MySQL data to JSON lines (JSONL / NDJSON / LDJSON), Easy and Fast.

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• Support Windows, Linux, and macOS.

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JSON Lines text format (JSONL), also called Newline-delimited JSON (NDJSON), or Line-delimited JSON (LDJSON). JSON Lines files may be saved with the file extension .jsonl, *.ndjson, *.ldjson.

Export data from MySQL table to JSON lines (JSONL / NDJSON / LDJSON)

Login to MySQL -> Choose MySQL table -> Set JSON lines file options -> Export MySQL to JSON lines (JSONL / NDJSON / LDJSON)

Choose MySQL and logon.

“Export From Table” for “MySQL to JSON lines (JSONL / NDJSON / LDJSON)”.

Select JSON file type.

1. Choose MySQL table.

2. Set JSON lines (JSONL / NDJSON / LDJSON) file options.

3. Set rows options.

4. Export MySQL data to JSON lines (JSONL / NDJSON / LDJSON) table.

After exporting, you can view output JSON lines (JSONL / NDJSON / LDJSON) file.

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More tools for JSONL / NDJSON / LDJSON.

MySQL → JSON Lines reference

Type mapping

Value kind	in MySQL	in JSON Lines
Int	INT	1234 (number)
Bigint	BIGINT	9007199254740993
Decimal	DECIMAL(p,s)	1234.56 (number)
Float	DOUBLE	1.234e10 (number)
Text	VARCHAR(n)	"text" (string)
Long text	LONGTEXT	"multi-line\ntext"
Date	DATE	"2026-09-18" (string)
Datetime	DATETIME	"2026-09-18T14:30:00Z" (string)
Binary	LONGBLOB	"base64:..." (string)
Boolean	TINYINT(1)	true / false (boolean)
JSON	JSON	nested object on the same line

Dialect differences

MySQL is a database server and JSON Lines is a file format, so the gap is wider than a dialect difference - the rows below are where values and structure stop lining up.

Property	in MySQL	in JSON Lines
port	3306	—
identifiers	`backtick`	Double quotes; backslash escapes (a newline inside a string...
row limit	LIMIT n	—
dates	DATETIME, TIMESTAMP, DATE, TIME	No date type: dates arrive as strings
long text	TINYTEXT / TEXT / MEDIUMTEXT / LONGTEXT	—
binary	BLOB / TINYBLOB / LONGBLOB	Not supported natively - base64 inside a string
separator	—	Newline between records
encoding	—	UTF-8 by definition
typing	—	Same as JSON, but records cannot nest across lines
shape	Tables of rows and columns	Flat stream
ceiling	—	Streams, so it scales past what a single JSON document can ...

Command line

Side	Command
MySQL	mysqldump, or mysql -e "SELECT ..." > out.csv
MySQL (load)	mysqlimport, or LOAD DATA INFILE

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