Import JSON Lines (JSONL / NDJSON / LDJSON) to SQLite

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Want to import data from JSON Lines (JSONL / NDJSON / LDJSON) file to SQLite ?

Try Withdata FileToDB, a desktop JSONL to SQLite converter for Windows, MacOS, and Linux, Import JSON Lines to SQLite, Easy and Fast.

  • Can run in GUI mode, Step by Step, just a few mouse clicks.
  • Can run in Command line, for Scheduled Tasks and Streams.
  • Convert locally and privately, avoid uploading large or private JSONL file(s) to online services.

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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.

Import data from JSON Lines (JSONL / NDJSON / LDJSON) file to SQLite

Login to SQLite -> Choose JSON Lines file -> Set SQLite table -> Import JSON Lines to SQLite

Choose SQLite and logon.

load JSON Lines data to SQLite table - Choose SQLite and logon

Click “Wizard – 1 File To 1 Table” at task dialog.

import JSON Lines data to SQLite table - task window

Select the “JSON” file type.

Import JSON Lines file data to SQLite table - select file type

then show the wizard.

1. Open a JSON Lines (JSONL / NDJSON / LDJSON) file.

Support large ( > 4GB ) JSON Lines file.

Import Data From JSON Lines File To SQLite - open JSON Lines file

Here is the file’s content.

Import Data From JSON Lines File To SQLite - source JSON Lines file

FileToDB will parse JSON Lines file.

2. Select a SQLite table and config fields.

Load Data From JSON Lines File To SQLite - select table

3. Preview data will be in SQLite table.

Transfer Data From JSON Lines File To SQLite - preview

4. Import JSON Lines data to SQLite.

Import Data From JSON Lines File To SQLite - import data

View imported data in SQLite table

Convert JSON Lines to SQLite - view data

Convert JSON Lines (JSONL / NDJSON / LDJSON) to SQLite in command line

Save “JSON Lines to SQLite” session, then you can:

Set scheduled tasks for converting JSON Lines (JSONL / NDJSON / LDJSON) to SQLite

You can schedule and automate this “JSON Lines to SQLite” conversion task by:

  1. Save session and create .bat (Windows) or .sh (Linux/macOS) file for “JSON Lines to SQLite” conversion.
  2. Set scheduled task for “JSON Lines to SQLite” conversion.

FAQ

More tools for JSONL / NDJSON / LDJSON.

JSON Lines → SQLite reference

Type mapping

Value kindin JSON Linesin SQLite
Int1234 (number)INTEGER
Bigint9007199254740993INTEGER
Decimal1234.56 (number)NUMERIC
Float1.234e10 (number)REAL
Text"text" (string)TEXT
Long text"multi-line\ntext"TEXT
Date"2026-09-18" (string)TEXT
Datetime"2026-09-18T14:30:00Z" (string)TEXT
Binary"base64:..." (string)BLOB
Booleantrue / false (boolean)INTEGER
JSONnested object on the same lineTEXT

Dialect differences

JSON Lines is a file format and SQLite is a database server, so the target has to be told the types the file never carried - the rows below are where the two sides diverge.

Propertyin JSON Linesin SQLite
port—(file-based)
identifiersDouble quotes; backslash escapes (a newline inside a string..."double quotes" or [brackets]
row limit—LIMIT n
datesNo date type: dates arrive as stringsTEXT (no date type)
long text—TEXT
binaryNot supported natively - base64 inside a stringBLOB
separatorNewline between records—
encodingUTF-8 by definition—
typingSame as JSON, but records cannot nest across lines—
shapeFlat streamTables of rows and columns
ceilingStreams, so it scales past what a single JSON document can ...—

Command line

SideCommand
SQLitesqlite3 .dump
SQLite (load).import (sqlite3)

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