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what is lowdb fr?

typicode/lowdb — explained in plain English

Analysis updated 2026-06-21

22,528JavaScriptAudience · developerComplexity · 1/5LicenseSetup · easy

tl;dr

A tiny JavaScript library that uses a local JSON file as a simple database, read and write persistent data with plain JavaScript array methods, no database server required.

vibe map

mindmap
  root((lowdb))
    What it does
      JSON file as database
      No server required
      JavaScript object API
    Features
      TypeScript support
      Browser localStorage
      In-memory test mode
    Use Cases
      CLI tools
      Electron desktop apps
      Rapid prototyping
    Tech Stack
      JavaScript
      TypeScript
      Node.js

Code map

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filefunction / class

what do people make with this?

VIBE 1

Add data persistence to a small CLI tool without setting up a database server.

VIBE 2

Store app settings or user data in an Electron desktop app using a local JSON file.

VIBE 3

Prototype a web API quickly with a JSON file as the data store before switching to a real database.

VIBE 4

Save and retrieve data in a browser-based app using localStorage through the same lowdb API.

what's the stack?

JavaScriptTypeScriptNode.js

how it stacks up fr

typicode/lowdbjlmakes/scrollrevealredux-saga/redux-saga
Stars22,52822,50122,472
LanguageJavaScriptJavaScriptJavaScript
Setup difficultyeasyeasymoderate
Complexity1/52/53/5
Audiencedeveloperdeveloperdeveloper

Figures from each repo's GitHub metadata at analysis time.

how do i run it?

Difficulty · easy time til it works · 5min
MIT license, use freely for any purpose including commercial, keep the copyright notice.

in plain english

Lowdb is a small, simple database that stores data as a JSON file on your computer or device. Think of it like a notepad your app can read and write to, rather than a full database server. It solves the problem of needing to save and retrieve data without setting up complex database infrastructure. It works by reading a JSON file into memory as a plain JavaScript object, letting you modify it using regular JavaScript methods, then saving it back to the file when you are done. Because your data is just a JavaScript object, you search and filter it using the same array methods you already know, like finding an item by its ID or sorting a list by a field. You would use lowdb when building small projects, prototypes, desktop apps built with Electron, command-line tools, or any situation where you want persistent data storage without the overhead of a database server. It also supports storing data in the browser's local storage or session storage instead of a file. The library supports TypeScript for type checking, meaning you can define the shape of your data and catch mistakes before running your code. It can also be extended with additional utility libraries. It automatically switches to an in-memory mode during automated tests to keep things fast. Lowdb is a JavaScript library installable via npm.

prompts (copy fr)

prompt 1
Show me how to use lowdb to store and retrieve a list of to-do items in a JSON file from a Node.js script.
prompt 2
Write a TypeScript-typed lowdb setup for an Electron app that saves user preferences to a local file.
prompt 3
How do I search and filter records stored in lowdb the same way I would filter a JavaScript array?
prompt 4
Set up lowdb to use localStorage as the backend in a browser app instead of the filesystem.
prompt 5
Explain how lowdb handles concurrent writes and whether it is safe for a multi-user web server.

Frequently asked questions

what is lowdb fr?

A tiny JavaScript library that uses a local JSON file as a simple database, read and write persistent data with plain JavaScript array methods, no database server required.

What language is lowdb written in?

Mainly JavaScript. The stack also includes JavaScript, TypeScript, Node.js.

What license does lowdb use?

MIT license, use freely for any purpose including commercial, keep the copyright notice.

How hard is lowdb to set up?

Setup difficulty is rated easy, with roughly 5min to a first successful run.

Who is lowdb for?

Mainly developer.

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