LiteDB — Serverless Embedded NoSQL Database for .NET

Introduction

LiteDB is a serverless, zero-configuration embedded NoSQL database for .NET. It stores all data in a single file using a document model similar to MongoDB, making it a practical choice for desktop apps, mobile projects, and small web services that need local persistence without running a separate database server.

What LiteDB Does

• Stores documents as BSON in a single portable data file
• Provides LINQ-style queries and a SQL-like query language
• Supports indexing, transactions, and encryption at rest
• Runs in-process with no external dependencies or background services
• Offers a cross-platform .NET Standard 2.0 library

Architecture Overview

LiteDB uses a page-based storage engine that manages data, indexes, and metadata in one file. Documents are serialized to BSON and organized into collections. A write-ahead log handles crash recovery, and a B-tree index structure supports fast lookups. The engine runs inside the host process, using file-level locking for concurrent access.

Self-Hosting & Configuration

• Add the NuGet package to any .NET project — no installation or server needed
• Specify a file path to create or open a database; the file is created automatically
• Enable password-based AES encryption by passing a connection string with a password parameter
• Configure journaling, cache size, and timeout through connection string options
• Use the LiteDB.Studio desktop tool for visual data browsing and query testing

Key Features

• Single-file storage with ACID transactions
• Thread-safe shared and exclusive access modes for multi-threaded apps
• Full-text search with custom analyzers
• File and stream storage via a built-in GridFS-like API
• Schema-free document model with automatic ID generation

Comparison with Similar Tools

• SQLite — relational and SQL-based; LiteDB is document-oriented with LINQ support
• Realm — targets mobile with live objects; LiteDB is a simpler file-based store for .NET
• RavenDB — full client-server document DB; LiteDB is embedded and zero-config
• NeDB — embedded DB for Node.js; LiteDB serves the same role in the .NET ecosystem
• MongoDB — networked, horizontally scalable; LiteDB is for single-process local use

FAQ

Q: How large can a LiteDB database grow? A: There is no hard-coded size limit. Databases of several gigabytes work fine, though it is designed for small-to-medium data sets rather than big data workloads.

Q: Is LiteDB safe for concurrent writes from multiple threads? A: Yes. It supports shared and exclusive locking modes and handles concurrent access within a single process. Multi-process access to the same file requires external coordination.

Q: Can I use LiteDB in a Blazor or MAUI application? A: Yes. It runs on .NET Standard 2.0, so it works in Blazor Server, MAUI, Xamarin, and any other compatible .NET runtime.

Q: Does LiteDB support migrations or schema changes? A: Because it is schema-free, adding new fields does not require migrations. Renaming or restructuring fields can be done programmatically at the application level.

Sources

• https://github.com/mbdavid/LiteDB
• https://www.litedb.org/