EJDB2 review

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

EJDB2 is an open-source, embeddable JSON database engine for developers building applications with local data storage. Its document-oriented model uses single-file databases and the JQL query language to query and update JSON documents. The product is especially suited to solo developers and teams that need embedded storage inside C or C++ applications, while its documented company-size fit also includes small, mid-market, and enterprise organizations. It supports macOS, iOS, Linux, and Windows.

The core feature set is focused but capable for an embedded document database. A C11 API provides the main application interface, while JSON field indexes and collection joins support more structured document work. Online backups add a database-management function, and optional HTTP REST and WebSocket endpoints provide network access. Native language bindings broaden access beyond the core C and C++ use case. This combination makes EJDB2 a practical fit when an application needs local JSON storage in a single file without adopting a separate database service. It is less suitable for teams seeking a broad platform ecosystem or a product centered on AI capabilities, since AI features are not included.

EJDB2 follows an open-source pricing model, with the database engine, JQL interface, indexes, joins, backups, and endpoint options forming the main product scope rather than separate paid tiers. Documentation and community support are the listed support channels, so teams should be comfortable working within those resources. Choose EJDB2 when embedded JSON storage, native application integration, and local deployment are priorities. Consider another option when your requirements depend on a different database model, a wider documented platform range, or dedicated support channels beyond community and documentation.

EJDB2 pros and cons

• Where it wins
  • Single-file storage with JSON indexes, joins, and online backups
  • C11 API for C and C++ applications
  • REST and WebSocket endpoints plus native language bindings
• Where it doesn't
  • Its primary application interface is centered on C and C++
  • Support channels are limited to community resources and documentation
  • No AI features are included

EJDB2 fact sheet, pricing and score →

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Last updated 7 Oct 2026 · How we research and update