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Version: v4.5.x


The documentation for Fastify is split into two categories:

The reference documentation utilizes a very formal style in an effort to document Fastify's API and implementation details thoroughly for the developer who needs such. The guides category utilizes an informal, educational, style as a means to introduce newcomers to core, and advanced, Fastify concepts.

Where To Start

Complete newcomers to Fastify should first read our Getting Started guide.

Developers experienced with Fastify should consult the reference documentation directly to find the topic they are seeking more information about.

Additional Documentation