Encoding/json
encoding/json is Go’s standard-library package for encoding Go values as JSON and decoding JSON into Go values.
Learn Go with Pocket-Sized Projects
encoding/json is Go's standard-library package for encoding and decoding JSON data.
- How it is used
- Parses structured JSON files and messages into Go values while also supporting the reverse encoding direction.
- How deep it goes
- Explains structure matching, tags, exported fields, streaming decoding, and errors, while deferring detailed HTTP response decoding.
- Examples
- Demonstrates decoding a bookworm-and-books JSON file into tagged Go structures and printing the resulting slice.
- What you can do after
- Apply via encoding/json to decode files into exported, tagged Go structures and handle failures returned by the decoder.
Read how Learn Go with Pocket-Sized Projects explains encoding/json →
Go in Action, Second Edition
encoding/json is Go's standard-library package for encoding Go values as JSON and decoding JSON into Go values.
- How it is used
- Supports parsing, validating, and producing JSON in a configuration and format-conversion CLI.
- How deep it goes
- Works through struct tags and unmarshaling, then shows custom methods for validation and redaction.
- Examples
- Uses a server configuration JSON file, a tagged Config struct, host URL validation, and host redaction.
- What you can do after
- Build it from scratch: decode a JSON configuration into a Go struct and customize validation or serialized output.
Read how Go in Action, Second Edition explains encoding/json →
Related concepts
- packagekind of · A package is a programming-language namespace and organizational unit that groups related code and may define import, compilation, or access boundaries.
- JSONuses · JSON is a standardized, language-independent text format for representing structured data using objects, arrays, strings, numbers, Boolean values, and null.
- standard librarypart of · A standard library is a collection of reusable modules, types, functions, APIs, and other facilities distributed with a programming language implementation or platform.
- struct taguses · A struct tag is metadata attached to a Go struct field that guides reflection-based processing such as serialization and field mapping.
- serializationuses · Serialization is the encoding of structured data or in-memory values into a representation suitable for storage or transmission and later reconstruction.
- Mapuses · A map is an associative data structure that stores key-value pairs and supports retrieving values by key.
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