#1 Viper
Go configuration with fangs.
github.com/knadh/koanf
Koanf
Simple, extremely lightweight, extensible, configuration management library for Go. Supports JSON, TOML, YAML, env, command line, file, S3 etc. Alternative to viper.
Decision Signals
Health score 95/100, confidence 100/100.
Install
go get github.com/knadh/koanf
Package Data
updated May 28, 2026| Latest version | v1.5.0 |
| Imported by | 540 packages |
| Stars | 4.0K |
| Forks | 186 |
| Last activity | 7 days ago |
| Latest release | v2.3.4 (2 months ago) |
| License | MIT |
| Known vuln records | 0 |
API Surface
77 symbols| Symbol | Kind | Synopsis |
|---|---|---|
| Conf | Type | type Conf struct{ ... } |
| Conf.Delim | Field | Delim string |
| Conf.StrictMerge | Field | StrictMerge bool |
| KeyMap | Type | type KeyMap map[string][]string |
| Koanf | Type | type Koanf struct{} |
| Koanf.All | Method | func (ko *Koanf) All() map[string]interface{} |
| Koanf.Bool | Method | func (ko *Koanf) Bool(path string) bool |
| Koanf.BoolMap | Method | func (ko *Koanf) BoolMap(path string) map[string]bool |
| Koanf.Bools | Method | func (ko *Koanf) Bools(path string) []bool |
| Koanf.Bytes | Method | func (ko *Koanf) Bytes(path string) []byte |
| Koanf.Copy | Method | func (ko *Koanf) Copy() *Koanf |
| Koanf.Cut | Method | func (ko *Koanf) Cut(path string) *Koanf |
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