go-playground/validator

Health v2 · maintenance only

Adoption not part of the score

20132 stars · 1449 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

A Go library for validating structs and individual fields using struct tags, with support for cross-field, cross-struct, and nested map/slice/array validation. It is the default validator for the Gin web framework and supports customizable i18n-aware error messages.

Use cases

• validate request payloads in a Go web API
• validate struct fields with tags in Go
• validate nested slices and maps in Go structs
• add cross-field validation rules to Go structs
• generate localized validation error messages
• validate JSON field names in error output

When to choose

• you need tag-based struct and field validation in Go
• you use Gin and want its default validator
• you need to validate deeply nested data structures
• you need i18n-aware validation error messages

When to avoid

• you need schema validation for raw JSON/YAML documents rather than Go structs
• you want a standalone validation service or CLI
• your project is not written in Go

Facets

library · maturity stable

testing error-handling middleware developer-tools backend web-development go cross-platform struct-validation validation-tags i18n gin field-validation

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