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Top 23 Go Validation Projects
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validator
:100:Go Struct and Field validation, including Cross Field, Cross Struct, Map, Slice and Array diving
Why not use popular Go libraries like Package validator or govalidator? While both libraries are well-known, validatorgo focuses on standalone string validation and provides an extensive collection of customizable validators inspired by validator.js, which neither of these Go libraries fully implement.
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Why not use popular Go libraries like Package validator or govalidator? While both libraries are well-known, validatorgo focuses on standalone string validation and provides an extensive collection of customizable validators inspired by validator.js, which neither of these Go libraries fully implement.
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ozzo-validation
An idiomatic Go (golang) validation package. Supports configurable and extensible validation rules (validators) using normal language constructs instead of error-prone struct tags.
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protoc-gen-validate
Protocol Buffer Validation - Being replaced by github.com/bufbuild/protovalidate
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The most effective way to integrate OPA with Kubernetes is to use OPA Gatekeeper, a dynamic admission controller. It lets you enforce the admission policies of your K8s resources at the admission stage to ensure that any resources created or modified comply with your pre-configured policy.
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filetype
Fast, dependency-free Go package to infer binary file types based on the magic numbers header signature
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Package govalidator
Validate Golang request data with simple rules. Highly inspired by Laravel's request validation. (by thedevsaddam)
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Validate
⚔ Go package for data validation and filtering. support Map, Struct, Form data. Go通用的数据验证与过滤库，使用简单，内置大部分常用验证、过滤器，支持自定义验证器、自定义消息、字段翻译。
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I'm surprised the author doesn't mention ConnectRPC: https://connectrpc.com/
It solves ALL the problems of vanilla gRPC, and it even is compatible with the gRPC clients! It grew out of Twirp protocol, which I liked so much I made a C++ implementation: https://github.com/Cyberax/twirp-cpp
But ConnectRPC guys went further, and they built a complete infrastructure for RPC. Including a package manager (buf.build), integration with observability ( https://connectrpc.com/docs/go/observability/ ).
And most importantly, they also provide a library to do rich validation (mandatory fields, field limits, formats, etc): https://buf.build/bufbuild/protovalidate
Oh, and for the unlimited message problem, you really need to use streaming. gRPC supports it, as does ConnectRPC.
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jsonschema
JSONSchema (draft 2020-12, draft 2019-09, draft-7, draft-6, draft-4) Validation using Go (by santhosh-tekuri)
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encoding
Go package containing implementations of efficient encoding, decoding, and validation APIs.
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graphql-go-tools
GraphQL Router / API Gateway framework written in Golang, focussing on correctness, extensibility, and high-performance. Supports Federation v1 & v2, Subscriptions & more.
Project mention: An Introduction to Cosmo Router — Blazingly Fast Open-Source Federation V1/V2 Gateway | dev.to | 2025-03-10The Cosmo Router is powered by graphql-go-tools , a highly mature and optimized GraphQL engine (MIT License) that is the fastest and most reliable implementation for Federation V1 . The Cosmo Router builds on it with its own optimizations.
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valgo
Valgo is a type-safe, expressive, and extensible validator library for Golang. Supports localization and is built with generics.
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wiretap
The world's coolest API Validation and compliance tool. Validate APIs against OpenAPI specifications and much more (by pb33f)
During the API development phase, a detailed definition guides developers in implementing endpoints, methods, and data schemas correctly. Various tooling exists to ensure your code conforms to the agreed upon spec - including API frameworks like Huma which allow you to build APIs around a spec, as well as API contract testing tools like Wiretap which look at live traffic to detect violations.
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NOTE:
The open source projects on this list are ordered by number of github stars.
The number of mentions indicates repo mentiontions in the last 12 Months or
since we started tracking (Dec 2020).
Go Validation discussion
Go Validation related posts
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cue VS rcl - a user suggested alternative
2 projects | 15 Mar 2025 -
StrictYAML
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Developing a Simple RESTful API with Gin, ginvalidator, and validatorgo
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Show HN: Holos – Configure Kubernetes with CUE data structures instead of YAML
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Ask HN: Happy Thanksgiving What technology are you thankful for?
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Simplifying String Validation in Go: Introducing validatorgo
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Como Validar Dados em Golang?
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A note from our sponsor - SaaSHub
www.saashub.com | 21 Mar 2025
Index
What are some of the best open-source Validation projects in Go? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | validator | 17,838 |
| 2 | govalidator | 6,126 |
| 3 | cue | 5,333 |
| 4 | ozzo-validation | 3,873 |
| 5 | protoc-gen-validate | 3,869 |
| 6 | gatekeeper | 3,815 |
| 7 | kubeconform | 2,488 |
| 8 | filetype | 2,156 |
| 9 | kpt | 1,753 |
| 10 | Package govalidator | 1,331 |
| 11 | email-verifier | 1,331 |
| 12 | go-proto-validators | 1,090 |
| 13 | Validate | 1,089 |
| 14 | protovalidate | 1,043 |
| 15 | jsonschema | 1,021 |
| 16 | encoding | 1,003 |
| 17 | graphql-go-tools | 725 |
| 18 | checkmail | 720 |
| 19 | valgo | 445 |
| 20 | validating | 226 |
| 21 | grimoire | 164 |
| 22 | wiretap | 155 |
| 23 | gody | 124 |
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