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How to Validate Go Code - Step by Step Guide

Step 1

Input Your Go Code

Get started by adding your Go code for validation. The validator checks syntax, naming conventions, and common mistakes:

•
Paste directly: Copy your Go code from your editor
•
Upload a file: Click "Upload" to select a .go file from your Go module
•
Try the sample: Load example code to see validation in action

Example: Go Code with Potential Issues

Here's Go code that might have errors:

function greet() {
    fmt.Println("Hello")
}

Issues: Should use func instead of function, and missing package declaration.

Step 2

Automatic Validation

The validator automatically checks your Go code and provides instant feedback:

•
Syntax validation: Checks for balanced braces, brackets, and parentheses
•
Common mistakes: Catches function vs func, null vs nil
•
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Error handling patterns: Warns about unchecked error returns
Step 3

Review Errors & Warnings

Get detailed feedback with line numbers and clear explanations:

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Errors: Critical issues that prevent compilation
•
Warnings: Best practice violations and style suggestions
•
Valid: Code passes all validation checks
Step 4

Fix Issues & Revalidate

Use the feedback to improve your code, then validate again:

•
Copy errors: Export all errors and warnings to fix in your IDE
•
Real-time validation: See updates as you fix issues
•
Format your code: Use the Go Formatter after validation

Frequently Asked Questions

What errors does the Go validator catch?

The validator catches 14+ types of issues including: unbalanced braces/brackets/parentheses, incorrect keywords (function vs func), wrong null values (null vs nil), incorrect receiver patterns (this vs method receivers), and naming convention violations (PascalCase for exported, camelCase for private).

Is this the same as go vet or go build validation?

No, this is a lightweight online validator that catches common syntax errors and style issues. For full compilation validation, use go build or go vet. This tool is perfect for quick syntax checks, learning Go, or validating code snippets before sharing.

Does it check for goroutine and concurrency errors?

This validator focuses on syntax and common mistakes. It doesn't perform the complex race condition or concurrency analysis that the Go compiler and race detector do. For concurrency validation, use go run -race. However, it does warn about unchecked error returns which is important for robust Go code.

Can I validate large Go files?

Yes! The validator handles files up to 10MB efficiently. It provides real-time validation (500ms debounce) as you type or paste code. For very large projects with multiple files, consider using gopls or staticcheck in your IDE.

How is this different from golangci-lint?

golangci-lint is a comprehensive meta-linter that runs locally and provides hundreds of lint checks. This online validator focuses on syntax validation and the most common beginner mistakes. It's instant, requires no installation, and works in your browser. Use this for quick checks and learning, and golangci-lint for production code.

Is the Go validator completely free?

Yes, totally free with no limitations on file size, usage frequency, or features. No registration required, and you can validate unlimited Go code with detailed error messages and line numbers. Perfect for Go learners and developers!

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