Go Code Formatter & Beautifier

Go is one of the few languages where formatting is not a matter of opinion — gofmt defines the canonical style, and virtually all Go code follows it. But when you copy Go code from a browser, receive it in a chat message, or generate it with an AI tool, the formatting is often lost. This tool restores it.

What Is a Go Formatter?

A Go formatter takes Go source code and restructures it according to the canonical gofmt style. Go’s formatting rules are intentionally simple and non-configurable: tabs for indentation, specific spacing rules, and a single brace style. This tool applies those same rules in your browser, producing output that matches what gofmt would produce.

This tool supports:

• Tab indentation — the Go standard (no spaces debate in Go)
• Canonical brace placement — opening brace on the same line (mandatory in Go)
• Import grouping — standard library, then external packages, then local packages
• Consistent spacing — around operators, in struct literals, in function signatures

Go Formatting Philosophy

Go took a radical approach to code formatting: there is exactly one correct format, enforced by gofmt, and the entire community uses it. This means:

• Tabs for indentation — not spaces (the only major language to mandate tabs)
• Opening brace on the same line — func main() { — putting it on the next line is a syntax error
• No trailing semicolons — the lexer inserts them automatically
• goimports organizes imports into groups separated by blank lines
• No line length limit — but the community uses reasonable line lengths
• No configuration — gofmt has no options, no config files, no style arguments

Common Use Cases

Pasting code from documentation: Go tutorials, blog posts, and documentation often have formatting artifacts from HTML rendering. Format the code after pasting to restore proper structure.

AI-generated Go code: AI models sometimes produce Go code with spaces instead of tabs or inconsistent formatting. Run it through the formatter before using it.

Cross-platform editing: When Go code is edited on systems with different line endings or tab display settings, formatting can drift. This tool normalizes it.

Code review preparation: Even though most Go editors auto-format on save, code received via email, chat, or issue trackers may not be formatted. Format before reviewing.

Frequently Asked Questions

Does this produce the same output as gofmt? This tool aims to match gofmt’s formatting rules: tabs for indentation, canonical brace placement, and standard spacing. For authoritative formatting, use gofmt or goimports in your development workflow.

Does it handle Go generics (type parameters)? Yes. Go 1.18+ generics syntax including type parameters (func Map[T any, U any](s []T, f func(T) U) []U) and type constraints are formatted correctly.

Can it format Go templates? The formatter handles Go source code (.go files). Go text/template and html/template syntax embedded in other file types is not supported.

Is my Go code sent to a server? No. All formatting runs entirely in your browser. No code is transmitted to any server. Your source code never leaves your device.