rustfmt

Overview

rustfmt is ranked #4 of 34 in code formatting tools on Specifiction. It runs on Linux, macOS, Windows. There is a free plan.

Compared on code formatting tools

Supported languages

Rustrust-lang.github.io

Supported platforms

Windows, macOS, Linux, APIrust-lang.github.io

Editor integration

Yesrust-lang.github.io

Ignore files

Yesrust-lang.github.io

Changed-lines formatting

Norust-lang.github.io

Library API

Yesrust-lang.github.io

License model

mixedrust-lang.github.io

Facts

Purpose

Rustfmt formats Rust code according to style guidelines.github.com · 2 Oct 2026

Install

The README says to install rustfmt on the stable toolchain with `rustup component add rustfmt`.github.com · 2 Oct 2026

Cargo

The `cargo fmt` command formats all binary and library targets in a crate and works with Cargo workspaces.github.com · 2 Oct 2026

Input and output

The rustfmt binary can format files or read Rust code from standard input and write formatted output to standard output.github.com · 2 Oct 2026

Configuration

Rustfmt accepts configuration in `rustfmt.toml` or `.rustfmt.toml`, with stable and nightly-only unstable options.github.com · 2 Oct 2026

Editor integrations

The README lists Vim, Emacs, Sublime Text 3, Atom, Visual Studio Code, IntelliJ, and CLion for running rustfmt from an editor.github.com · 2 Oct 2026

CI use

The README describes using `--check` in CI to report formatting differences through an error code.github.com · 2 Oct 2026

Limit: comments

Rustfmt does not currently attempt to format comments, though it formats code that contains comments.github.com · 2 Oct 2026

Limit: macros

The README says some macro declarations and uses are formatted, while macro declarations and uses are listed among rustfmt’s limitations.github.com · 2 Oct 2026

Nightly options

Unstable configuration options are available only on a nightly toolchain and require opt-in.github.com · 2 Oct 2026

License

Rustfmt is distributed under both the MIT License and Apache License 2.0.github.com · 2 Oct 2026

Security contact

The Rust Security Response Working Group handles vulnerability reports and security issues for rust-lang organization repositories.github.com · 2 Oct 2026

Style stability

The Rust Edition Guide describes a formatting stability guarantee intended to avoid noisy formatting changes when updating the Rust toolchain.doc.rust-lang.org · 2 Oct 2026

Direct use

The rustfmt binary formats files in place or reads Rust code from standard input and writes formatted code to standard output.github.com · 3 Oct 2026

Check mode

With `--check`, rustfmt exits with code 0 when no formatting changes are needed and 1 when changes would be made.github.com · 3 Oct 2026

Toolchains

The README says rustfmt runs with Rust 1.24 and above, while the latest version requires the nightly toolchain.github.com · 3 Oct 2026

CI

The README describes using `cargo fmt --all -- --check` to fail a CI build when code is not formatted.github.com · 3 Oct 2026

Limitations

The README lists limitations involving unparsable code, macros, comments, code fragments, non-ASCII Unicode, and bugs.github.com · 3 Oct 2026

IntelliJ and CLion

The IntelliJ and CLion instructions describe enabling rustfmt on save or assigning a shortcut to reformat a file.github.com · 3 Oct 2026

Support

The README points users to `rustfmt --help` and `cargo fmt --help` for command usage and arguments.github.com · 3 Oct 2026

Where it ranks on Specifiction

• Best Code Formatting Tools in 2026#4 of 34

Sources

• github.com/rust-lang/rustfmt· checked 2 Oct 2026
• github.com/rust-lang/rustfmt/security· checked 2 Oct 2026
• doc.rust-lang.org/edition-guide/rust-2024/rustfmt-style-e· checked 2 Oct 2026
• github.com/rust-lang/rustfmt/blob/main/intellij.md· checked 3 Oct 2026