Free and open first
Best Code Formatting Tools in 2026
Keeping code style consistent can make shared projects easier to work with. Compare tools on supported languages and platforms, editor integration, and whether they can format only changed lines or respect ignore files. A library API may matter if you want to call formatting from another application; license model, free-plan availability, and paid-from pricing help clarify access and cost. Accessibility Test Framework for Android, Black, and Prettier illustrate the range of entries here, with Ruff, rustfmt, Biome, dprint, and gofmt also included. Match the listed capabilities to the languages, editors, and workflows your projects use.
- 34 apps
- Research read 23 Sept 2026
- How the order is worked out
- 1
Avidemux
Free plan Open source LinuxMacWeb+1 - 2
Prettier
Free plan Open source APIExtensionLinux+4Prettier offers a consistent formatting workflow through its CLI, editor integrations, and API. Its limited configuration and plugin requirement for additional languages are worth considering.
- 3
Biome
Free plan ExtensionLinuxMac+2Biome provides a free toolchain for formatting and linting web-project code, with editor and CI integration options.
- 4
Black
Free plan LinuxMacSelf-hosted+1Black is a focused Python formatter with editor and automation integrations, plus a check that reformatted code remains effectively equivalent.
- 5
CSharpier
Free plan APILinuxMac+1CSharpier provides an opinionated way to format C# and XML across common development workflows.
- 6
dprint
Free plan ExtensionLinuxMac+2dprint combines broad language coverage with configurable plugins, editor integrations, and CI options. Its process plugins do not run in a sandbox, unlike its WebAssembly plugins.
- 7
Fantomas
Free plan LinuxMacWeb+1Fantomas offers configurable F# formatting and a command-line check for identifying style drift.
- 8
autopep8
Free plan APILinuxMac+1autopep8 offers configurable PEP 8 formatting across major desktop platforms and can be used from commands, hooks, or Python code. Review aggressive changes carefully because some can affect meaning.
- 9
elm-format
Free plan LinuxMacWindowselm-format offers a free way to apply consistent formatting to Elm source code, with command-line and editor workflows. Its scope is focused on Elm rather than multiple languages.
- 10
goimports
Free plan LinuxMacWeb+1goimports combines import cleanup with gofmt-style formatting and can fit into several documented editor workflows.
- 11
clang-format
Free plan ExtensionLinuxMac+1clang-format offers broad language coverage and several ways to apply formatting, from editors to staged Git changes.
- 12
Fourmolu
Free plan LinuxWebWindowsFourmolu offers configurable Haskell formatting, with browser, editor, and CI integration options. Its experimental CPP support and LF-only output are important constraints to consider.
- 13
gofmt
Free plan LinuxMacWindowsgofmt provides a focused way to format Go source, with options for checking differences and applying transformations.
- 14
Ormolu
Free plan LinuxMacWeb+1Ormolu provides a single-style formatter for Haskell with command-line, browser, editor, and language-server paths.
- 15
pgFormatter
Free plan APILinuxSelf-hosted+1pgFormatter offers configurable SQL formatting through console and CGI use, with editor and pre-commit options.
- 16
Ruff
Free plan LinuxMacSelf-hosted+2Ruff combines Python linting, formatting and fixes, with integrations for common editors and CI workflows.
- 17
Scalafmt
Free plan LinuxMacSelf-hosted+1Choose Scalafmt if you need a free, open-source formatter for Scala projects and want to run it through editors, builds, or the command line.
- 18
shfmt
Free plan LinuxMacSelf-hosted+1Choose shfmt for free shell formatting and syntax checking across its supported shell dialects, especially if you want directory processing or editor integration.
- 19
Laravel Pint
Free plan MacSelf-hostedPint provides a straightforward way to apply consistent PHP formatting, with presets and rule customization for projects that need them.
- 20
rustfmt
Free plan LinuxMacWindowsrustfmt covers common Rust formatting workflows, including Cargo, editor use, and CI.
- 21
Taplo
Free plan APIExtensionLinux+2Taplo brings TOML validation, formatting and queries into a free toolkit with multiple installation options.
- 22
Uncrustify
Free plan LinuxMacSelf-hosted+1Uncrustify offers extensive formatting controls and command-line processing across several languages.
- 23
js-beautify
Free plan WebChoose js-beautify if you want a free formatter with browser, command-line, library, and editor integration options.
- 24
OCamlFormat
Free plan LinuxOCamlFormat combines project-level formatting settings with integrations for Dune and other tools. Check its OCaml and Dune requirements before adding it to a project.
- 25
PHP CS Fixer
Free plan LinuxSelf-hostedPHP CS Fixer offers automatic formatting alongside a reporting-only mode, with configurable styles and editor and CI options.
#1Places #1, #2, #3, #4, #5 on this list can be bought by the makers of the software on it. See the price