Scalafix
Scalafix: A free, CI-ready Scala refactoring tool with syntactic and semantic rules. Ranked #10 of 22 in Code Refactoring Tools by our editors (7.6/10); pricing: Free plan; best for scala teams enforcing refactoring in CI.
At a glance
- Editor score7.6 / 10
- PricingFree plan
- Best forScala teams enforcing refactoring in CI
- Free planYes
- Paid fromFree
- Refactoring scopeProject
- Founded2016 · Lausanne, Switzerland
- Facts checked22 Sep 2026
Where it wins
- Syntactic and semantic rules support automated code changes
- Project-wide sbt tasks and CI check mode support enforcement
- Custom rules can be published to Maven Central or defined locally
Where it doesn't
- Core language coverage is limited to Scala
- Local desktop tooling is not a hosted SaaS service
- Several integrations rely on externally maintained plugins
Our verdict on Scalafix
Scalafix is an open-source refactoring and linting tool for Scala teams that want automated code changes and diagnostics across a project. It supports Scala 2.12, Scala 2.13, and Scala 3, with built-in rules for import organization, unused code, syntax, and type annotations. Teams can run it locally through its command-line interface or sbt integration, making it suited to developers and CI workflows that need consistent refactoring checks.
Its strongest capability is the combination of syntactic and semantic rules. Syntactic rules can lint and rewrite source files, while semantic rules use SemanticDB and compiler information for decisions that require more context. Scalafix supports fixing individual files or recursively visited directories, along with dry runs, stdout output, diffs, exclusions, and configuration options. Custom rules can be defined locally or published to Maven Central, giving teams a way to extend the tool beyond its built-in rules.
Scalafix is free and open source, with integrations for sbt, scala-cli, Mill, Gradle, Maven, and Mega-Linter. Its sbt support includes project-wide and multi-project tasks, and CI check mode can enforce compliance without applying changes. The main trade-off is focus: Scalafix is designed for Scala rather than a broad set of programming languages, and it runs as a local developer tool instead of a hosted service. Scala teams that want repository-wide refactoring and CI enforcement should consider it; organizations seeking a hosted refactoring platform or wider language coverage should look elsewhere.
Your product? Our editors can test Scalafix in depth and publish a review, labelled as paid · from $149/mo →
Scalafix pricing
Scalafix fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Free |
| Supported languages | Scala 2.12, Scala 2.13, Scala 3 |
| Refactoring scope | Project |
| Batch refactoring | Yes |
| AI assistance | Not verified |
| AST-based analysis | Yes |
| Deployment | Desktop |
| Deployment | Self-hosted |
| Platforms | Windows, macOS, Linux |
| Support | Community, Docs |
| Built for | Small business, Mid-market, Enterprise (editorial estimate) |
| Integrations | 6 integrations: sbt, scala-cli, Mill, Gradle, Maven, Mega-Linter See all → |
| Pricing | Free plan |
| Website | scalacenter.github.io |
| Facts checked | 22 Sep 2026 |
Scalafix integrations
Scalafix lists 6 integrations on its own site.
- sbt
- scala-cli
- Mill
- Gradle
- Maven
- Mega-Linter
See all Scalafix integrations →
Alternatives to Scalafix
- ReSharperA deep Visual Studio refactoring suite with broad analysis and AI assistance.9.2
- ast-grepA free, open-source choice for structural searches, codemods, and custom linting.8.7
- CodeRushA broad Visual Studio refactoring toolkit with a free plan and Windows-only coverage.8.5
See all Scalafix alternatives →
Used Scalafix? Be the first to review it
The editor score above is our own research. What this page doesn't have yet is a reader's view — what you used Scalafix for, what worked and what didn't. No stars are seeded and no review is paid for; an editor reads every one before it appears.
Write a reviewTwo minutes · verified accounts only · read by an editor before it appears
Featured on iTechGuides
Scalafix is listed in our Code Refactoring Tools directory. Add the badge to your site — it links back to this page.
<a href="https://www.itechguides.com/products/scalafix/"><img src="https://www.itechguides.com/best/badge/scalafix.svg" alt="Featured on iTechGuides" width="230" height="46"></a>
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.
Last updated · How we research and update