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Best Kotlin Formatter Alternatives ranked by AI · updated Aug 2026
Kotlin Formatter is the Kotlin code-style formatter built into JetBrains IDEs and documented through Kotlin's official coding conventions. It serves Kotlin developers who prefer conventional, configurable formatting within IntelliJ-based tools.
Top 6 Kotlin Formatter alternatives
IntelliJ IDEA is a powerful Java integrated development environment (IDE) for software developers. It provides advanced coding assistance, intelligent code analysis, and...
Starting at $149/year for individual use
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$29.99/month
ktfmt is an opinionated Kotlin source-code formatter for developers and teams who want consistent formatting with minimal configuration. It is based on...
Pros
- Produces highly consistent formatting with very few style decisions
- Supports command-line, Gradle, Maven, and IntelliJ-based workflows
- Open-source and free for commercial use
Cons
- Opinionated output can conflict with an existing Kotlin style guide
- Offers fewer customization options than IntelliJ formatting
- Can create substantial diffs when adopted in an existing codebase
5
Pinterest
ktlint
ktlint is a Kotlin linter and formatter for teams enforcing Kotlin coding conventions in local development and CI. It combines formatting with...
Pros
- Combines formatting and linting rather than formatting alone
- Provides more configurable rules and extensions than ktfmt
- Has broad Gradle, Maven, IntelliJ, and CI integration
Cons
- More configuration and rule management than ktfmt
- Can produce more style warnings than a formatter-only tool
- Custom rules may require ongoing maintenance
6
Diktat
Sber
Diktat is a Kotlin static-analysis and formatting tool that checks code against an opinionated set of style and design rules. It targets...
Pros
- Checks design and maintainability rules beyond basic formatting
- Includes automated formatting for supported style violations
- Works with Gradle and integrates into CI quality gates
Cons
- Broader ruleset can be noisier than ktfmt
- Requires more policy decisions and configuration than a formatter-only tool
- Smaller community and ecosystem than ktlint
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