What’s New in IntelliJ IDEA 2025.3? Smaller Unified Edition and Full Spring Boot 4 Support

Unified Edition: Smaller and Higher Quality

The biggest change is merging the Community and Ultimate editions into a single IntelliJ IDEA 2025.3 distribution, reducing the Ultimate edition size by about 30% and eliminating the need for separate testing and releases.

No longer need multiple test and release pipelines for different editions.

Build chain complexity is reduced.

Resources can focus on overall quality.

Ultimate edition size decreased by 30%.

The long‑standing issue where the uninstaller failed after an update is also fully resolved.

Development Experience: Quieter, Smoother Workflow

Unnecessary warnings about incomplete indexing have been removed.

The “Indexing” process is renamed to the more accurate “Analyzing project”. Find Usages now shows relative paths for clearer navigation.

UI and assistive‑technology support (e.g., screen readers) has been comprehensively strengthened.

New Islands Theme makes active tabs more noticeable and improves readability.

Spring Support: Full Compatibility with Spring Framework 7 and Spring Boot 4

IntelliJ IDEA 2025.3

provides complete support for the latest Spring versions, including API version control, HTTP client integration, dynamic BeanRegistrar registration, and JSpecify null‑safety annotations, offering full recognition, validation, and navigation.

Language Support: Java, Kotlin, Scala Enhancements

Java: Full coverage of Java 25 features, toolchain updates, runtime compatibility, and inspector fixes.

Kotlin: Major improvements for Spring ecosystem compatibility and migration toward the K2 compiler.

Scala: Support for Structural Search & Replace, smoother UI operations, and optional built‑in inspections to boost performance.

GitHub / GitLab Integration

Files are no longer automatically marked as reviewed when opened, and multi‑line comments receive a complete, clear UI.

Terminal and Build‑Tool Optimizations

The new terminal implementation is enabled in PowerShell for Windows, delivering performance gains, bug fixes, and visual enhancements.

Build tools improvements:

Maven and Gradle are more stable when running Micronaut and Spring projects.

The Dependency Analyzer interaction experience has been refined.

Web Development: Better Module Resolution and Monorepo Support

Understanding of

tsconfig.json

customConditions

is improved.

package.json

exports + development

conditions are correctly recognized. TypeScript project references are resolved across packages.

No longer need to replace .mts with .mjs manually.

Node.js, Bun, and Deno are unified under a single “JavaScript Runtime” settings page.

Performance Optimizations: Faster UI and Less Lag

UI response speed is increased.

TypeScript syntax highlighting is significantly faster.

HTTP client and code navigation lag issues are fixed.

Large projects operate more smoothly overall.