What’s New in IntelliJ IDEA 2025.3 Unified Edition? A Feature Deep‑Dive

IDEA 2025.3 Unified Edition

The 2025.3 release merges IntelliJ IDEA Ultimate and Community into a single installer. A subscription unlocks premium features, but the free edition can be used for commercial and non‑commercial projects without restriction.

Features Available to All Users

Database integration: create connections, view schemas and objects directly in the IDE.

Spring project wizard for quick Spring Boot project generation.

Framework code highlighting for Spring, Jakarta EE, Thymeleaf and other templates.

Full SQL language support.

Command Completion

Command Completion extends the traditional . code completion by also suggesting IDE actions such as refactorings, code generation and quick‑fixes.

Type . to see both code suggestions and IDE actions.

Type .. to filter the list to IDE actions only.

Select an action to preview its effect before execution.

Example: typing ..rename directly finds the rename refactoring.

Full Java 25 Support

IDEA 2025.3 ships with out‑of‑the‑box support for Java 25, the next LTS release. Bundled tools such as Async Profiler 4.1 and JaCoCo are compatible, and major JDK 25 builds (Oracle OpenJDK, IBM Semeru J9, GraalVM, Microsoft Build of OpenJDK) can be downloaded from the IDE.

Islands Theme

The new Islands theme becomes the default appearance, offering higher contrast, clearer workspace separation and rounded UI elements.

AI Experience Upgrades

Multiple AI agents (Junie and Claude Agent) can be switched within a single chat window.

Transparent AI quota tracking shows remaining credits, renewal dates and balance directly in the IDE.

Upcoming “Bring Your Own Key” feature will allow users to connect their own OpenAI‑compatible API keys.

Technology Stack Support Updates

JUnit 6 with unified artifact versions and baseline Java 17.

Gradle 9 with configuration cache as the default execution mode.

Groovy 5 targeting JDK 11 for better Java 25 compatibility.

Scala 3.8 adding the into modifier and raising the minimum JDK to 17.

Develocity IntelliJ Plugin

The plugin brings build‑performance analysis into the IDE. It visualises detailed build characteristics, helps spot bottlenecks and shows the impact of changes without modifying build scripts. Currently supports Gradle; Maven support is forthcoming.

Ultimate‑Only Features

Spring Boot 4 and Spring Framework 7 Support

Enhanced support includes API version control, HTTP client generation and dynamic bean registration handling for Spring Framework 7 and Spring Boot 4.

Spring Data JDBC Support

Generate entity classes from existing tables, including composite keys.

Generate DDL from @Table classes, with Liquibase and Flyway integration.

Compare code models with databases and create alignment scripts.

Instantly create Spring Data repositories linked to code.

Smart completion for derived repository query methods.

Add table columns directly via completion in entity classes.

Spring Debugger Updates

Remote application debugging via an open debug port.

Automatic database connection when the application starts.

Kubernetes Experience Improvements

Deploy databases and services directly from the editor with cluster and namespace selectors, real‑time resource status icons, one‑click log fixes, secret management and port‑forwarding for instant connections.

Installer Size Reduction

The unified installer is approximately 30 % smaller than the previous Ultimate‑only installer.