# Kotlin : A concise multiplatform language developed by JetBrains | The JetBrains Blog Developer Tools for Professionals and Teams This is one page of public article previews, not the complete archive. Follow Next page to continue. Summaries are not the original full articles. ## Kotlin 2.4.20 Released DevFeed: [Kotlin 2.4.20 Released]() Original publisher: [Read original article]() Author: Daniel Csorba Published: 2026-09-07T11:30:57Z Content type: release Language: en Sources: [Kotlin : A concise multiplatform language developed by JetBrains | The JetBrains Blog](), [The JetBrains Blog]() Topics: [releases](), [Command-line interface](), [Android Studio](), [IntelliJ IDEA]() Tags: [android-studio](), [command-line](), [features](), [github](), [gradle](), [intellij](), [issue-tracker](), [kotlin](), [release](), [releases](), [swift](), [testing](), [wasm](), [youtrack]() ### AI overview Kotlin 2.4.20 adds standard-library, compiler, build-tool, Kotlin/Native, Kotlin/Wasm, and Kotlin/JS updates. The article also explains how to update Kotlin in supported IDEs or obtain the command-line compiler. ### Source excerpt The Kotlin 2.4.20 release is out! Here are the main highlights: For the complete list of changes, see What's new in Kotlin 2.4.20 or the release notes on GitHub. How to install Kotlin 2.4.20 The latest version of Kotlin is included in the latest versions of IntelliJ IDEA and Android Studio. To update to the [...] ## Kotlin Toolchain 0.12: Multiplatform Library Publishing, Wasm Apps, and More DevFeed: [Kotlin Toolchain 0.12: Multiplatform Library Publishing, Wasm Apps, and More]() Original publisher: [Read original article]() Author: Joffrey Bion Published: 2026-09-03T10:40:05Z Content type: release Language: en Sources: [Kotlin : A concise multiplatform language developed by JetBrains | The JetBrains Blog]() Topics: [toolchain](), [multiplatform](), [compose-hot-reload](), [web applications](), [Spring Boot 4]() Tags: [compose-hot-reload](), [gradle](), [intellij-idea](), [kotlin](), [multiplatform](), [news](), [publication](), [releases](), [toolchain](), [toolchains](), [wasm]() ### AI overview Kotlin Toolchain 0.12.0 adds multiplatform library publishing and previews support for building Wasm modules as web applications. It also includes command-line Compose Hot Reload and changes intended to reduce Maven Central publication files. ### Source excerpt Kotlin Toolchain 0.12.0 is out. This release brings some long-awaited features: multiplatform libraries publication, a preview of Wasm application support, Compose Hot Reload from the command line, and more. Read on for the details, and check the release notes for the full list of changes and bug fixes. Additionally, klibs.io now uses the Kotlin Toolchain [...] ## Compose Multiplatform 1.12.0 Released DevFeed: [Compose Multiplatform 1.12.0 Released]() Original publisher: [Read original article]() Author: Elvira Mustafina Published: 2026-08-26T13:28:41Z Content type: release Language: en Sources: [Kotlin : A concise multiplatform language developed by JetBrains | The JetBrains Blog]() Topics: [multiplatform](), [compose-hot-reload](), [MCP Server](), [Model Context Protocol](), [releases](), [Web](), [compose-for-desktop](), [Font]() Tags: [compose-for-desktop](), [compose-for-web](), [compose-hot-reload](), [compose-multiplatform](), [fonts](), [mcp](), [mcp-server](), [model-context-protocol](), [multiplatform](), [releases](), [ui](), [web]() ### AI overview Compose Multiplatform 1.12.0 introduces an experimental MCP server for Compose Hot Reload, enabling AI coding agents to reload applications, inspect rendered UI and semantic trees, simulate interactions, and read logs. The release also adds automatic web font fallback and a more flexible desktop window and dialog API. ### Source excerpt Compose Multiplatform 1.12.0 is out! This version brings new tooling for AI assistants, improvements to web resource management, and finer control over desktop window states. Here are the highlights of this release: For a complete overview of the changes, check out What's new in Compose Multiplatform 1.12.0 or the release notes on GitHub. Get Started [...] ## Signatures, be true: domain errors and functional handling in Kotlin DevFeed: [Signatures, be true: domain errors and functional handling in Kotlin]() Original publisher: [Read original article]() Author: Alina Dolgikh Published: 2026-08-19T15:52:05Z Content type: article Language: en Sources: [Kotlin : A concise multiplatform language developed by JetBrains | The JetBrains Blog]() Topics: [Kotlin](), [Code](), [Exception](), [API](), [Database](), [engineering-culture]() Tags: [api](), [article](), [backend](), [code](), [database](), [engineering-culture](), [exception](), [how-to](), [kotlin]() ### AI overview An article about making expected domain failures explicit in Kotlin function signatures through sealed types and functional error handling. It argues that business-logic failures should be visible in the function signature, API contract, and client handling code rather than hidden in implementations or exception handlers. ### Source excerpt Here's a function that signs a document: In Kotlin, Unit means the function completes without returning a meaningful value - roughly equivalent to void in Java. Got it? Now, tell me what could go wrong. You can't. Yet, the code might be invalid. The signing window might have closed. The database might be down. The [...] ## Klibs.io Grows to 4,200+ KMP Projects With Smarter Discovery and New AI Integrations DevFeed: [Klibs.io Grows to 4,200+ KMP Projects With Smarter Discovery and New AI Integrations]() Original publisher: [Read original article]() Author: Daria Voronina Published: 2026-08-17T13:12:57Z Content type: article Language: en Sources: [Kotlin : A concise multiplatform language developed by JetBrains | The JetBrains Blog]() Topics: [AI-assisted coding]() Tags: [agents](), [ai-development](), [evaluation](), [kotlin](), [kotlin-multiplatform-libraries](), [llms](), [mcp](), [mcp-server](), [multiplatform](), [news]() ### AI overview Klibs.io has expanded its Kotlin Multiplatform library catalog and adds AI integrations through an MCP server. Coding agents can search projects by platform and retrieve current package-version data, while an expert skill supports library discovery and comparison. ### Source excerpt Explore a growing Kotlin Multiplatform catalog in your browser, or bring up-to-date library data directly into your AI development workflow through the klibs.io MCP server. When we introduced klibs.io in December 2024, the goal was simple: make it easier to find a Kotlin Multiplatform library that fits both your use case and target platforms. Since [...] ## Exploring Compose HTML for Server Side Rendering DevFeed: [Exploring Compose HTML for Server Side Rendering]() Original publisher: [Read original article]() Author: Frederik Pietzko Published: 2026-08-14T12:15:09Z Content type: article Language: en Sources: [Kotlin : A concise multiplatform language developed by JetBrains | The JetBrains Blog]() Topics: [Compose](), [Server-side rendering](), [Web Development](), [Kotlin](), [multiplatform](), [HTML](), [React](), [Next.js](), [Nuxt.js](), [Svelte]() Tags: [backend](), [compose](), [compose-multiplatform](), [development](), [framework](), [html](), [kotlin](), [multiplatform](), [news](), [react](), [server](), [svelte](), [ui](), [vue](), [web](), [web-development]() ### AI overview An exploratory proposal for extending Compose HTML with a JVM target to support server-side rendering. It argues that Kotlin and Compose components could provide type-safe, reusable server-rendered UI without a separate templating language, while discussing the trade-offs of canvas-based web rendering for SEO, loading times, and accessibility. ### Source excerpt Something is happening in server-rendered web development. React shipped Server Components. HTMX made "hypermedia" cool again. Phoenix LiveView proved a server can push interactive UI updates without a client framework in sight. Every ecosystem seems to be rediscovering the server as a place to render UI, except one: the JVM. What if Compose, the UI [...] ## When Escape Routes Become Toll Roads: Mapping How Developers Move Between Programming Languages DevFeed: [When Escape Routes Become Toll Roads: Mapping How Developers Move Between Programming Languages]() Original publisher: [Read original article]() Author: Vladimir Volokhonsky Published: 2026-08-12T16:15:18Z Content type: article Language: en Sources: [Kotlin : A concise multiplatform language developed by JetBrains | The JetBrains Blog]() Topics: [migration]() Tags: [articles-2](), [deveco](), [developers](), [kotlin](), [mapping](), [migration](), [programming](), [research]() ### AI overview A survey-based article on how developers move between programming languages. Project requirements are the main switching driver, while Kotlin stands out for its development experience and modern features. ### Source excerpt TL;DR: This post relates findings about language migration from the 2025 State of Developer Ecosystem survey. In general, project requirements are still the most common reasons for switching languages. One outlier from this trend, however, is Kotlin. People switch to Kotlin not because they have to; they switch because it simply feels better to work [...] ## Kodee's Kotlin Roundup: Birthday Wishes, Shipaton 2026, and the New Kotlin AI Benchmark DevFeed: [Kodee's Kotlin Roundup: Birthday Wishes, Shipaton 2026, and the New Kotlin AI Benchmark]() Original publisher: [Read original article]() Author: Kodee Published: 2026-08-04T08:14:27Z Content type: article Language: en Sources: [Kotlin : A concise multiplatform language developed by JetBrains | The JetBrains Blog]() Topics: [Kotlin](), [AI-assisted coding](), [Benchmark](), [multiplatform](), [Artificial Intelligence](), [App]() Tags: [ai-coding](), [app](), [benchmark](), [developers](), [kotlin](), [kotlin-roundup](), [multiplatform](), [news]() ### AI overview A Kotlin roundup covering Kotlin's 15th anniversary, a public benchmark for AI coding agents, Kotlin's availability in BlueJ, the 2.4.10 release, and RevenueCat Shipaton 2026, where developers can build a Kotlin Multiplatform app. ### Source excerpt Hi everyone! July gave me plenty to celebrate: Kotlin turned 15, got its first public benchmark for AI coding agents, became available in BlueJ, and shipped its 2.4.10 release. Developers can also demonstrate their skills at RevenueCat Shipaton 2026 by building a Kotlin Multiplatform app and competing for the Ship Kotlin Everywhere Award. Meanwhile, X [...] ## Know Kotlin? Ship It Everywhere and Win at Shipaton 2026 DevFeed: [Know Kotlin? Ship It Everywhere and Win at Shipaton 2026]() Original publisher: [Read original article]() Author: Ekaterina Petrova Published: 2026-07-31T13:49:33Z Content type: article Language: en Sources: [Kotlin : A concise multiplatform language developed by JetBrains | The JetBrains Blog]() Topics: [App](), [iOS](), [IntelliJ IDEA]() Tags: [android](), [app](), [compose-multiplatform](), [cross-platform](), [hackathon](), [intellij-idea](), [ios](), [junie](), [kotlin](), [multiplatform](), [news]() ### AI overview JetBrains promotes its Ship Kotlin Everywhere Award at RevenueCat Shipaton 2026, inviting developers to build a new Kotlin Multiplatform app for multiple platforms. The article outlines prizes, participant resources, and a prior participant's experience sharing code across Android and iOS. ### Source excerpt Somewhere in your notes there's an app idea waiting for a free weekend that never comes. Consider this its official deadline: RevenueCat Shipaton 2026, the world's biggest mobile hackathon, runs August 1 to September 30. If you know Kotlin, that idea is closer to the App Store than you think. Join the Shipaton The Ship [...] ## Qodana 2026.2: More Security, Better Coverage, Less Configuration DevFeed: [Qodana 2026.2: More Security, Better Coverage, Less Configuration]() Original publisher: [Read original article]() Author: Kerry Beetge Published: 2026-07-29T13:47:03Z Content type: release Language: en Sources: [Kotlin : A concise multiplatform language developed by JetBrains | The JetBrains Blog]() Topics: [Security, Privacy and Abuse Prevention](), [Pull Request](), [configuration](), [Cryptography](), [PHP](), [.NET](), [Go Language]() Tags: [2026-2](), [code-quality](), [compliance](), [cryptography](), [ide](), [laravel](), [pull-request](), [release](), [security]() ### AI overview Qodana 2026.2 adds pull-request coverage insights, automatic coverage-report detection, and expanded security and compliance checks. ### Source excerpt Qodana 2026.2 makes it easier for development teams to act on code quality, security, and compliance findings throughout the development workflow. This release introduces clearer code coverage insights for pull requests, highlights uncovered new lines directly in the IDE, and automatically detects coverage reports in common project locations - reducing the configuration required to get [...] ## Secure Your APIs: OAuth2 and JWT for Beginners DevFeed: [Secure Your APIs: OAuth2 and JWT for Beginners]() Original publisher: [Read original article]() Author: Alina Dolgikh Published: 2026-07-29T11:28:21Z Content type: tutorial Language: en Sources: [Kotlin : A concise multiplatform language developed by JetBrains | The JetBrains Blog]() Topics: [API](), [JSON Web Tokens](), [OAuth 2.0](), [Authorization](), [Authentication](), [backend-development](), [Security]() Tags: [apis](), [architecture](), [authentication](), [backend](), [kotlin](), [news](), [oauth](), [policy](), [spring](), [spring-boot](), [tokens](), [tutorial](), [tutorials]() ### AI overview This beginner tutorial explains how OAuth 2.0 and JSON Web Tokens (JWT) work together to secure APIs and Spring Boot backends. It distinguishes authentication from authorization, describes delegated access and token validation, and outlines how a resource server verifies bearer-token signatures, checks expiration, and enforces scopes and roles. ### Source excerpt This tutorial was written by an external contributor. APIs are frequent targets for bad actors since they expose data and functionality. Securing them while maintaining usability is often one of the most challenging and time-consuming parts of API development. OAuth 2.0 and JSON Web Tokens (JWT) help make these processes more manageable and reliable. They [...] ## KotlinLLM is Going Open Source DevFeed: [KotlinLLM is Going Open Source]() Original publisher: [Read original article]() Author: Anastasia Birillo Published: 2026-07-28T07:50:41Z Content type: article Language: en Sources: [Kotlin : A concise multiplatform language developed by JetBrains | The JetBrains Blog]() Topics: [kotlinllm](), [Kotlin](), [Open Source](), [IntelliJ IDEA](), [Large Language Model](), [Code generation](), [AI-assisted coding](), [Software Engineering]() Tags: [code-completion](), [code-generation](), [engineering](), [intellij](), [intellij-idea](), [kotlin](), [kotlinllm](), [llm](), [llms](), [open-source](), [plugin](), [research](), [research-prototype](), [software](), [software-engineering]() ### AI overview KotlinLLM is an open-source research prototype and IntelliJ IDEA plugin for Kotlin/JVM projects. It introduces Smart macros whose generated Kotlin source evolves from runtime scenarios, allowing applications to delegate selected logic to an LLM without calling the model on every request or relying on a separate runtime agent. ### Source excerpt TL;DR KotlinLLM is now public. It's a research prototype for delegating runtime logic to an LLM from Kotlin code. Instead of calling an LLM on every request or running a separate agent, you can write an explicit Kotlin call. Its body is generated Kotlin source code, and that code is updated as your application hits [...]