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Edit, run and share short Kotlin examples in a browser without first creating a full project.

Test Kotlin behavior with specification styles, assertions, and property-based checks.

Configure hosted CI/CD builds with build steps, triggers, and Kotlin DSL settings-as-code.

Build JVM and multiplatform applications with an open-source language and compiler toolchain.

Develop Java and Kotlin projects in JetBrains’ cross-platform integrated development environment.

Automate JVM and multi-language builds with a configurable task graph and reusable plugins.

A deterministic layer that lets agents make code changes across an entire code estate.

A contract-testing service for checking compatibility between API and microservice consumers and providers.

A visual and code-based automation tool for functional web and desktop testing, with API and load features in the Ultimate edition.

An Android UI testing framework for expressing screen actions and assertions in app tests.

Android and Kotlin development selected each week

Build, run, debug, test, and profile Android applications in Google’s Android-focused IDE.

Record, replay, and inspect UI tests for desktop, web, and mobile applications.

Manually inspect a website across real browser and device configurations, including private test sites.

Test your own web application with end-to-end, component, and API test workflows.

Build functional, security and performance tests for APIs, then automate the runs in CI.

Real-device testing for mobile, web, and streaming applications, with Appium and Selenium automation.

An end-to-end testing platform spanning web, mobile, performance, and real-device workflows.

Run gray-box end-to-end tests against React Native apps on iOS and Android.

Create and run browser, mobile, API, performance, and accessibility checks with a hosted test platform.

A Python load-testing framework that models user behavior in code and scales traffic across workers.

A Java-based load-testing application for exercising services and analyzing their performance under simulated traffic.

A desktop web-application testing toolkit that combines an intercepting proxy, manual tools, and automated vulnerability scans.

One JavaScript and TypeScript test runner for browser, mobile, desktop, and extension workflows.