klibs.io

What It Is

klibs.io is a search platform and directory for Kotlin Multiplatform (KMP) libraries. The current page title indicates that users can explore 3700+ KMP projects. Its core value is not in building, publishing, or hosting code, but in aggregating KMP-related information scattered across public sources such as Maven Central and GitHub, helping developers assess whether a library is suitable for Android, iOS, JVM, JS, WASM, and other multiplatform projects.

Core Capabilities and Ecosystem

The platform automatically discovers and indexes eligible projects: a project must be open source and hosted on GitHub; at least one artifact must be published to Maven Central; at least one artifact must be multiplatform and include kotlin-tooling-metadata.json; and the POM must contain a valid GitHub repository link. New versions of indexed projects typically appear the day after they are published to Maven Central. klibs.io also provides an OSS Health score, calculated based on commit consistency over the past 12 weeks, issue responsiveness, PR management, and author diversity, to help measure maintenance activity and sustainability.

Pricing and Openness

The source text does not mention any fees, subscriptions, or commercial editions, so based on the available information it can be regarded as publicly free to use. It is worth noting that while the indexed libraries are open-source projects, it is not stated whether the klibs.io platform itself is open source. It is also not a license proxy or compliance tool; users must still comply with the license terms of each library when using them in practice.

Pros and Cons

Its strengths are its highly focused positioning, making it well suited for KMP technology selection; its indexing criteria and OSS Health calculation method are relatively transparent; it is maintained by the JetBrains Kotlin Websites team, which gives it strong ecosystem credibility; and it supports issue feedback via GitHub issues and Kotlin Slack. Its limitations are that it currently focuses on GitHub, while GitLab and Bitbucket are not yet indexed; Gradle plugins and Java/JVM-only packages are only future plans; and the source text does not show API, SDK, or self-hosting capabilities. The platform may use AI to supplement incomplete metadata, but library content is not used to train or fine-tune models. Even so, relevant metadata should still be manually verified.

Who It Is For and Access from China

It is suitable for KMP developers, cross-platform mobile teams, technical leads, and maintainers of KMP open-source libraries, for discovering libraries, conducting an initial assessment of maintenance quality, and troubleshooting indexing issues. The source text does not specify accessibility from China, so it should be considered unknown. In actual use, it may depend on external services such as GitHub, Maven Central, and Kotlin Slack, so teams should test network accessibility themselves. Alternative or complementary tools include Maven Central, GitHub Search, official Kotlin samples, and, in the future, the Gradle Plugin Portal for plugin-related scenarios.