SyncLangs is an open-source code generation tool designed to centralize and synchronize type definitions across multiple programming languages. syln schema file and then generate idiomatic, type-safe code for TypeScript, Python, Go, Rust, Java, C++, and C. This approach ensures that all codebases share the exact same data shapes, eliminating the need for hand-written adapters or manual synchronization and reducing the risk of inconsistencies.
The platform operates as a build-time generator, requiring no runtime agents or services. syln schema. With a single command, SyncLangs generates code for all seven supported languages, formatted in a way that matches each language's conventions. The generated output is deterministic and diff-friendly, making it easy to review changes in version control systems. SyncLangs also provides a command to check for drift in continuous integration pipelines, failing builds if generated code diverges from the schema, thereby enforcing consistency before changes reach the main branch.
SyncLangs is delivered as a command-line interface (CLI) tool, installable via shell script or pip. It is MIT licensed and free to use for generating code in all supported languages, with no limits on schemas or targets. The open-source version includes unlimited schemas, CI drift checks, configuration options, and custom naming. For teams that require advanced collaboration, paid tiers offer a hosted schema registry, versioned schema history, breaking-change diffs in pull requests, and priority support. Enterprise options include self-hosted registries, single sign-on, audit logs, custom language targets, and compliance features.
The tool is aimed at developers and teams working across multiple programming languages who need to maintain consistent data contracts without manual overhead. SyncLangs positions itself as a solution for keeping type definitions in sync across diverse technology stacks, with a focus on preventing drift and ensuring that generated code remains idiomatic and maintainable in every target language.
synclangs is a Frameworks & SDKs product. It focuses on synchronizing type definitions between different programming languages to reduce duplication and errors. It is built as a B2B product for software developers working with multi-language codebases. synclangs is a paid product. It runs on the web and the command line.
synclangs first shipped in 2026. Key capabilities include type sharing, code generation, and typeScript support.
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