Semantic Version Validator

About this calculator

Semantic Versioning 2.0.0 (semver.org) is the widely adopted spec — used by npm, Cargo, Composer, and most modern package registries — for structuring version numbers as MAJOR.MINOR.PATCH, where major increments signal breaking changes, minor increments add backward-compatible features, and patch increments are backward-compatible fixes, optionally extended with a hyphenated pre-release tag (like -beta.1) and a plus-prefixed build metadata tag (like +20130313144700).

This tool checks whether a pasted version string is valid under the SemVer 2.0.0 grammar and, if so, breaks it into its major, minor, patch, pre-release, and build components. Software developers publishing packages, CI/CD pipeline maintainers validating release tags, and package registry tooling authors use it to catch malformed version strings before they cause a broken publish or a dependency-resolution failure.