Semver Comparator

Compare semantic version numbers to determine which is newer, older, or equal

Semver Comparator — Compare Semantic Version Numbers to Determine Which Is Newer, Older, or Equal with Full Pre-Release and Build Metadata Support

  1. Enter two semantic version numbers in the input fields using the format MAJOR.MINOR.PATCH (e.g., 1.2.3 and 2.0.0). Semantic Versioning (SemVer) is the de facto standard for software versioning — it gives meaning to version numbers through a strict three-part scheme: MAJOR version increments when you make incompatible API changes (breaking changes), MINOR version increments when you add backward-compatible functionality, and PATCH version increments when you make backward-compatible bug fixes. Understanding how versions compare is essential for dependency management, API compatibility checking, and automated release pipelines.
  2. The tool automatically compares the two versions component by component according to the SemVer 2.0.0 specification precedence rules. The comparison logic: (1) Precedence is determined by the first difference when comparing MAJOR, MINOR, and PATCH numerically from left to right — 2.0.0 > 1.9.9 because MAJOR 2 > 1. (2) When MAJOR, MINOR, and PATCH are equal, a pre-release version (one with a hyphen suffix like 1.0.0-alpha) has LOWER precedence than the normal version (1.0.0) — this means 1.0.0 is 'newer' than 1.0.0-beta. (3) Pre-release identifiers are compared numerically (if both are numbers) or lexically (if both are strings) — 1.0.0-alpha.1 1.0.0-alpha.2 1.0.0-beta. (4) Build metadata (the + suffix, e.g., 1.0.0+build.123) is IGNORED when determining version precedence.
  3. Read the result: the tool displays which version is newer (>), which is older (equal (=). The comparison result is color-coded for instant readability — green for one version being newer, gray for equal. Use the Semver Comparator to: check if a dependency update is safe (does the new version change the MAJOR number? If so, expect breaking changes), verify that your package.json version ranges are correct (does ^1.2.3 actually resolve to the expected version?), debug CI/CD pipelines where version comparison logic determines deployment actions, and teach junior developers how semantic versioning works through interactive comparison. All comparison happens locally in your browser — your version strings, which may reveal internal release schedules, never leave your device.

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