Validate a SemVer version string

Check a version string against Semantic Versioning 2.0.0 components.

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ToolSemVer Validator
Input
Output
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How it works

The value is matched as MAJOR.MINOR.PATCH with optional dot-separated pre-release identifiers and plus-separated build metadata. Numeric core components cannot contain leading zeroes; a leading v is accepted before the SemVer core.

  • Three numeric components make precedence predictable.
  • Pre-release and build sections remain optional.

Worked example

Stable Release
Validate a standard semantic version
Input
											2.4.1
Output
												Valid SemVer: 2.4.1
Major: 2
Minor: 4
Patch: 1

When to use this

Package manifests, release tags, and CI publish checks validate versions.

Edge cases

  • 01.2.3 is rejected for a leading numeric zero.
  • Build metadata does not affect precedence.
  • A numeric pre-release identifier cannot begin with zero.

References