Validators

SemVer Validator

Validate semantic version numbers such as 1.2.3, prerelease versions, and build metadata directly in your browser.

SemVer Validator

Validate semantic version numbers such as 1.2.3, prerelease versions, and build metadata directly in your browser.

This tool runs in your browser. Your input is processed locally and is not uploaded.

About this Tool

Use this free SemVer Validator to check whether a semantic version number is formatted correctly. It can help detect invalid major, minor, or patch numbers, malformed prerelease labels, broken build metadata, unsupported characters, and common versioning mistakes. The validation runs directly in your browser.

Examples

1.0.0
2.1.3-beta.1+build.45

Frequently Asked Questions

What does this SemVer validator check?

It checks whether a version string follows semantic versioning rules, including major, minor, patch, prerelease, and build metadata parts.

Does this compare version numbers?

The main purpose is validation, but the tool may also show parsed version parts to make the result easier to understand.

Is my version string uploaded?

No. The validation is designed to run locally in your browser.

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