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ONEFREEPLACEDeveloper Tools · SemVer Lab

SemVer 2.0.0 + npm-style range lab

Compare releases without guessing.

Strict semantic-version precedence, prerelease rules, build-metadata equality, npm-style ranges, batch sorting, release planning and explainable results — entirely in your browser.

BigInt-safePrerelease awareBuild metadata awarenpm-style rangesLocal only

Compare two versions

Version A

Version B

Why this result?

npm-style range evaluator

Range expression

Version to test

Candidate matrix

Versions — spaces, commas or new lines

Sort and audit a release list

Versions — one per line or comma separated

Release planner

Current version

Prerelease label

New prerelease starts from

Planned version

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Dependency-window suggestions

Current analysis report