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Semver Checker (Version Range Tester)

Check if a version satisfies an npm semver range (^, ~, x, >=, ||), compare versions and get the next version.

Runs instantly in your browser — results update as you type.

What does ^ mean in package.json?

In npm, ^1.2.3 allows any version from 1.2.3 up to (but not including) 2.0.0 — new features and fixes, but no breaking major release. ~1.2.3 allows only patch updates below 1.3.0. Enter a version and a range to see if it matches and how the range expands.

Range cheat sheet

RangeMeans
^1.2.3>=1.2.3 <2.0.0
^0.2.3>=0.2.3 <0.3.0
~1.2.3>=1.2.3 <1.3.0
1.2.x>=1.2.0 <1.3.0
1.0.0 - 2.0.0>=1.0.0 <=2.0.0

Frequently asked questions

Do pre-releases match ranges?

Only if the range itself contains a pre-release of the same version, as npm does.

What is semantic versioning?

MAJOR.MINOR.PATCH: breaking changes, new features, bug fixes.

Is it free?

Yes.