Semver Range Tester

Enter a semantic version and a range expression to check if the version satisfies the range. Supports npm/cargo syntax (^1.2.3, ~1.2.0, >=2.0.0, etc.) and Go module syntax (v1.2.3). The tool parses the version into its components (major, minor, patch, prerelease, build metadata) and evaluates the range expression to give a clear yes/no answer.

What it does

▸Parses semantic versions into major, minor, patch, prerelease, and build components
▸Tests versions against range expressions (^1.2.3, ~1.2.0, >=2.0.0, <3.0.0)
▸Supports npm/cargo caret (^) and tilde (~) ranges
▸Supports compound ranges (>=1.0.0 <2.0.0)
▸Supports Go module version syntax (v1.2.3)
▸Handles prerelease versions (1.0.0-beta.1) and build metadata (1.0.0+build.123)

Use cases

▸Checking if a package version satisfies a dependency range in package.json
▸Verifying that a version bump doesn't break a semver range constraint
▸Understanding what ^1.2.3 actually allows (>=1.2.3 <2.0.0)
▸Testing Go module version compatibility

How it works

Enter a semantic version (e.g., 1.4.2) in the version field

Enter a range expression (e.g., ^1.2.0) in the range field

The tool parses both and checks if the version satisfies the range

The result (satisfies / does not satisfy) is displayed with explanation

Frequently asked questions

1What does ^1.2.3 mean?

The caret (^) allows changes that don't modify the leftmost non-zero digit. ^1.2.3 allows >=1.2.3 <2.0.0 (any 1.x.x version >= 1.2.3). ^0.2.3 allows >=0.2.3 <0.3.0 (only 0.2.x). ^0.0.3 allows only 0.0.3. This is npm's default range.

2What does ~1.2.3 mean?

The tilde (~) allows patch-level changes if a minor version is specified. ~1.2.3 allows >=1.2.3 <1.3.0 (any 1.2.x version). ~1.2 allows >=1.2.0 <1.3.0. ~1 allows >=1.0.0 <2.0.0. This is more restrictive than the caret.

3Does it support Go module version syntax?

Yes. Go uses a v-prefixed version (v1.2.3) and has its own range semantics. The tool handles Go-style version strings and can test them against Go module pseudo-versions and tag constraints.