Semver Version Tool
⑤ Build / Package
What it is: Semver is the versioning scheme like 1.2.3. Check whether a version is valid or satisfies a range like ^1.0.0.
When to use: When reading package.json dependency ranges, or confirming a version matches.
Compare two versions
Everything runs locally in your browser — nothing is uploaded.
FAQ
What is the difference between ^1.2.3 and ~1.2.3?
^1.2.3 allows upgrades up to <2.0.0 (no major bump); ~1.2.3 only allows up to <1.3.0 (no minor bump). Test which versions satisfy a range in the range box above.