How the pattern works
| Part | Meaning |
|---|---|
(0|[1-9]\d*) | Major, minor and patch (groups 1–3): numbers without leading zeros |
\. | Dots between them |
(?:-([0-9A-Za-z.-]+))? | Optional pre-release after a hyphen (group 4): beta.1, rc.2 |
(?:\+([0-9A-Za-z.-]+))? | Optional build metadata after a plus (group 5) |
Code examples
JavaScript
const re = /^(0|[1-9]\d*)\.(0|[1-9]\d*)\.(0|[1-9]\d*)(?:-([0-9A-Za-z.-]+))?(?:\+([0-9A-Za-z.-]+))?$/;
re.test(value); // true or falsePython
import re
bool(re.fullmatch(r'(0|[1-9]\d*)\.(0|[1-9]\d*)\.(0|[1-9]\d*)(?:-([0-9A-Za-z.-]+))?(?:\+([0-9A-Za-z.-]+))?', value))PHP
preg_match('/^(0|[1-9]\d*)\.(0|[1-9]\d*)\.(0|[1-9]\d*)(?:-([0-9A-Za-z.-]+))?(?:\+([0-9A-Za-z.-]+))?$/', $value) === 1;Notes and limitations
A practical version of the semver 2.0 rules; strip a leading v first if your tags use one. Compare versions numerically, group by group, not as strings.
Regex TesterType a pattern and watch matches highlight live in your test text.
Open the tool Frequently asked questions
What is the regex for semantic version (semver)?
/^(0|[1-9]\d*)\.(0|[1-9]\d*)\.(0|[1-9]\d*)(?:-([0-9A-Za-z.-]+))?(?:\+([0-9A-Za-z.-]+))?$/ — it matches the whole string. See the table above for what each part does.
Which examples match?
Of the examples tested, these match: 1.0.0, 2.10.3-beta.1, 1.0.0+build.5, 0.1.0-rc.1+sha.5114f85. The others don’t.
How do I test this regex?
Click “Open in Regex Tester” — the pattern, flags and sample text load automatically, and matches highlight as you edit.