Running on your device · 0 bytes uploaded

# Developer tools

Regex, cron, semver, and glob — paste, run, see the answer. Computed entirely in your browser.

- [Regex tester

Test a regular expression against your own text — the browser’s own engine, in a disposable worker.
](/dev/regex-tester)
- [Cron explainer

Explain a cron schedule in plain English and list its next fire times, dialect and timezone explicit.
](/dev/cron)
- [Semver compare

Sort versions, compare two, and match ranges — strict SemVer 2.0.0, coercion shown separately.
](/dev/semver)
- [Glob tester

Test glob patterns against a list of paths — picomatch in a bounded worker, dialect explicit.
](/dev/glob-tester)

4 tool s · everything is computed locally, nothing leaves your device.

---

Canonical HTML: https://nutter.tools/dev
Markdown version: https://nutter.tools/dev/index.md
Plain-text version: https://nutter.tools/dev/index.txt
Agent index: https://nutter.tools/llms.txt