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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