Cron expression parser — next fire times & plain English

Decode any cron expression into the next 10 fire times and a human description.

Cron syntax is concise but unforgiving — a stray asterisk and your job runs every minute instead of every day. This parser takes a 5-field (POSIX) or 6-field (with seconds, à la Quartz) expression and returns a plain-English description ('At 02:30 on Monday'), the next ten scheduled fire times in your local timezone, and a quick-reference table for ranges, steps, and named values like @daily. Useful for verifying a Kubernetes CronJob, a node-cron string, a Vercel cron, or anything else that takes the same syntax. Runs entirely in your browser with no network calls.