Developer tools that never leave your machine.

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Cron library

Common schedules as their own pages — useful when you search for “cron every 5 minutes” and want the expression, not a thread.

• every minute* * * * *
• every 5 minutes*/5 * * * *
• every 10 minutes*/10 * * * *
• every 15 minutes*/15 * * * *
• every 30 minutes*/30 * * * *
• every hour0 * * * *
• every 2 hours0 */2 * * *
• every 6 hours0 */6 * * *
• every 12 hours0 */12 * * *
• every day at midnight0 0 * * *
• every day at noon0 12 * * *
• every day at 9:000 9 * * *
• every weekday at midnight0 0 * * 1-5
• weekdays at 09:000 9 * * 1-5
• every weekend at midnight0 0 * * 0,6
• every Monday at midnight0 0 * * 1
• every Sunday at midnight0 0 * * 0
• the first day of every month0 0 1 * *

Regex library

High-traffic patterns with a live tester. Each page says what the pattern will not do, on purpose.

• Email address^[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,}$
• HTTP URLhttps?:\/\/[^\s/$.?#].[^\s]*
• IPv4 address^(?:(?:25[0-5]|2[0-4]\d|1?\d?\d)\.){3}(?:25[0-5]|2[0-4]\d|1?\d?\d)$
• IPv6 address^(?:[A-Fa-f0-9]{1,4}:){7}[A-Fa-f0-9]{1,4}$
• UUID^[0-9a-f]{8}-[0-9a-f]{4}-[1-8][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$
• Hex color^#(?:[0-9a-fA-F]{3}|[0-9a-fA-F]{6})$
• ISO date^\d{4}-\d{2}-\d{2}$
• US phone number^(?:\+1[-.\s]?)?(?:\(?[2-9]\d{2}\)?[-.\s]?)[2-9]\d{2}[-.\s]?\d{4}$
• US ZIP code^\d{5}(?:-\d{4})?$
• Username^[A-Za-z][A-Za-z0-9_]{2,15}$
• URL slug^[a-z0-9]+(?:-[a-z0-9]+)*$
• HTML tag<\/?[A-Za-z][A-Za-z0-9]*(?:\s[^<>]*)?>
• MAC address^(?:[0-9A-Fa-f]{2}[:-]){5}[0-9A-Fa-f]{2}$
• Domain name^(?:[A-Za-z0-9](?:[A-Za-z0-9-]{0,61}[A-Za-z0-9])?\.)+[A-Za-z]{2,}$
• Hexadecimal^(?:0x)?[0-9A-Fa-f]+$
• JWT^[A-Za-z0-9_-]+\.[A-Za-z0-9_-]+\.[A-Za-z0-9_-]*$