Cron Expression Generator

Describe your schedule in plain English. Get a production-ready cron expression instantly.

Your key is stored locally in your browser only. Never sent anywhere except Groq.

How it Works

Three steps from English to production-ready cron.

Get a free Groq API key

Sign up at console.groq.com — it's free. Paste it into the key field above and click Save. It stays in your browser, never leaves your device.

Describe your schedule

Type anything in plain English — "every weekday at 9am", "first Monday of each month at 8pm", or paste an existing cron expression to decode it.

Copy your expression

CronSpeak generates platform-specific expressions for Linux, GitHub Actions, AWS EventBridge, Kubernetes, and Vercel — with next-run previews and gotcha warnings.

Example Expressions

Common schedules and their cron expressions across platforms.

Natural Language

"Every weekday at 9am"

0 9 * * 1-5

Runs Monday–Friday at 09:00. Safe for Linux crontab and GitHub Actions. GitHub Actions runs in UTC.

Natural Language

"First day of every month at midnight"

0 0 1 * *

Triggers at 00:00 on the 1st of each month. AWS EventBridge requires 0 0 1 * ? * with a year field.

Natural Language

"Every 15 minutes"

*/15 * * * *

Runs at :00, :15, :30, :45 every hour. Widely supported across all platforms. Vercel Free tier minimum is 1 hour.

Natural Language

"Every Sunday at noon"

0 12 * * 0

Fires at 12:00 PM every Sunday. GitHub Actions schedules may be delayed under heavy load.

About CronSpeak

Open-source, zero-dependency, privacy-first.

CronSpeak is a single HTML file — no backend, no tracking, no cookies. Your Groq API key never touches any server other than Groq's own API. The entire app runs in your browser. Powered by LLaMA 3.3 70B via Groq for near-instant inference.