node-cron
Lightweight cron expression scheduler for Node.js
What is node-cron?
node-cron is a lightweight Node.js package that lets you schedule functions using standard cron expressions. It runs entirely in-process, parsing cron expressions and executing callbacks when the schedule matches the current time. The library supports five-field and six-field (with seconds) cron expressions, timezone configuration, and the ability to start, stop, and destroy scheduled tasks programmatically.
With zero external dependencies beyond Node.js itself, node-cron is the simplest way to add cron-like scheduling to a Node.js application. It is commonly used for periodic cleanup tasks, cache invalidation, health checks, and data synchronization within Express, Fastify, or NestJS applications. The API is minimal — you call cron.schedule() with an expression and a callback.
Best For
- Simple periodic tasks within an existing Node.js application
- Lightweight scheduling without external infrastructure requirements
- Development and prototyping where quick setup matters
- In-process tasks like cache clearing, health pings, or periodic data fetches
Limitations
- Runs in a single Node.js process — if the process dies, all schedules stop
- No persistence — schedules exist only in memory and are lost on restart
- No built-in job queue, retry logic, or failure handling
- Cannot distribute jobs across multiple servers
node-cron vs CronJobPro
node-cron is ideal for simple in-process scheduling within a Node.js app, but it provides no reliability guarantees. If your Node.js process crashes or restarts, scheduled jobs are lost until the process restarts. CronJobPro runs independently of your application, so even if your server goes down, CronJobPro detects the failure and alerts you. For any task where reliability matters, an external scheduler is the safer choice.
Official Website
https://www.npmjs.com/package/node-cronFrequently Asked Questions
What is node-cron?
node-cron is a lightweight Node.js package that lets you schedule functions using standard cron expressions. It runs entirely in-process, parsing cron expressions and executing callbacks when the schedule matches the current time. The library supports five-field and six-field (with seconds) cron expressions, timezone configuration, and the ability to start, stop, and destroy scheduled tasks programmatically.
What is node-cron best for?
Simple periodic tasks within an existing Node.js application. Lightweight scheduling without external infrastructure requirements. Development and prototyping where quick setup matters. In-process tasks like cache clearing, health pings, or periodic data fetches.
How does node-cron compare to an external cron service?
node-cron is ideal for simple in-process scheduling within a Node.js app, but it provides no reliability guarantees. If your Node.js process crashes or restarts, scheduled jobs are lost until the process restarts. CronJobPro runs independently of your application, so even if your server goes down, CronJobPro detects the failure and alerts you. For any task where reliability matters, an external scheduler is the safer choice.
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