Cloudflare Workers Cron Triggers
Edge-scheduled serverless functions on Cloudflare
What is Cloudflare Workers Cron Triggers?
Cloudflare Workers Cron Triggers allow you to run serverless functions on a schedule using Cloudflare's global edge network. You write a Worker script (JavaScript or TypeScript) with a scheduled event handler and configure cron triggers in the wrangler.toml file. When the schedule fires, Cloudflare executes your Worker on its edge infrastructure without any origin server involvement.
Cron Triggers support standard cron expressions and run in Cloudflare's V8 isolate runtime, which provides fast cold starts (under 5ms) and global distribution. Workers have access to Cloudflare's ecosystem including KV (key-value storage), R2 (object storage), D1 (SQLite database), and Durable Objects. The free tier includes limited cron triggers, with paid plans offering more triggers and higher execution limits.
Best For
- Lightweight scheduled tasks that can run as serverless functions
- Global edge execution where low latency from multiple regions matters
- Teams already using Cloudflare Workers for their application logic
- Simple scheduled tasks like cache purging, data fetching, or notification sending
Limitations
- Cloudflare-only — your scheduled code must run as a Cloudflare Worker
- Workers have execution time limits (10ms CPU on free, 30s on paid)
- Cannot trigger external HTTP endpoints directly — the code runs inside the Worker
- Limited to three cron triggers per Worker on the free plan
Cloudflare Workers Cron Triggers vs CronJobPro
Cloudflare Workers Cron Triggers are ideal when your scheduled logic can run entirely within a Worker, but they cannot trigger external HTTP endpoints — the code must execute inside Cloudflare's runtime. CronJobPro is designed specifically for triggering any HTTP endpoint on any server, making it the better choice when your scheduled task involves calling your own backend, API, or webhook URL.
Official Website
https://developers.cloudflare.com/workers/configuration/cron-triggers/Frequently Asked Questions
What is Cloudflare Workers Cron Triggers?
Cloudflare Workers Cron Triggers allow you to run serverless functions on a schedule using Cloudflare's global edge network. You write a Worker script (JavaScript or TypeScript) with a scheduled event handler and configure cron triggers in the wrangler.toml file. When the schedule fires, Cloudflare executes your Worker on its edge infrastructure without any origin server involvement.
What is Cloudflare Workers Cron Triggers best for?
Lightweight scheduled tasks that can run as serverless functions. Global edge execution where low latency from multiple regions matters. Teams already using Cloudflare Workers for their application logic. Simple scheduled tasks like cache purging, data fetching, or notification sending.
How does Cloudflare Workers Cron Triggers compare to an external cron service?
Cloudflare Workers Cron Triggers are ideal when your scheduled logic can run entirely within a Worker, but they cannot trigger external HTTP endpoints — the code must execute inside Cloudflare's runtime. CronJobPro is designed specifically for triggering any HTTP endpoint on any server, making it the better choice when your scheduled task involves calling your own backend, API, or webhook URL.
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