Preview Cron

Trigger & test your Vercel cron jobs locally or on preview deployments

Configuration

Sent as x-vercel-protection-bypass. Vercel protects previews by default — find this token in your project's Deployment Protection settings.

For protected cron endpoints — same header Vercel sends in production (Bearer $CRON_SECRET).

Nothing is saved: your configuration and tokens stay in memory and are gone when you close the tab.

About

A developer tool designed to test and trigger cron jobs for Vercel deployments in non-production environments.

Since Vercel only executes cron jobs in production, this tool enables you to:

  • Test cron endpoints on preview deployments
  • Manually trigger scheduled tasks for testing
  • Monitor execution time and response status

For localhost testing, run npx previewcron in your project — no install needed.

Privacy: Nothing is stored — your configuration and tokens live in memory and disappear when you close the tab. Trigger requests are relayed through our proxy to reach your preview URL, never stored or logged server-side.

This is an independent tool and is not affiliated with, endorsed by, or sponsored by Vercel Inc.

No cron jobs loaded

Paste your vercel.json and preview URL to get started