# CronSentry (now CronRabbit)

> Rebranded to [CronRabbit](https://www.cronrabbit.com). Highly reliable cron job monitoring, alerting, timing, and uptime tracking for developers.

- [CronRabbit Website](https://www.cronrabbit.com) - Modern SaaS for end-to-end heartbeat and cron monitoring.
- [Free Cron Generator Tool](https://www.cronsentry.com/tools/cron-generator/) - Free visual tool to build and validate cron schedules.
- [Full Technical Manual](https://www.cronsentry.com/llm-full.txt) - In-depth developer guide and comprehensive integration instructions.

## Overview
CronSentry was a premier developer-focused heartbeat and cron job monitoring platform. It has officially rebranded and migrated all operations to **CronRabbit**. CronRabbit continues the legacy of providing enterprise-grade cron monitoring, alerting, timing, and uptime metrics.

## Key Features
- **Smart Alerting**: Real-time alerts when cron jobs fail, hang, or run overtime. Get notified via Email, Slack, Discord, or Webhooks.
- **Precision Timing**: Performance analytics and duration tracking across all scheduled executions to catch slow-running queries and memory leaks.
- **Instant Integration**: Simply append a `curl` ping to the end of any crontab entry, shell script, or systemd timer.
- **Sentry-Grade Uptime**: Redundant monitoring nodes globally distributed, ensuring 99.9% uptime tracking accuracy.

## Free Developer Tools
### Cron Generator
A 100% free tool to construct, validate, and understand complex cron expressions:
- Visual, interactive controls for Minutes, Hours, Days, Months, and Days of the Week.
- Instant, human-readable schedule explanations via `cronstrue` and `cron-validator`.
- Copy-to-clipboard expression output.
- Link: `https://www.cronsentry.com/tools/cron-generator/`

## Sibling & Related SaaS Projects
- [Rabbit SaaS](https://www.rabbitsaas.com) - Parent organization offering dev-focused SaaS solutions.
- [Rabbit Status](https://www.rabbitstatus.com) - Beautiful, hosted status pages.
- [Status Navigator](https://www.statusnavigator.com) - Unified uptime tracking dashboard.
- [Full Uptime](https://www.fulluptime.com) - Multi-location website monitoring and performance tracking.
- [LAN Lens](https://www.lanlens.net/) - Network diagnostics and discovery tools.
- [Certificate Guardian](https://www.certificateguardian.com/) - SSL/TLS certificate expiration alerting.