Open source website monitor

Know when websites change.
Before anyone else does.

Automated screenshot monitoring with pixel-level diff detection, flexible scheduling, and instant notifications. Built for developers and teams.

Everything you need to track changes

Visual Monitoring

Full-page screenshots with pixel-level diff detection. See exactly what changed and where.

Smart Diff Viewer

Side-by-side comparison with highlighted change regions. Red pixels = changed content.

Flexible Scheduling

Cron-based scheduling from every 15 minutes to weekly. Full custom cron support.

Dual Notifications

Email alerts via Resend or SMTP, plus in-app notification center with unread badges.

XPath & JSON API

Monitor specific DOM elements via XPath or track JSON API values for precise change detection.

Ignore Regions

Mark dynamic areas like ads or timestamps to ignore, reducing false positives.

Built with

Next.js 15Better AuthPrismaPostgreSQLBullMQRedisPlaywrightpixelmatchResendUploadThingAWS S3Turborepo

Ready to start monitoring?

Set up your first monitor in under 2 minutes.