Cronlight: a dashboard for Quartz.NET that drops into your existing ASP.NET Core app (open source, MIT)

Mahesh K — Fri, 30 Oct 2026 01:30:36 +0000

I've run Quartz.NET jobs for years, and for most of that time I waited for someone to ship a proper dashboard. Eventually I stopped waiting and built the one I wanted. By the time I got serious, the official dashboard had already shipped - but it's Blazor, and Blazor and I never got along. So I kept going, and it became Cronlight: a plain web UI served as static files, with no Blazor or per-user server connection.

Full disclosure: a lot of this was built with AI tools. I drove the design, reviewed the code, argued with the model plenty, and it has unit and end-to-end tests running in CI. I'm not going to pretend I typed it all myself.

It drops into the ASP.NET Core app that already runs your scheduler - your scheduler, no connection string or schema of its own, never a second scheduler behind your back.

What it does:

Browse, create, and edit jobs (cron, one-time, interval) with the schedule in plain words and next fire times as you type, in any time zone. Pause or resume a job, a group, or everything; run now, run once with different data, cancel a run in flight.
Typed forms for your job types via attributes, with required and secret parameters - secrets stay out of the database as configuration references.
Execution history (optional package): every run's outcome, error, and log, including a running job's log so far, plus misfires, late starts, success rates, and P95 durations, stored in the Quartz database on SQL Server, PostgreSQL, MySQL, or SQLite.
Retries, alerts (Slack, Teams, webhook, email), JSON/YAML export and import with a preview of what will change, audit log, OpenTelemetry metrics, health check, OpenAPI, and several schedulers in one app with per-scheduler permissions.
An MCP server, plus an "AI mode" where you ask "which jobs failed overnight, and why?" in the dashboard, answered by your app's own model with read-only tools.

Try it in your browser, no sign-up: https://cronlight.pages.dev/demo/

Needs .NET 10 and Quartz.NET 3.13.1+ (any job store). It's pre-1.0, so a minor version can still change options and endpoints.

Docs: https://cronlight.pages.dev/docs/

Tell me what's missing for your setup - clustered schedulers, auth setups, job stores I haven't tested, or UI friction.

DEV Community: Mahesh K

Cronlight: a dashboard for Quartz.NET that drops into your existing ASP.NET Core app (open source, MIT)