Built a free browser tool to visualise cron overlaps, check SSL expiry, and audit Docker Compose — no signup, nothing leaves your browser
After getting burned by two cron jobs silently colliding in production
(no error, just a hung process and a missed backup), I built ConfigClarity
to catch these problems before they happen.
It runs entirely in your browser — nothing leaves your machine.
**Three tools in one:**
**Cron Builder & Visualiser**
- Paste your crontab -l output and see a timeline of every job
- Overlaps flagged with exact times and counts
- Server Load Warning when 3+ jobs fire in the same minute
- Or build expressions from scratch with dropdowns + plain English translation
- Supports /u/reboot, env vars, comments
**SSL Checker**
- Paste a list of domains, get expiry dates and days remaining
- Color coded: green / orange (<30 days) / red (<7 days)
- Export as PNG for a quick audit report
**Docker Auditor**
- Paste your compose file + optional .env
- Flags: missing healthchecks, hardcoded secrets, port collisions, 0.0.0.0 bindings
No signup. No backend. No tracking.
All processing happens entirely in your browser — your crontab and configs never leave your machine.
Live at: https://configclarity.dev/
Would love feedback — especially from anyone running 10+ cron jobs or
complex compose stacks where this kind of thing actually bites you.
Happy to add features the community actually needs.
Posted Mar 6, 2026, 8:41 PM UTC