I've been a DevOps engineer for a few years and I kept noticing the same pattern. I'd be writing a Kubernetes CronJob and have three tabs open: one for cron syntax, one to check what's different in Kubernetes vs Linux, and another to validate it. For CIDR subnetting I'd reach for the same calculator every time. JWT debugging meant heading to jwt.io. Nothing wrong with any of those tools, I just wanted them in one place built specifically for the way engineers actually work.
So I spent a few weekends building opsbash.com.
The tool I'm most proud of is the cron builder. The problem it solves is that AWS EventBridge, GitHub Actions and Kubernetes all have slightly different cron syntax from standard Linux crontab. EventBridge adds a year field and requires a ? wildcard. GitHub Actions schedules run in UTC only and have a minimum 5-minute interval. Kubernetes has its own edge cases. The builder handles all four formats in one place and shows you exactly what changes when you switch between them. There's a visual dropdown editor, next-run preview, and a plain English description of what the expression does.
The rest of the tools are things I was tired of Googling: A CIDR calculator that shows subnet mask, broadcast address and the full host range with a visual bit map. A JWT decoder that runs entirely in your browser so the token never leaves your machine. A JSON to YAML converter built for people constantly moving between API responses and Kubernetes configs. A chmod calculator so I stop second-guessing file permissions. A gitignore generator. A Docker Run to Compose converter.
Everything is client-side. No accounts, no tracking, no ads. The whole thing is free.
I'm planning to add more tools based on what engineers actually need. If there's something you keep reaching for a separate tab to do, I'd genuinely like to hear it.
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