I got paranoid about online tools logging my secrets — so I built my own

A few months ago a teammate accidentally pasted production AWS credentials into an online JSON formatter. Nothing happened — but it could have. That moment stuck with me. How many times had I pasted a JWT, a .env file, or a Dockerfile into some random tool without thinking about it? Those sites are free because they can afford to be. Your data might be the product. So I stopped using them and built my own: DevsTool. What it is DevsTool is a collection of 19 developer and DevOps utilities that run entirely in your browser. No backend, no accounts, no data collection. The only thing that ever leaves your machine is the URL you're on. The tools I use most as a DevOps engineer K8s Manifest Generator Fill in a form — name, image, replicas, resource limits, env vars — and get a ready-to-apply Deployment + Service YAML. Handles ConfigMap, Ingress, and HPA too. No more copying boilerplate from Stack Overflow. CIDR / Subnet Calculator Enter a CIDR block like 10.0.0.0/24 and instantly see the ne