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

After a teammate accidentally pasted production AWS credentials into an online JSON formatter, the author built DevsTool — a collection of 19 developer/DevOps utilities that run entirely in the browser with no backend or data collection. Key tools include a K8s Manifest Generator, CIDR/Subnet Calculator, Secret Scanner, Log Formatter, and Dockerfile Linter, all built with Next.js 15 and Tailwind CSS v4. The client-side-only approach ensures sensitive data like JWTs and .env files never leave the user's machine.