What it is

The tools I use most as a DevOps engineer

K8s Manifest Generator

CIDR / Subnet Calculator

Secret Scanner

Log Formatter

Dockerfile Linter

Other tools

How it's built

Why client-side matters 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. 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. 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. Enter a CIDR block like 10.0.0.0/24 and instantly see the network address, broadcast, first/last host, total IPs, and usable hosts. Has a binary visualizer showing which bits are network vs host, and an IP-in-range checker.

Essential for VPC planning. Paste any text — code, config, logs — and it scans for 20+ credential patterns: AWS access keys, GitHub tokens, GCP service account keys, Azure connection strings, Stripe keys, Discord tokens, and more. All regex, all client-side. Paste JSON logs and it parses them into a structured view with level badges, timestamps, and expandable JSON payloads. Filter by error/warn/info/debug, search across lines, and scroll horizontally for long lines. You can also upload a .log file directly. Checks 12 best-practice rules: pinned base images, no apt-get without --no-install-recommends, COPY over ADD, non-root USER, and more. JSON Formatter (Monaco editor), JWT Decoder, YAML Validator, ENV Parser, Diff Checker, Markdown Preview, Cron Builder, Git Command Builder, Base64/URL Encoder, UUID Generator, Timestamp Converter, Port Reference, HTTP Headers inspector. The secret scanner is just a list of compiled regexes run against the input on every keystroke. The K8s generator is a form that builds a YAML string — no server, no templating engine. When you paste a JWT into a tool, you're potentially exposing: When you paste a .env file, you're potentially exposing every secret your app uses. Running these tools in the browser means the data never travels over a network. There's nothing to intercept, nothing to log. Live: devstool.vercel.app Would love feedback — especially on what DevOps tools you'd want added next. Templates let you quickly answer FAQs or store snippets for re-use. what tool do you reach for most? as well , this person and/or - Next.js 15 App Router, fully static except the HTTP Headers proxy- Tailwind CSS v4- Monaco Editor (via CDN to avoid Turbopack worker bundling issues)- ⌘K command palette for jumping between tools instantly- Shareable links — tool state is base64url-encoded in the URL, no server involved - The algorithm and signing key hint- User IDs, roles, and permissions encoded in the payload- Token expiry (useful for timing attacks) - Location Pune, MH- Joined Mar 5, 2025