OmToolkit is a curated collection of free, browser-based tools for developers, DevOps engineers, network professionals, and security teams. Every tool runs entirely in your browser — your data never leaves your device.
We believe engineering teams deserve high-quality tools without barriers. No sign-ups, no rate limits, no data collection. OmToolkit exists to eliminate the friction between having a problem and solving it — whether that's formatting JSON at 2 AM, debugging DNS propagation, or validating a cron expression before deploying to production.
We build tools we use ourselves, and we ship them the moment they're useful — not when they're perfect. Every tool is designed for the real workflows of working engineers.
Frontend, backend, fullstack — format, convert, validate, and generate data instantly.
Cron scheduling, DNS checks, certificate validation, infrastructure debugging.
IP subnetting, CIDR calculations, traceroute analysis, DNS propagation.
SSL/TLS inspection, email authentication analysis, domain intelligence.
Client-side processing. No server round-trips. Results appear as you type.
Your input never leaves your browser. Zero telemetry on tool usage data.
No accounts, no API keys, no paywalls. Open a URL and start working.
Proper validation, edge-case handling, and accurate output you can trust.
Each tool solves one problem well. No bloat, no feature creep.
Tool ideas come from real engineers. Report issues or suggest tools anytime.