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105 Free IT Tools/Sysadmin

Free Sysadmin & DevOps Tools

Cron expressions, nginx configs, Docker Compose, file permissions, and network references — the day-to-day utilities of server work, free in your browser.

9 free tools

755Chmod Calculator

Calculate Unix file permissions with a visual toggle — sanity-check the 777 your agent just chmod'd.

IPNetwork Tools

IP lookup, DNS resolver, and port scanner — all running client-side in your browser.

200HTTP Status Codes

Searchable reference for HTTP status codes — decode what your agent's API call actually returned, with common fixes.

📅Cron Visualizer

Visualize cron schedules on a timeline and calendar. See next 20 runs, frequency stats, click-to-build.

🐳Docker Compose

Build docker-compose.yml visually. Add services, ports, volumes, env vars. Template services. YAML output.

H:HTTP Header Explorer

Searchable HTTP header reference. Categories, examples, security header config generator.

▶NNginx Config Gen

Build nginx.conf visually. Server blocks, locations, proxy, SSL, caching. Templates and validation.

IPIP Address Info

View your public IP address. IPv4/IPv6 format validator. Approximate location info.

▶A.htaccess Gen

Build .htaccess rules visually. Redirects, rewrites, CORS, gzip, caching, error pages.

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