Linux & DevOps Tools — Free Online Tools for Developers and Sysadmins

Visual Linux file permission calculator. Convert between symbolic and numeric notation.

Build cron jobs visually. Preview next execution times.

Convert between symbolic (rwx) and numeric (755) file permissions.

One-click SSH key setup scripts. Device-aware commands for macOS, Linux, and Windows.

Build ~/.ssh/config visually. Manage hosts, keys, and tunnels.

Generate Nginx configs for reverse proxy, SSL, redirects, and more.

Create systemd service files visually. Configure units, services, and install sections.

Generate firewall rules for UFW and iptables. Build rules visually.

Searchable, categorized Linux command reference. Find any command instantly.

Copy-paste ready shell scripts for common sysadmin and DevOps tasks.

Interactive keyboard shortcut reference for Vim and Nano editors.

apt vs yum vs dnf vs pacman vs apk — side-by-side command comparison.

Paste df -h or du output and get a visual chart of disk usage.

Understand /proc fields, nice values, signals, and process states.

Comprehensive Linux server security checklist with actionable steps.

Paste top/htop/vmstat output and get performance recommendations.

Calculate IP ranges, CIDR notation, network and broadcast addresses.

Build Dockerfiles visually. Pick base image, packages, ports, and commands.

Build Kubernetes deployments, services, and ingress configs visually.

Pick cloud provider and resource type to generate HCL/Terraform code.

Estimate cloud infrastructure costs across AWS, GCP, and Azure.

Encode and decode Base64 strings instantly.

Convert between JSON, YAML, and TOML formats seamlessly.

Test regular expressions with real-time match highlighting.

Pick what you want to do and get the right git command. Visual git helper.

Check SSL certificate details, expiry dates, and chain information.

Generate RFC 4122 compliant UUIDs (v1, v3, v4, v5) in bulk. Runs locally.

Convert JSON secrets (AWS Secrets Manager, Vault, GCP) to .env format. Flatten nested objects, set prefixes, and download.

Decode, verify, and generate JSON Web Tokens. Inspect header, payload, and verify HMAC signatures.

DNS lookup, WHOIS, port checker, reverse DNS, and more. Essential networking utilities.

Generate strong random passwords and passphrases. Crypto-secure, runs locally.