Free Online Linux & DevOps Tools — Chmod Calculator, Cron Generator, Subnet Calculator, Regex Tester, JWT Decoder and 36+ More
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linux · 16 tools
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.
cloud & devops · 9 tools
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.
Browser-measured round-trip latency to every AWS region. DynamoDB healthcheck endpoints, live parallel testing.
Browser-measured round-trip latency to Google Cloud regions. BigQuery regional endpoints, live parallel testing.
utilities · 11 tools
Convert between JSON, YAML, and TOML formats seamlessly.
Pick what you want to do and get the right git command. Visual git helper.
Check SSL certificate details, expiry dates, and chain information.
Build a Certificate Signing Request and private key in your browser, or copy the openssl command. RSA + ECDSA, SANs, fully client-side.
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.
Built by engineers, for engineers.
Free forever. Every tool runs locally, remembers your inputs across refreshes, and works offline once loaded. Pin your favorites, hit ⌘K, get back to work.
read the manifesto// why linuxtools.app
Most online developer tools send your data to a server, require sign-ups, or are buried under ads. LinuxTools.app is different — every tool runs locally in your browser using client-side JavaScript. Your data never leaves your machine.
// who it's for
Built for Linux sysadmins, DevOps engineers, cloud architects, and developers who need quick access to calculators, generators, and converters without the noise. From chmod to Kubernetes YAML — one place, zero friction.
// how it works
Pick a tool, use it, copy the output. Everything is instant because there's no server round-trip. Forms remember your input across refreshes. Pin your favorites for quick access. Press ⌘K to search.