Tools
Free tools for DevOps engineers and SysAdmins. Everything runs in your browser — no sign-up, nothing uploaded.
Terminal
Generators
Databases
SQL Playground
Run real SQL in your browser on PostgreSQL 18 or SQLite 3, with sample databases. SELECT, JOIN, CREATE, ALTER, GRANT — the real engine, nothing simulated.
⇄SQL Dialect Reference
The same operation in PostgreSQL, MySQL, MariaDB, SQL Server, Oracle and SQLite, side by side — checked syntax with version notes.
Calculators
Tools
Coming soon
Being built now. Missing a tool you need? Tell us at contact@ohsudo.com.
Guided Terminal Lessons
Step-by-step Linux challenges in the browser terminal, with automatic checking and saved progress.
Dockerfile Generator
Multi-stage Dockerfiles for Node, Python, Go and Java, running as a non-root user.
Kubernetes Manifest Generator
Deployment, Service, Ingress, ConfigMap, Secret and autoscaling YAML from a form.
CI/CD Pipeline Generator
GitHub Actions and GitLab CI pipelines: build, test, push images and deploy.
Nginx Config Generator
Reverse proxy, TLS, redirects, caching and security headers for Nginx.
systemd Unit Generator
Service and timer units with restart policies, users and hardening options.
SSH Config Generator
A tidy ~/.ssh/config with hosts, keys and jump hosts.
.gitignore & .dockerignore Generator
Ignore files for your stack, in one click.
SQL Exercises
Practice queries on real PostgreSQL with instant checking of your results.
YAML ↔ JSON Converter & Validator
Validate YAML and JSON and convert between them, with clear error messages.
Base64, URL & Hash Tool
Encode and decode Base64 and URLs, and calculate SHA hashes locally.
JWT Decoder
Inspect a JSON Web Token’s header, payload and expiry without sending it anywhere.
Unix Timestamp Converter
Epoch seconds and milliseconds to dates in any time zone, and back.
Port Lookup
What usually runs on port 5432, 6443 or 9090 — and what to check if it’s open.