35–50 minutes
Debug JSON and API Data
Learn a repeatable workflow to format, validate, compare, and convert JSON or API data with practical browser-based exercises and checkpoints.
5 practical steps
Beginner
Practical IT learning paths
Each path connects several working tools into one realistic workflow. Follow the exercises in order, check your understanding, and keep your progress in this browser—no account required.
6 guided paths
30 hands-on steps
Free and self-paced
40–55 minutes
Passwords, Hashes, and Tokens
This passwords, hashes, and tokens path explains what secure generation, password hashing, checksums, and JWT inspection solve—and what they do not.
5 practical steps
Beginner to intermediate
45–60 minutes
DNS and Network Troubleshooting
Use this DNS and network troubleshooting path to move from a domain-name symptom to records, address ownership, ports, and subnet boundaries.
5 practical steps
Beginner to intermediate
35–50 minutes
Build a Useful Incident Runbook
Turn an ambiguous incident into a timed, testable runbook with safe commands, comparisons, and clear handoff notes for responders.
5 practical steps
Intermediate
30–45 minutes
Prepare Images for the Web
Prepare images for the web by resizing, compressing, converting, and packaging one image while checking each trade-off.
5 practical steps
Beginner
30–45 minutes
Work Safely with Time and Schedules
Connect Unix timestamps, time zones, date intervals, and cron schedules without the usual off-by-one surprises.
5 practical steps
Beginner to intermediate
Start with Debug JSON and API Data when an API payload will not parse, or use DNS and Network Troubleshooting to move from a domain symptom to records, addresses, ports, and subnet boundaries.
Security practice continues in Passwords, Hashes, and Tokens. Operational work is covered by Build a Useful Incident Runbook, Prepare Images for the Web, and Work Safely with Time and Schedules.
What makes these paths useful?
A concrete outcome
Every path starts with a job you may actually need to do, not a list of disconnected definitions.
Safe practice data
Exercises use disposable examples and remind you when sensitive production data does not belong in a tool.
A visible checkpoint
Each step ends with something you can verify before you move on, so progress means more than opening a page.
Need one tool right now?
The full tool directory is organized by task and works without a required account. If you know the subject but not the exact utility, start with the IT tool categories.
Browse all 55 tools