Become a manual tester who finds the bugs others miss.
Free, hands-on tutorials for aspiring manual testers: testing fundamentals, interactive UI components, mobile and web testing, test cases and interview prep.
Free · No sign-up · Made for complete beginners
Continue where you left off73
Lessons
35
Component guides
396
Glossary terms
122
Interview questions
Your roadmap
From zero to job-ready in six steps
Follow the path in order, or jump straight to what you need. Every lesson builds on plain-English explanations.
- 1
Learn the basics
What testing is, the vocabulary, and how teams build software.
0 of 16 - 2
Know the UI
Every component you will ever test, and how it breaks.
0 of 35 - 3
Test real features
Login, checkout, notifications and other everyday flows.
0 of 16 - 4
Go mobile & web
Devices, gestures, browsers, DevTools and networks.
0 of 12 - 5
Do the work
Write test cases and bug reports like a pro.
0 of 14 - 6
Land the job
How hiring works, take-home tasks, your CV, and 90+ interview questions.
0 of 6
Final step · Capstone project
Test a whole release, start to finish
Read the brief, write a test plan and test cases, then hunt for 24 hidden bugs in the FoodDash 2.0 app. Finish with a go / no-go report and get a printable certificate. About 2–2½ hours.
UI components
Don't just read about components. Break them.
Each guide shows real iOS, Android and web designs, explains when they make sense, lists the bugs testers find most often, and gives you a deliberately broken version to investigate.
- Live, tappable demos of every variant
- When to use it, and when not to
- A bug hunt with hidden defects
- Copy-ready checklists and test cases
Bites
Got 2 minutes? Scroll and learn.
A feed of 10-second cards: flashcards, quick quizzes, spot-the-bug and this-or-that. It previews what's next on your path and keeps bringing back what you've finished, right when you're about to forget it.
Open BitesEverything in one place
Explore the library
Testing Fundamentals
What testing is, how it fits into software development, and the core vocabulary every tester uses.
UI Components
Interactive guides to the building blocks of every app: designs, when to use them, common bugs and how to test them.
Features & Flows
Real product features like login, checkout and push notifications, with test scenarios and edge cases.
Mobile Testing
Everything specific to phones and tablets: gestures, interruptions, networks, devices and tools.
Web Testing
Browsers, responsive layouts, DevTools, cookies, accessibility and the basics of API testing.
Tutorials
Step-by-step lessons on the daily work of a tester, each with a quick and a detailed version.
QA Career
Get your first QA job: how hiring works, take-home assignments, a CV and portfolio without experience, and where ISTQB fits.
Glossary
Every testing term explained in plain English, with real examples.
Interview Prep
Common QA interview questions with model answers, what interviewers look for, and flashcards.
Ten minutes or thirty? You choose.
Tutorials come in a Quick version for a fast refresher and a Detailed version with worked examples, quizzes and checklists. Hover any underlined term to see what it means.
Learn to write test cases