Start with the notes
Plain-English notes for each topic, checked against current standards rather than copied from a textbook.
Free cybersecurity revision,
with hands-on practice.
Master concepts through structured learning, then solidify them with practical, hands-on challenges designed for real-world application. Every course is certified, with a verifiable certificate awarded upon completion.
OWASP·NIST·MITRE ATT&CK
Why hands-on
Most revision asks you to recognise the right answer. Keeping it takes more than that, so the work here keeps pushing you to pull an answer from memory and then use it on something real.
Four layers.
One way.
What sits under every topic, from the first read to proof you can show.
Drill it in
Flashcards and quizzes turn a first read into something you can recall under pressure, with an explanation on every answer.
Put it to work
Hands-on challenges are there for a reason. Use your brain and don't just do the bare minimum. If you want to truly understand the material, you need to engage with it actively.
Prove it
Each module ends with a practical exam, and passing it earns a certificate you can actually show.
Why hands-on
Four ways Hands-on pays off.
01
Recall beats rereading.
A week after studying, the students in Roediger and Karpicke's experiment who had tested themselves recalled 61% of a passage; the ones who simply read it again held on to 40%. Every topic ends by making you retrieve the answer rather than skim another recap.
02
Practice raises the score.
Across 225 studies in science and engineering, learners who worked through the material scored higher and failed far less often than those sitting through lectures. The challenges drop you into the real artefact: a token to forge, an auth log to pick apart.
03
Feedback while it's fresh.
Answers are checked the instant you submit, so you find out whether your reasoning held up while it is still in your head. There is nothing to install and no wait for a mark.
04
Progress you can prove.
Each module finishes with a hands-on exam rather than another box to tick, and passing it earns a certificate. You come away with something concrete to show and a clear read on which topics you have genuinely got down.
The research behind this: a week-on recall gain for testing over rereading in Roediger & Karpicke (2006), and higher marks with fewer failures across 225 studies in Freeman et al. (2014).
Everything here is free, with no account needed to start.
10topics
40chapters
19challenges
84glossary terms
Topics
Ten topics, start anywhere.
Where to work
Five ways to lock in.
Common questions
Questions, answered.
How can I revise cybersecurity for free?
Cyber Revision is a free cybersecurity revision site. Work through the notes, flashcards and quizzes for each topic, then test yourself on hands-on challenges. There is no paywall and nothing to install.
Where can I practice cybersecurity skills online?
Every challenge here is hands-on and graded instantly with SHA-256, no account needed to try. You can practice real skills like decoding tokens, cracking ciphers and reading logs, with no VM or VPN to set up.
Is there a free cybersecurity course with a certificate?
Yes. The course runs module by module, and passing a module's exam earns a free certificate. Every module is unlocked from the start, so you can begin with whichever topic you need.
Why do the exams offer hints?
Getting stuck should not be where you give up. This is a revision website for a reason, not an exam which punishes you. Each task has a couple of hints you open in order, and a third on the ones that need a calculation or a specific command. The first points you at the technique or tool being tested, the next at the method, and none of them hand you the answer. Opening a hint does not affect whether you pass. That is on purpose: working on a real task in the real world with a nudge from google when you need one is how people actually progress, not remembering terms, so you come away able to do it yourself next time.
Is the cybersecurity content up to date?
Yes. It is checked against current standards: OWASP Top 10:2025, NIST CSF 2.0 and MITRE ATT&CK v19.
Who is Cyber Revision for?
Anyone revising cybersecurity: students, career changers, and people brushing up before an interview or a certification such as CompTIA Security+.
Start now
Pick a topic and get hands-on.
It is all free and there is nothing to install. Learn the module, then put your money where your mouth is on auto-graded challenges.