Sharpen your instinct.

Today’s Ozzle
Which log looks suspicious?
Select one log, then click Submit. You have 3 chances.
🧪 Ozzle Test Mode
Visible only when the page is opened with ?test=1. Test data is isolated from normal player progress.

Which log looks suspicious?
Select one log, then click Submit. You have 3 chances.
Visible only when the page is opened with ?test=1. Test data is isolated from normal player progress.
Every day includes two separate case files.
Standard and Hell Mode keep separate play state, so solving one does not reveal or complete the other.
Owlthera is a fictional medicine and research company where owls somehow became very good at science and slightly less good at cybersecurity.
Its researchers, clinicians, engineers, and cloud teams work across labs, offices, production systems, and research environments. Unfortunately, suspicious logins, strange processes, risky configuration changes, and the occasional cyber intruder keep finding their way into the nest.
That’s where you come in. Each Ozzle puts you in the role of an analyst protecting Owlthera by spotting the event that doesn’t belong.
Owlthera and all people, systems, incidents, domains, and organizations featured in Ozzle are fictional and created for cybersecurity education.
Install Ozzle for one-tap access, the new magnifying-glass app icon, and a more app-like experience.
Ozzle can alert you when a fresh daily puzzle is available.
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Background delivery depends on browser support. Reliable alerts while Ozzle is completely closed require Web Push from the production server.
Build your Ozzle achievements through streaks and cybersecurity skill milestones. Once earned, an achievement stays unlocked in this browser.
No account required. Achievements are stored locally on this device/browser for now. Tap an unlocked achievement to share it.