Online Session Timeout Simulator
Use our free session timeout simulator to test idle session limits, token expiration, and auth workflows directly in your browser. Start simulating now.
About Session Timeout Simulator
The Session Timeout Simulator allows developers, security testers, and QA engineers to model user inactivity, token lifecycles, and session expiration behavior directly in the browser. It helps verify how web applications handle idle users, modal warnings, and post-logout redirects without waiting through long real-world expiration timers.
Test auth state management, evaluate custom idle duration thresholds, and inspect event triggers in real time. Because the simulation executes entirely on your device, you can safely test session logic without installing software or creating an account.
Key features
- Configurable idle and absolute session timeout durations
- Visual countdown timer with pause and reset controls
- Customizable pre-timeout warning modals and alert triggers
- Simulated user activity tracking for mouse and keyboard events
- Real-time event logging for auth state transitions
- Completely client-side execution with zero external data transfer
How to use Session Timeout Simulator
- Set your preferred idle timeout and warning lead times.
- Choose whether to track simulated user activity like clicks or keypresses.
- Click Start to initiate the session countdown timer.
- Observe warning triggers, timeout alerts, and logged authentication state changes.
- Reset the timer or adjust thresholds to test different session scenarios.
Who is it for?
- Web developers testing session warning dialogs before production deployment.
- QA engineers validating idle logout logic across varying time limits.
- Security analysts demonstrating session fixation and inactivity timeout risks.
- Compliance teams verifying idle logout controls for PCI DSS or HIPAA standards.
Frequently asked questions
What is a session timeout simulator?
It is a browser-based testing utility that models how user sessions decay over time, helping you observe inactivity warnings, token expiration, and logout behaviors under custom time constraints.
Why should I simulate session timeouts instead of waiting for real ones?
Simulating timeouts allows you to accelerate countdowns to just seconds or minutes, saving time during QA testing and ensuring warning modals fire reliably before final session termination.
Does this tool require installing software or sending data to a server?
No. The simulation runs entirely inside your browser using client-side JavaScript, ensuring your configuration and testing data remain private on your device.
How does idle timeout differ from absolute timeout?
An idle timeout triggers only after a specific period of user inactivity, whereas an absolute timeout terminates the session after a fixed elapsed time regardless of user activity.
Can I test warning notifications prior to session expiry?
Yes, you can configure a custom warning threshold to verify how user interface prompts, such as stay-logged-in modals, behave before the full timeout occurs.