Caffeine Pro is a powerful Microsoft Windows™ software designed to prevent your computer from going into sleep mode by simulating a keypress event at regular intervals. Whether you are watching a movie, giving a presentation, or simply need your computer to stay alert, Caffeine Pro has got you covered.

Say goodbye to interrupted downloads, paused videos, or missed notifications due to inactivity. With Caffeine Pro running in the background, you can stay focused on your tasks without worrying about your computer going idle.

Download Caffeine Pro today and experience uninterrupted productivity like never before!

License

Caffeine Pro is released as an FREE / Open Source software under MIT License documented here. 

Download

Latest Version: v1.1.669

Windows Setup: Caffeine.Pro.1.1.670.Setup.msi

Windows Portable: Caffeine.Pro.1.1.670.Portable.zip

Source Code: Github Repository

 Features

• Keeps Windows Awake: by simulating a key press every 59 seconds. This is enough to trick the system into thinking that the user is still active, so it doesn’t go to sleep. This method also prevents programs to detect user inactivity.
• Screen Saver Allowed: In this mode, instead of a keypress simulation, a special thread state is used to keep Windows awake, but this method does not prevent programs to detect user inactivity.
• Singleton Instance: Only one instance of the application is allowed in memory. When starting a new instance, it detects the already running application and automatically exits; however, any command-line option that is passed to the second instance, is sent to the first instance through a names pipeline.
• Support Dark/Light themes: It uses Microsoft Fluent UI and supports both light and dark themes. Screenshot Screenshot

• Auto Start With Windows: The program can be set to start automatically with Window.
• Actions after Deactivation: After the set time, program can make Windows session: Exit, Lock, Sign Out, Hibernate, Sleep, Shutdown, Force Shutdown, Restart, Force Restart.
• Deactivate on Battery: The program can be set to deactivate when the computer is running on battery.
• Deactivate on CPU Idle: The program can be set to deactivate when the CPU is below a certain percentage.
• Stay Active When Locked: The program by default deactivates when locked. NOTE: When program is started, it becomes active (indefinitely) by default. If you want to start it inactive, you can use the command-line option -startinactive.

Feature Request

Use our feedback form to request a feature, report a bug, or send us any other feedback or concern about Caffeine Pro:

Singleton Instance

Only one instance of the application is allowed in memory. When starting a new instance, it detects the already running application and automatically exists; however, any option that is passed to the second instance, is sent to the first instance through a names pipeline.

This method allows controlling the program through command-line. For example to instruct the program to exit, this command can be executed:

"Caffeine Pro.exe" exit

Command Line Usage

CaffeinePro.exe [Command] [options]

NOTE: If another instance of Caffeine Pro is already running all the command line commands and options are sent to that instance.

Commands:

activate	activate
activeforX	activate for X min
activeuntilX	activate until X (X=hh:mmpp, e.g. 5:24PM)
deactivate	deactivate **
exit	exits the instance **

Options:

-help	Show help
-resetoptions	Reset all options to false **
-startinactive	starts inactive
-allowss	allow screen saver. No mouse/key sim
-cpuX	deactivate when CPU below X% *
-activewhenlocked	stay activate when computer is locked *
-deactivateonbattery	deactivate when on battery *
-noicon	Do not show the icon in system tray

*: When deactivated, it it will stay inactive until manually activated again.

**: specifically designed for controlling existing instance in memory.