Caffeine v1.64

billon on 26 Sep 2017

Caffeine prevents an automatic screensaver or going into standby/sleep/hibernate, useful for presentations or playing video. It works by simulating a keypress once every 59 seconds, so your PC thinks you're still working at the keyboard. Double-clicking the program icon "empties" the coffee pot and temporarily disables the program, while doing this a second time re-enables it.

Other command-line arguments for more functions are present on the web site.

System Requirements: WinXP / Vista / Win7 / Win8 / Win10
Writes settings to: None
License: Freeware
How to extract: Download the ZIP package and extract to a folder of your choice. Launch caffeine.exe.
What's new?
  • Option for old icons added, 'cos not everyone likes the new ones.

16 comments on Caffeine  The Portable Freeware Collection Latest Entries Feed

belg4mit 2006-08-27 17:26

wtf? change your screen saver or power settings if you want to waster energy, which run yet another resource sucking program to do it?

idk 2007-01-18 06:42

If you use computers that you are not logged into this can be useful to keep the pc from going into a screensaver that requires a password to unlock it. Some admins won't allow users to change power settings or screen saver settings.

Fox Cole 2007-08-22 08:27

It's also useful while monitoring long-running processes (such as downloads, or report generation, or large PDF creation) that can be interrupted if the computer enters standby or hibernate mode.

aslmx 2008-03-03 05:12

@belg4mit: when working in a company which IT Department doesnt give you the right to change the screensaver/power settinsg but forces you to use a damn fucking screensaver that needs hundred of megs of Memory you need caffeine... very helpful!

Crid - Los Angeles 2010-04-08 22:51

I adore this utility for the contexts aslmx describes.

I love this thing. I love it like crazy. I wrote the author and said so. He said "Yeah, thanks".... I don't think he understands how grateful I am for having skipped about 3,000 redundant logins over the last few years.

Harm 2010-07-21 13:21

This trick doesn't work for me. Apparently my adminstrator has done something "smart" in forcing the screensaver every 10 minutes, so even with the program running, I still get into screensave mode. Some tips?

matnet 2010-07-27 14:57

Harm, try the "Don't Sleep" app its somewhat similar to this app.

Harm 2010-07-29 19:45

@matnet: thanks, but that doesn't work either....

PinoyAko 2010-12-15 17:11

belg4mit -- WTF ? before you say something... think about it first... have you ever worked in an Enterprise company? ... how many employees do you have?...

Anyway, Thanks for this tool.. very helpful. :)

Ralph 2011-03-25 18:02

Version 1.5 Now out Nov2010


webfork 2011-03-25 18:55

Updated, thanks Ralph.


Napiophelios 2012-12-18 23:27

I wonder if this would work with World of Warcraft to keep me logged in while I sleep? :)


brentmel 2013-05-24 21:30

helping computers stay awake so people can sleep since 2009


triode 2014-05-01 14:52

@Napiophelios: Likely won't work for WoW or any other network game produced after about 1999, because they look for game activity (positions and actions and other more clever things) for determining idle players, which has nothing to do with your computer sleeping or screensaving. Pressing F15 (which is what I assume this program does once per 59 seconds) has nothing to do with gameplay so it won't reset any idle timer on the server side.


smaragdus 2016-02-07 11:57

Caffeine 1.61 has been released, changes in the latest version:
v1.61 - 10th October 15
Fixed bug with app not going active/inactive correctly when a timed period elapsed


Checker 2016-02-07 21:14

@smaragdus: Thanks ... and updated ;)


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