Why does Chrome randomly change zoom between 25% and 400%?

Amanda Nagle-Chicoine March 13, 2013
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This happens constantly on Google Chrome (yes, I have cleared cache, etc.): While reading an article or browsing on Chrome, the settings change (I have it set at 100% default) but the font will get so tiny I can’t see it and then zoom to 400%- I am constantly going to Google “Settings” to switch it back to 100%. I’ve run a scan for viruses- so it is not that either. Any ideas are appreciated! (Actually I just bought a Sony Windows 8 computer (which I am returning) but I noticed it on that too. As far as Windows 8 and that computer, it could be lack of knowledge when using the touch pad (it’s not a touch screen)- However on this computer I have had it almost a year and this issue started about 2 months ago. Thank you!

  1. internaciulo
    July 19, 2013 at 9:47 am


    this also happens to me since a few weeks/months on my macbook pro

    My guess is that a new "clever" shortcut that does the same as "Ctrl +" and "Ctr -" was added in a recent version of chrome.

    This is very annoying.

    Thanks to anybody who can help removing this "feature"


  2. EL
    March 18, 2013 at 6:21 am

    Does your touchpad do two-finger zoom? Mine gets like that sometimes. You might want to consider disabling the touchpad temporarily, and seeing if that fixes the issue. If it does, maybe you can find out where to disable that feature, or just be more careful not to lean on the touchpad, or just use a real mouse.

  3. Joel Thomas
    March 17, 2013 at 1:05 pm

    Try chrome in incognito mode which disables all the extensions or try google chrome support

  4. Pat Cook
    March 16, 2013 at 9:12 am

    First, of all if your computer has only been doing this for 2 months or so, I would go to system restore and choose a restore point which is before you ever started having the zoom go crazy on you. If this fixes that problem, which hopefully it will, then try the following tips to see if maybe the steps you are using for zoom, are not quite correct.

    If you only want to zoom in or out on a single webpage you are viewing, you could use the keyboard shortcuts Ctrl and + to zoom in or Ctrl and - to zoom out.

    If you want the zoom to effect every webpage you visit, you go to wrench icon> options>under the hood. In the web content section, us the Font size to adjust the text size. If you want everything bigger including images and videos, use page zoom to adjust the size of everything on your web pages.

    I hope this helps. Personally I think Chrome needs to rethink their zooms options and give more zoom choices than they currently offer.

  5. Alan Wade
    March 14, 2013 at 8:27 am

    Try this app:
    http://www.softpedia.com/get/System/OS-Enhancements/AlwaysMouseWheel.shtml it is designed for another perpose but stops the zooming in Chrome.

  6. 1hegame
    March 14, 2013 at 5:39 am

    First thing you should do is disable all extensions and then see. Search for 'extensions manager' on Chrome Web Store to make things easy or disable them manually. If no issue arises again then may be an extension is causing problem. You can then enable extensions one by one.

    Also you can try a new profile. Go to chrome://settings/ and click on 'Add new user'. If that happens again in this new profile then you have to reinstall chrome.

  7. Jim Chambers
    March 14, 2013 at 3:09 am

    Do a malware scan with Malwarebytes free edition with up to date definitions, Since your Win 8 laptop has same symptom, a flashdrive you used with both could be infected, so scan it to

  8. Mike
    March 14, 2013 at 1:21 am

    Zoom levels in Chrome are stored on a per domain basis (to my knowledge). If you zoom in to 400% and don't revert it will remember that setting whenever you visit the domain.

    If it appears to be "random" my first guess would be accidental use of a shortkey. For example pressing CTRL and scrolling with the mouse will change the zoom level instead of scrolling the page. There might be other shortkeys too through some extensions or the software/settings for your touchpad e.g. multi-touch zoom.

  9. ha14
    March 13, 2013 at 10:17 pm

    on google chrome address bar type: chrome://chrome/settings/fonts
    in the new window tweak your font settings

    see if extensions are causing this
    disable them one by one

    Change text, image, and video sizes (zoom)



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