JScreenFix is a Java applet and Java webstart application that helps re-energise stuck pixels and remove burn-in on LCD and plasma screens by randomly switching on and off red, green and blue colour cells very rapidly. A stuck pixel is a point on a screen that does not display the correct colour. Stuck pixels are fairly common on high resolution LCD screens. Stuck pixels sometimes start working again with time unless they appear black on a white background, these are known as dead pixels. JScreenFix will help re-energise stuck pixels on LCD screens in less than one hour. Plasma screens suffer terrible burn-in if an area of the screen does not change for a long period of time. Patterns on such areas will still be noticeable when new images are displayed. For TV input, channel logos often burn into the screen. For digital signage systems, the problem can be even more severe where words can still be read months after they were originally displayed. Image persistence has also been known to effect LCD screens. JScreenFix has been proven to remove burnt in areas in between 6 and 48 hours. Unlike other solutions, JScreenFix works on each colour cell individually in an un-coordinated fashion which means it is less stressful on the screen's power circuitry and far less likely to cause photosensitive epilepsy. JScreenFix does not require installation and will run on Windows, Linux and Mac computers.