I have a couple of stripped screws that I need to get out and can't.

You can try using a screw driver (phillips if it's a four prong) and a hammer. Put the screw driver in the screw and hammer it into the screw to get a grip. Then try to back out the screw manually. If that doesn't work, you may need to drill through the screw, then fill with Bondo, let dry and start again with a new screw. Going forward, always drill a hole slightly smaller than the screw, then screw into the hole. Good luck.

There is a tool you can buy called a screw extractor for about $10 that will allow you to remove striped screws.

Is the screw all the way down into the wood or is the screw still up above the wood? Take a dremel and put a cut off wheel in the dremel and cut a slit into the screw not you will have a new place to put a flathead scree driver into. If the screw is above the wood try using a pair of vice grips or channel lock tool to unscrew. This has always worked for me when I stripped a screw. I forgot to mention use eye protection while using a Dremel.

https://www.youtube.com/watch?v=_mTFQbaT3Zc

Try a magnet first. If that doesn't work they make a kit to remove stripped screws. Any hardware store will have it.

Occasionally I've been able to remove stripped screws by using a square drill tip. I learned it from furniture movers and it works about 85% of the time.