How can I upcycle old glass sliding doors?

Vicki: donate them to a Habitat for Humanity store

It really depends on how old they are....if they are VERY old, DON'T do anything with them except throw them away because they may not be made with tempered glass (that breaks into small rounded pebbles when broken). If they aren't made of tempered glass, make sure that you dispose of them carefully (make sure you tape them with masking tape before disposal).

If you have a shed, barn, basement or attic, you may be able to use the doors for their intended purpose. If you want barn doors across closets, you should find railings for these to slide on. You can use large decals or artwork to decorate the doors. For instance, a life size superhero decal on a glass door may delight (or frighten) a child. If you have a crawling infant, a toddler, or a pet, you may be able to use one or two of the doors to block off your Christmas tree, hearth and fireplace, or other dangerous areas in your house or garage. You can find hardware to hang one or more of these doors in home improvement stores, although you will probably have to adapt the setup to your own needs. The next best use would be to donate the doors to a Habitat for Humanity store for someone else to use. I’d love to see how you use the doors. Please post the project on Hometalk. It would be very useful. Jewell

Thanks to all

You can't cut that glass if its tempered.... it has to be heated to 1000 degrees. You can take to a company that has a kiln and makes tempered glass to have them recut it.