About a year ago, we shared a neat DIY method of transferring black-and-white photos onto blocks of wood. A very similar technique can be used for displaying your photos on glass. Inspired Ideas writes that all you need are a toner-based print of your photo (e.g. using a copier or laser printer) and some clear contact paper.
Sticking the contact paper to your print will transfer the toner from your ordinary paper to the sticky transparent film. The next step is to soak the two connected sheets in water, which softens up the white paper and allows it to be rubbed off. What you’re left with is a piece of wet transparent contact paper that features your photo. Let it dry to restore its stickiness, and then attach the resulting “sticker” to whatever you’d like to show off your photo on (e.g. glass jars, candle holders, windows etc.)