What is the best way to glue a crack in a round pedestal table bottom?

What material is the table? Can you put wood glue in the crack? although I would use wood filler, if it’s wood!

Most important bit is what is the pedestal made from? All adhesives work well on only certain materials and nothing glues everything well.

Would help if you could show a picture or describe the crack. Is it just cosmetic or is there a chance it could break in two?

Get as much wood glue as you can into the crack to try to seal it off. If it seems to be holding well and sturdy, fill in any extra space with wood filler and smooth it out.

Wood filler is the best solution to fill a crack in wood especially if the crack if very wide but you will want to buy a wood filler as close to the color of your table as you can find unless you are planning to paint your table. Wood glue is strong but stain won't stick to it and if painting you might have to seal it before painting. Wood filling will accept stain but in most cases it stains much darker then the surrounding wood. If you crack is small and you can strap your piece then you can use wood filler or glue (on narrow cracks wood glue works best) and immediately strap your wood tightly together and let it dry. If this is done you won't need to stain over your crack once it's dry. If you strap it tight enough you won't be able to tell it was ever cracked once it's dry. Good luck!

I remember answering this yesterday but that answer is not here. Okay, what is happening is the glue used to build these pedestals is failing. My approach would be to tap a screwdriver in where you won't see the damage it will make to open up the crack. Work in as much yellow wood glue as you can into the crack. Use a ratchet tie-down strap from the auto department at Walmart (around $10 a pair) to squeeze the crack back together. Wipe off glue that squeezes out with a damp cloth. Dry overnight with the clamp attached.