You can boil chlorine out of water, provided it is free chlorine rather than chloramine. Free chlorine is volatile, so heat and the turbulence of a rolling boil drive it out of solution and into the air above the pot. The method is simple and works, but it is a pot at a time, which is the reason it never scales up to a household supply.
The method, done properly
Fill an open pot, leave the lid off, and bring it to a rolling boil for a few minutes. The lid matters: a covered pot condenses vapor and returns chlorine to the water. Then let it cool uncovered before you use or bottle it. A gentler version is to fill an open jug and leave it on the counter overnight, which works on free chlorine without any energy at all, just more slowly.
Why it does not scale up
The method treats what fits in the pot. Boiling water for drinking, cooking, coffee and pet bowls means running the stove constantly, waiting for it to cool, and finding storage for the result, all while the shower and the laundry still run chlorinated water. If chlorine taste is the household complaint, an activated carbon filter at the tap or on the incoming line handles it continuously and without attention.
The chloramine exception
Many utilities use chloramine, which is chlorine bound with ammonia and deliberately far more stable through the distribution network. That stability defeats boiling: a normal kitchen boil removes very little of it. If your supply is chloraminated, catalytic carbon is the practical removal route, either as a whole-house tank or a point-of-use cartridge sized correctly for the flow.
Well owners usually want the opposite
Plenty of people asking this question are on a private well where chlorine is being added on purpose, by a chlorine injection system or a shock chlorination, to deal with bacteria or iron. EPA notes private wells are not federally regulated under the Safe Drinking Water Act, so that dosing is the owner's responsibility. There, the aim is a contact tank and a carbon filter after it, not a pot on the stove.
Questions people ask about can you boil chlorine out of water
How long does boiling take to remove chlorine?
A few minutes at a rolling boil in an uncovered pot removes most free chlorine. Leaving water to stand uncovered achieves the same thing over several hours.
Does boiling remove chlorine from water for plants or fish?
It removes free chlorine, which is why the trick is common. It does not deal with chloramine, so check what your utility uses before relying on it.
Is chlorinated tap water unsafe to drink?
Chlorine is added deliberately to keep the supply free of pathogens. Most people who remove it are addressing taste and odor rather than a safety concern.