If your toddler is escaping his crib he may be ready to move out of the crib and into a toddler bed or twin bed.
If you don't think your toddler is ready to move to a toddler bed or twin bed then you might try lowering the crib mattress down in the crib so that it makes it harder for the toddler to climb out of the crib.
If that is not possible then you could try putting your toddler in a sleep sack but he may not like it however sometimes it helps them sleep and they will not be able to move around.
And when they cannot move around and stand up then they cannot climb out of the crib.
Or try a crib tent that helps keep the baby in the crib.
But if the toddler is ready to move out of the crib to a toddler bed then that would be the best option.
Also I almost forgot but they make and sell some crib keeper Pajamas for your toddler.
The footed pajamas have fabric sewn between the legs that prevent your toddler from lifting their legs over the crib rails so they cannot climb out.
The toddler can still walk pretty easily and move around but they cannot lift their legs up to escape the crib.
Check out the website
https://littlegrounders.com/ for those crib escaping pajamas.
You could also sew some fabric to your toddlers current footed Pajamas as well and that would do the same thing.