- If you have little time and money, use any of the automated tools mentioned in the other comments - If you want the best results, do extensive user testing

- If you have little time and money, use any of the automated tools mentioned in the other comments - If you want the best results, do extensive user testing - If you are somewhere in the middle, do manual testing yourself. Simply turning on a screen reader and covering the screen with a sheet of paper does wonders. - Think about accessibility from the start, even before you write the first line of code (just like with security). It is very hard to fix it after the fact.