This tool is based on the work of user Arachobia on RPG Crossing with his permission. He had taken a list of tables from Dragon magazine #422 in an article called "Building Character" by Matt Sernett and updated them for 5th edition. I've turned them into an automatic tool for generating a characters background.

Instructions: Refresh the page to generate a new background story. As always, you can use it however you like and fill in your own details. Your age and acquired proficiencies are listed at the bottom and are based on the results you got. Try to pick a Race/Class/Background combo that fulfills all the proficiencies. Your age may also result in ability score modifiers that can be applied after building your character.

...or ignore everything and do whatever you want. Whatever.
Background Generator

(T.101): One of your parents was a diplomat. You will have proficiency in Persuasion.

(T.102): If this is your 2nd (or higher) roll on this table, you were separated from your siblings as a child. Continue on to Table 2 to determine these siblings, re-rolling if you roll a 1, 2 or 20.

(T.2): An identical twin.

(T.3): You were kidnapped and enslaved. Roll on Table 16

(T.16): You escape your life as a slave, and want to make the one responsible pay. If you have not yet encountered a villain who could be responsible for your enslavement, roll on Table 5 now. Either way, proceed to Table 9.

    >>>> (T.5): A noble.

(T.9): You become trapped with your enemy. Now, former foes must work together to survive! Roll on Table 31 to see how you in particular fare from this arrangement, then roll on Table 8 to see where you eventually ended up after enduring your ordeal and parting ways with your possibly former enemy (or they ran away once they no longer needed you).

    >>>> (T.31): You pull through easily enough. You will have proficiency in Survival.

(T.8): A military camp. You are drafted to Table 22.

(T.22): You performed well during your service, but mostly become known for the allied lives you saved. You will have proficiency in Medicine. Your life of adventure begins.

Total Rolls: 10
Your age is ADULT
Adults are at the most equalized stage of development. From here their physical body will begin to weaken while their minds and personalities benefit from experience.
Adults have no modifiers to their attributes.