About this tool
Generate the first N Fibonacci numbers, where each value is the sum of the two before it. It uses BigInt so even very large terms are exact — all generated in your browser.
Frequently asked questions
Where does the sequence start?
It starts from 0 and 1, so the first few numbers are 0, 1, 1, 2, 3, 5, 8, 13 and so on.
How many numbers can I generate?
Up to about a thousand terms, which keeps the output fast while still exact thanks to BigInt arithmetic.