Spell a number out in English words online — useful for cheques and accessibility.
Convert a number into its English words, e.g. 1234 → "one thousand two hundred thirty-four". Handles negatives and scales up to the quintillions.
Writing amounts on cheques, invoices and legal documents, and for screen-reader-friendly output.
Up to about 10^18 (quintillions). The integer part is spelled; decimals are truncated.