I would like to add strings into bytes32. What is the maximum number of letters bytes32 can have?

1 Answer 1


Each bytes32 can store up to 32 letters (ASCII): each character is a byte.

  • 1
    How about UTF-8? Jul 1, 2016 at 13:36
  • 2
    Same answer 32: the first 128 characters of UTF-8 correspond one-to-one with ASCII, which is where the usual letters and numbers are.
    – eth
    Jul 1, 2016 at 13:42

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