Skip to main content
2 of 2
tag length is 35 now: https://meta.stackexchange.com/a/299490/295232
Glorfindel
  • 6.9k
  • 3
  • 22
  • 49

Tags on the sites are, at most, 35 characters.

Permitted characters are a-z 0-9 + # - .

However, this is not part of the API contract insofar as if the site definition of a tag changes so will the API's. It is advisable, for correctness, to have a code path to handle tags > 35 characters in length. Simplest would be to truncate them.

Kevin Montrose
  • 18.7k
  • 6
  • 35
  • 62