Is there a character limit on ticket comments?

Question

How many characters can I add to a single comment?

Answer

The character limit on ticket comments in the standard agent interface is 65,535. For example, if you submit a plain text comment with 100,000 characters, the system truncates it to the first 65,535 characters.

In accounts with the Zendesk Agent Workspace turned on, the system saves comments in HTML format. All HTML tags and characters count toward the 65,535 limit. Agent Workspace doesn't support truncation. Comment submission fails if you exceed the character size limit.

If markdown or rich text formatting is on and in use, the system might truncate comments more. Extra characters encode formatting in markdown and rich text. Even if these characters are hidden, they count toward the character limit.