What is the maximum character length for a Tumblr tag?

What is the maximum character length for a Tumblr tag? The answer is 140 characters.

Tumblr tags are labels attached to posts so users can describe content and help others discover it through searches. Unlike the text in a Tumblr post, an individual tag has a specific length limit: it can contain up to 140 characters. Spaces and special characters are allowed, so a tag can be a phrase rather than just a single word.

The number is easy to confuse with older social-media limits. Twitter, for example, originally used a 140-character post limit, while Tumblr’s 140-character figure applies to each tag, not to an entire post. Tumblr also limits how many tags are indexed for search, but that is a separate rule from the length of one tag.

Tumblr’s tagging culture also includes conversational or commentary tags, not just descriptive labels. Users may use tags to add reactions, context, or jokes after the main post. Those tags still count toward the same per-tag character ceiling.