About Headcanon Generator AI

Fans, writers and role-players use headcanons to explore the characters they love. Headcanon Generator AI turns a short brief about a character, a pairing or an original character into headcanons of six types and three lengths, as plain text you can copy anywhere.

Headcanons are written by Claude Haiku 5.5 and Claude Sonnet 5 through a commercial model API, guided by our own instructions for specific, in-character ideas. Claude Haiku 5.5 is the fast, low-cost choice; Claude Sonnet 5 writes richer characterization and story snippets.

The generator does not write sexual content, romance involving anyone under 18 (including characters described as aged up), content about real, living people, or gore. Briefs that ask for these are refused, and their credits are refunded.

Headcanons are interpretations, not canon. The models know many well-known characters but can misremember details of a source and do not know every character. Each run is independent and remembers nothing from earlier runs.

A run costs 1 credit with Claude Haiku 5.5 or 8 credits with Claude Sonnet 5, shown before you generate. Registration is free, with no credits included. Credits come from one-time packs from $4.99 or monthly plans from $7.99.

Briefs and headcanons are stored to show your history and are sent to the model provider only to write your headcanons. We do not sell them or use them to train models.

For questions about your account, billing, refunds or data, write to us from the email address on your Headcanon Generator AI account. Refund requests follow the refund policy and data requests follow the privacy policy.