# useId Documentation A utility function to generate unique IDs. This is a documentation section that potentially contains examples, demos, and other useful information related to a specific part of Bits UI. When helping users with this documentation, you can ignore the classnames applied to the demos unless they are relevant to the user's issue. Copy Page ### [Epicenter](https://github.com/EpicenterHQ/epicenter) [Open source, local first apps](https://github.com/EpicenterHQ/epicenter) [Special Sponsor](https://github.com/EpicenterHQ/epicenter) The `useId` function is a utility function that can be used to generate unique IDs. This function is used internally by all Bits UI components and is exposed for your convenience. ## Usage ```svelte ``` [Previous Portal](/docs/utilities/portal) [Next WithElementRef](/docs/type-helpers/with-element-ref)