Payload is the open-source, fullstack Next.js framework, giving you instant backend superpowers. Get a full TypeScript backend and admin panel instantly. Use Payload as a headless CMS or for building powerful applications.
| **`validate`** | Provide a custom validation function that will be executed on both the Admin Panel and the backend. [More details](/docs/fields/overview#validation). |
| **`index`** | Build an [index](../database/indexes) for this field to produce faster queries. Set this field to `true` if your users will perform queries on this field's data often. |
| **`saveToJWT`** | If this field is top-level and nested in a config supporting [Authentication](/docs/authentication/overview), include its data in the user JWT. |
| **`hooks`** | Provide Field Hooks to control logic for this field. [More details](../hooks/fields). |
| **`access`** | Provide Field Access Control to denote what users can see and do with this field's data. [More details](../access-control/fields). |
| **`hidden`** | Restrict this field's visibility from all APIs entirely. Will still be saved to the database, but will not appear in any API or the Admin Panel. |
| **`defaultValue`** | Provide data to be used for this field's default value, will default to false if field is also `required`. [More details](/docs/fields/overview#default-values). |
| **`custom`** | Extension point for adding custom data (e.g. for plugins) |
| **`typescriptSchema`** | Override field type generation with providing a JSON schema |
| **`virtual`** | Provide `true` to disable field in the database, or provide a string path to [link the field with a relationship](/docs/fields/relationship#linking-virtual-fields-with-relationships). See [Virtual Fields](https://payloadcms.com/blog/learn-how-virtual-fields-can-help-solve-common-cms-challenges) |