# Chrome JSON > Localization format for Google Chrome extensions and themes URL: https://store.crowdin.com/chrome-json Category: File Formats Type: System Author: Crowdin Chrome JSON is a natively supported file format, you can use it without an additional installation. Just upload it to your projects and start the localization. ## File Format Details | Attribute | Value | | --------- | ----- | | File Extension | .json | | [API Type](https://developer.crowdin.com/api/v2/#operation/api.projects.files.post) | chrome | | Source can be edited in Crowdin | Yes | | Generating translated files via [Bundles](https://support.crowdin.com/bundles/) | [Search Crowdin Store](https://store.crowdin.com/tags/string-exporter) | | Supports pluralization | No | | WYSIWYG Preview in the editor | No | | Supported types of contextual information | Text comments, Screenshots | | Custom attributes | No | | Existing translations import possibility | Key-value mapping | ## Sample File ```json { "appName": { "message": "string 1", "description": "context_1" }, "extName": { "message": "string 2", "description": "context_2" }, "extDesc": { "message": "string 3", "description": "context_3" } } ```