# React Intl > React Intl file localization URL: https://store.crowdin.com/react-intl Category: File Formats Type: System Author: Crowdin React Intl 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) | react_intl | | Source can be edited in Crowdin | No | | 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 { "key1": { "defaultMessage": "Umbrella", "description": "application title" }, "key2": { "defaultMessage": "Save as...", "description": "save as button" }, "key3": { "defaultMessage": "Click to start!", "description": "sign up step1" } } ```