Settings

Keyboard Shortcuts

Theme

Default: System

Controls the color scheme of the Rex interface.

• System — Follows your operating system’s appearance
• Light — Light background with dark text
• Dark — Dark background with light text

Import

Rex can import requests from multiple formats. Open the import dialog and either paste content or upload a file — Rex auto-detects the format.

Import reports a summary with any warnings for unsupported fields.

Export

Export your data in multiple formats:

Code Generation

Generate working code snippets from any request. Click the code generation button in the response panel toolbar.

Supported Languages

Generated snippets include authentication, headers, and body configuration. Copy to clipboard with one click.

API Documentation Viewer

Load an OpenAPI 3.x or Swagger 2.0 spec (from a file or URL) to browse API documentation inside Rex:

• Endpoints organized by tag with search
• Parameters, request body, and response schemas for each endpoint
• Security requirements
• Try it button pre-fills the request builder with the endpoint details

Cookie Editor

View cookies for any domain from the Cookies tab in the request panel:

• Cookie name, value, and flags (HttpOnly, Secure, SameSite)
• Delete individual cookies
• Direct access to the browser’s cookie jar via Chrome extension APIs

Layout

Rex’s layout is fully customizable:

• Sidebar width — Drag the divider to resize (collapses automatically below 150px)
• Request/response split — Drag the horizontal divider to adjust the vertical split
• Layout preferences persist across sessions

Storage

All Rex data is stored locally on your device:

IndexedDB (via Dexie)

localStorage

Privacy

• All data stored locally in IndexedDB and localStorage
• No external API calls except to endpoints you specify
• No telemetry, analytics, or tracking
• No account system or cloud storage
• Host permissions (<all_urls>) are used solely to send requests to the endpoints you specify