index.md

---
title: WebDriver
slug: Web/WebDriver
page-type: landing-page
sidebar: webdriver
---

WebDriver is a browser automation interface that allows external programs to remotely inspect and control a browser. It is a platform- and language-neutral wire protocol, supporting both command-based automation and real-time, event-driven communication.

WebDriver provides tooling for [cross-browser testing](/en-US/docs/Learn_web_development/Extensions/Testing/Introduction), helping teams deliver consistent user experiences across many browsers and platforms. It is intended to allow web authors to write tests to automate a browser from a separate controlling process.

WebDriver is available in two variants: [WebDriver classic](/en-US/docs/Web/WebDriver/Reference/Classic) that uses HTTP, and [WebDriver BiDi](/en-US/docs/Web/WebDriver/Reference/BiDi) that uses WebSocket and enables bidirectional, event-driven communication.

## Reference

Browse the complete [WebDriver reference](/en-US/docs/Web/WebDriver/Reference) documentation.

- [WebDriver BiDi](/en-US/docs/Web/WebDriver/Reference/BiDi)
  - : Reference for WebDriver BiDi modules, commands, and events.

- [WebDriver classic](/en-US/docs/Web/WebDriver/Reference/Classic)
  - : Reference for WebDriver classic commands and timeouts.

- [Capabilities](/en-US/docs/Web/WebDriver/Reference/Capabilities)
  - : Reference for WebDriver capabilities.

- [Errors](/en-US/docs/Web/WebDriver/Reference/Errors)
  - : Reference for WebDriver errors.

## Specifications

- [WebDriver](https://w3c.github.io/webdriver/)
- [WebDriver BiDi](https://w3c.github.io/webdriver-bidi/)

## See also

- [Testing](/en-US/docs/Learn_web_development/Extensions/Testing)
- [Selenium documentation](https://www.selenium.dev/documentation/)