Version: 1.1.0

Device and environment emulation

Playwright allows overriding various parameters of the device where the browser is running:

  • viewport size, device scale factor, touch support
  • locale, timezone
  • color scheme
  • geolocation
  • etc

Most of these parameters are configured during the browser context construction, but some of them such as viewport size can be changed for individual pages.

User agent#

All pages created in the context above will share the user agent specified:

const context = await browser.newContext({
userAgent: 'My user agent'

API reference#

Viewport, color scheme#

Create a context with custom viewport size:

// Create context with given viewport
const context = await browser.newContext({
viewport: { width: 1280, height: 1024 }
// Resize viewport for individual page
await page.setViewportSize({ width: 1600, height: 1200 });
// Emulate high-DPI
const context = await browser.newContext({
viewport: { width: 2560, height: 1440 },
deviceScaleFactor: 2,
// Create device with the dark color scheme:
const context = await browser.newContext({
colorScheme: 'dark'
// Change color scheme for the page
await page.emulateMedia({ colorScheme: 'dark' });

API reference#


Playwright comes with a registry of device parameters for selected mobile devices. It can be used to simulate browser behavior on a mobile device:

const { chromium, devices } =
const browser = await chromium.launch();
const pixel2 = devices['Pixel 2'];
const context = await browser.newContext({

All pages created in the context above will share the same device parameters.

API reference#

Locale & timezone#

// Emulate locale and time
const context = await browser.newContext({
locale: 'de-DE',
timezoneId: 'Europe/Berlin',

API reference#


Allow all pages in the context to show system notifications:

const context = await browser.newContext({
permissions: ['notifications'],

Grant all pages in the existing context access to current location:

await context.grantPermissions(['geolocation']);

Grant notifications access from a specific domain:

await context.grantPermissions(['notifications'], {origin: ''} );

Revoke all permissions:

await context.clearPermissions();

API reference#


Create a context with "geolocation" permissions granted:

const context = await browser.newContext({
geolocation: { longitude: 48.858455, latitude: 2.294474 },
permissions: ['geolocation']

Change the location later:

await context.setGeolocation({ longitude: 29.979097, latitude: 31.134256 });

Note you can only change geolocation for all pages in the context.

API reference#