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cdp4j - Chrome DevTools Protocol for Java

cdp4j is a web-automation library for Java. It can be used for automating the use of web pages and for testing web pages. It use Google Chrome DevTools Protocol to automate Chrome/Chromium based browsers.


  • Supports full capabilities of the Chrome DevTools Protocol (tip-of-tree)
  • Evaluate JavaScript
  • Invoke JavaScript function
  • Supports native CSS selector engine
  • Supports XPath queries
  • Incognito Browsing (private tab)
  • Full page screen capture
  • Trigger Mouse events (click etc...)
  • Send keys (text, tab, enter etc...)
  • Redirect log entries (javascript, network, storage etc...) from browser to slf4j
  • Intercept Network (request & response)
  • Upload file programmatically without third party solutions (does not requires AWT Robot etc...)
  • get & set Element properties
  • Supports Headless Chrome/Chromium
  • Navigate back, forward, stop, reload
  • clear cache, clear cookies, list cookies
  • set & get values of form elements
  • Supports event handling

Supported Java Versions

Oracle & OpenJDK Java 8 & 11.

Both the JRE and the JDK are suitable for use with this library.


cdp4j is licensed as cdp4j Commercial License.

It's illegal to use cdp4j without having a commercial license.

cdp4j IS NOT A FREE SOFTWARE. Buying a license is mandatory as soon as you develop commercial activities distributing the cdp4j inside your product or deploying it on a network.


This library is suitable for use in production systems.

Integration with Maven

To use the official release of cdp4j, please use the following snippet in your pom.xml file.

Add the following to your POM's <dependencies> tag:


Using development (SNAPSHOT) version:



cdp4j-3.0.8.jar - 864 KB

cdp4j-3.0.8-sources.jar - 658 KB

Supported Platforms

cdp4j has been tested under Windows 10, macOS and Ubuntu, but should work on any platform where a Java & Chrome/Chromium available.

Release Notes

Headless Mode

cdp4j can be run in "headless" mode using with --headless argument.

Install Chrome on Debian/Ubuntu

sudo apt-get install libxss1 libappindicator1 libappindicator3-1 libindicator7
sudo dpkg -i google-chrome*.deb # Might show "errors", fixed by next line
sudo apt-get install -f

Install Chrome on RHEL/CentOS/Fedora

sudo yum install google-chrome-stable_current_*.rpm

Test headless Chrome

google-chrome --headless --remote-debugging-port=9222 --disable-gpu


cdp4j api


Simple logger for Java (SLF4J) and log4j 1.x is supported.

Design Principles

  • Avoid external dependencies as much as possible.
  • Support only Chrome/Chromium based browsers.
  • Supports full capabilities of the Chrome DevTools Protocol.
  • Keep the API simple.

Usage Examples

Print text content with cdp4j

Launcher launcher = new Launcher();
try (SessionFactory factory = launcher.launch();
                    Session session = factory.create()) {
    String content = (String) session.getProperty("//body", "outerText");

Full page screen capture with cdp4j

Launcher launcher = new Launcher();
Path file = createTempFile("screenshot", ".png");
try (SessionFactory factory = launcher.launch();
                    Session session = factory.create()) {
    // activate the tab/session before capturing the screenshot
    byte[] data = session.captureScreenshot();
    write(file, data);
if (isDesktopSupported()) {

Print to PDF with cdp4j

Launcher launcher = new Launcher();
Path file = createTempFile("webfolder-linux-setup", ".pdf");
try (SessionFactory factory = launcher.launch(asList("--headless", "--disable-gpu"))) {
    String context = factory.createBrowserContext();
    try (Session session = factory.create(context)) {
        byte[] content = session
        write(file, content);
        if (isDesktopSupported()) {


- - - -
Attributes Bing BingTranslator CheckBox
ExecuteJavascript GoogleTranslate HelloWorld IncognitoBrowsing
Logging MultiSelect NetworkResponse Screenshot
Select SendKeys SharedSession EvaluateOnNewDocument
UserAgent WaitUntil XPathSelector CodeCoverage
PrintToPDF BasicAuthentication DownloadFile Crawler
MultiProcess FollowRedirects CloseSessionOnRedirect Readability
InvokeJavaFromJs InvokeJsFromJava

Building cdp4j

# Assume that you have `google-chrome` in your $PATH
mvn install

# If you use different version of Google Chrome like Chromium, Chrome Canary,
# then you must explicitly use the `chrome_binary` property to make the code work.

mvn install -Dchrome_binary=/path/to/your/google-chrome

# e.g. For some Linux distribution
mvn install -Dchrome_binary=/usr/lib/chromium-dev/chromium-dev

# e.g. MacOS it may be something like
mvn install -Dchrome_binary=/Applications/

# To run the existing tests try
mvn test -Dchrome_binary=/usr/lic/chromium-dev/chromium-dev

How it is tested

cdp4j is regularly built and tested on Windows 10 and Ubuntu.

Getting Help


You can support cdp4j development by buying support package. Please contact us for support packages & pricing.

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