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Selenium — automate real browsers through the W3C WebDriver standard

OSS scale score 331.8OSS health 100Update pace 173 commits/30d
About these scores

OSS scale score is an unbounded metric that log-compresses and weights Stars, Watchers, Forks, and Contributors. Discovery score is the current OSS scale score minus the score at discovery. Update pace is commits in the last 30 days, growth momentum is the OSS scale score difference within the recent observation window, and OSS health is a 0–100 rating based on available recency, Community Health, and release data.

Stars
34,502
Primary language
Java
License
Apache-2.0
Repository last updated
Sep 20, 2026

Overview

Selenium is a browser-automation framework and ecosystem built around the W3C WebDriver specification. It controls Chrome, Firefox, Edge, and other real browsers from Java, Python, JavaScript, .NET, Ruby, and other bindings, with Selenium Grid supporting distributed execution.

Features and best fit

Based on official documentation; not hands-on tested · Content checked:

Control major browsers through W3C WebDriver

Browser-vendor WebDriver implementations expose navigation, elements, forms, windows, and other browser behavior through a standards-based API.

Sources: [2][4]

Scale browser tests across languages and Grid

Multiple language bindings and Selenium Grid allow test suites to run across browser, version, and operating-system combinations.

Sources: [2][4]

For end-to-end verification of real browser user flows

Selenium fits web applications that need automated validation of login, forms, navigation, and other real user interactions before release.

Sources: [2][4]

Manage the flakiness and execution cost inherent in E2E tests

UI selectors and asynchronous behavior can make browser tests fragile. Keep lower-level checks in unit/component tests and use explicit waits, stable locators, and isolated test data.

Sources: [4]

Official sources

  1. [1]SeleniumHQ/selenium repository(2026-09-20)
  2. [2]Selenium README(2026-09-20)
  3. [3]Selenium Apache-2.0 license(2026-09-20)
  4. [4]Selenium documentation(2026-09-20)
Supplemental curator note

Selenium's distinguishing strength is its long-established, standards-based W3C WebDriver ecosystem spanning major browsers and multiple languages. Browser tests are inherently sensitive to UI and timing changes, so keep them focused on end-to-end boundaries and use stable locators and explicit waits.

Try it in 3 steps

  1. 1

    Install the Selenium Python binding

    Use a test environment with Chrome or Chromium installed. Selenium Manager can resolve the matching driver.

    python -m pip install selenium
  2. 2

    Launch a headless browser against a local data URL

    Exercise a real headless browser without contacting an external website.

    python -c 'from selenium import webdriver; from selenium.webdriver.chrome.options import Options; o=Options(); o.add_argument("--headless=new"); d=webdriver.Chrome(options=o); d.get("data:text/html,<title>demo</title><h1>Hello</h1>"); print(d.title); d.quit()'
  3. 3

    Point the same flow at your localhost app

    Add stable locators and explicit waits to grow the example into an end-to-end test for an application you control.

    Replace the data: URL with http://127.0.0.1:<port> for your own test app
Check the official README

Growth

Growth trends · Last 30 days

34,502 Stars

Trend data is still being collected.

Development activity

Last 90 days · weekly

Commits (last 30 days)
173
Open PRs
87
Issues opened
51
Issues closed
58
PRs opened
298
PRs merged
260

Issues

51 / 58

Jun 23Sep 20
Issues openedIssues closed

Pull requests

298 / 260

Jun 23Sep 20
PRs openedPRs merged

Maintenance

Median first response
0 min
Issue response rate
75% (24/32)

Based on up to the 100 newest issues opened by external users in the last 90 days. A first comment from an OWNER, MEMBER, or COLLABORATOR counts as a response; issues whose full comment history cannot be checked are excluded. The median and response rate update weekly.

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GitHub data

GitHub dataView detailed GitHub data
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GitHub Topics

  • selenium
  • webdriver
  • java
  • ruby
  • python
  • javascript
  • dotnet
  • rust
Stars
34,502
Forks
8,717
Watchers
1,249
Open issues
102
Contributors
403
Primary language
Java
License
Apache-2.0
Repository last updated
Sep 20, 2026
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