if you don't want to explicitly create a js file but still want to test your javascript code, you can use snippets to run your JS code.
Follow the steps here:
- Open Dev Tools
- Go to Sources Tab
- Under Sources tab go to snippets, + New snippet
- Paste your JS code in the editor then run Command + Enter on a Mac, or Ctrl + Enter on Windows or Linux. You should see the output in console if you are using console.log or similar to test. You can edit the current web page that you have open or run scripts, load more javascript files. (Just note: this snippets are not stored on as a js file, unless you explicitly did, on your computer so if you remove chrome you will lose all your snippets);
- You also have a option to save as your snippet if you right click on your snippet.
BrowserStack
browserstack.com โบ home โบ guide โบ how to test javascript in browsers (with 5 methods)
How to test JavaScript in Browsers (with 5 Methods) | BrowserStack
March 28, 2025 - The infrastructure enables a developer ... like Chrome, Safari, IE, Edge, Firefox, etc. Users can also access free tools like responsive layout testing and screenshot testing, which tests the validity of JavaScript on a particular web page. The wide range of OS-browser combinations and the latest real devices provided by BrowserStack for testing purposes is unmatched. Itโs pretty simple to use and instantly test Javascript in your browser. ... JSFiddle is an online tool that ...
LambdaTest
lambdatest.com โบ software-testing-questions โบ how-to-run-javascript-in-chrome-browser
How to Run JavaScript in Chrome Browser: A Quick Guide
Alternatively, click the three-dot menu in the top-right corner of Chrome, select "More tools," and then select the Developer tools option. When DevTools opens, go to the Console tab.
Videos
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BrowserStack
browserstack.com โบ home โบ guide โบ how to run javascript in chrome browser
How to Run JavaScript in Chrome Browser | BrowserStack
April 4, 2025 - Performance Optimization: Chromeโs V8 JavaScript engine ensures faster script execution, optimizing web applications for better speed, responsiveness, and efficiency. Real-Time Testing: Chromeโs Developer Console allows developers to instantly execute and modify JavaScript code, making it easy to test scripts and see results without reloading the page.
Top answer 1 of 10
129
if you don't want to explicitly create a js file but still want to test your javascript code, you can use snippets to run your JS code.
Follow the steps here:
- Open Dev Tools
- Go to Sources Tab
- Under Sources tab go to snippets, + New snippet
- Paste your JS code in the editor then run Command + Enter on a Mac, or Ctrl + Enter on Windows or Linux. You should see the output in console if you are using console.log or similar to test. You can edit the current web page that you have open or run scripts, load more javascript files. (Just note: this snippets are not stored on as a js file, unless you explicitly did, on your computer so if you remove chrome you will lose all your snippets);
- You also have a option to save as your snippet if you right click on your snippet.
2 of 10
17
Try this:
1. Install Node.js from https://nodejs.org/
2. Place your JavaScript code into a .js file (e.g. someCode.js)
3. Open a cmd shell (or Terminal on Mac) and use Node's Read-Eval-Print-Loop (REPL) to execute someCode.js like this:
> node someCode.js
Hope this helps!
Code Beautify
codebeautify.org โบ javascript-tester
Javascript Tester to test Javascript code online with Console
It helps to debug your Javascript. Tester JS Online works well on Windows, MAC, Linux, Chrome, Firefox, Edge, and Safari.
Chrome Developers
developer.chrome.com โบ docs โบ chrome devtools โบ run javascript in the console
Run JavaScript in the Console | Chrome DevTools | Chrome for Developers
April 18, 2018 - DevTools lets you pause a script in the middle of its execution. While you're paused, you can use the Console to view and change the page's window or DOM at that moment in time. This makes for a powerful debugging workflow. See Get Started With Debugging JavaScript for an interactive tutorial.
Chrome for Developers
developer.chrome.com โบ docs โบ chrome devtools โบ debug javascript
Debug JavaScript | Chrome DevTools | Chrome for Developers
May 22, 2024 - Learn how to use Chrome DevTools to find and fix JavaScript bugs.
LambdaTest
lambdatest.com โบ home โบ blog โบ best 13 tools to test javascript code
Best 13 Tools To Test JavaScript Code | LambdaTest
October 31, 2023 - Execute the tests using the chosen frameworkโs command-line interface or test runner. Analyze the results to ensure your code functions as intended. To test JS code online, you can use various platforms like CodePen, JSFiddle, or Replit.
BrowserStack
browserstack.com โบ home โบ guide โบ how to run javascript code in a browser?
How to Run JavaScript Code in a Browser? | BrowserStack
November 26, 2024 - Open Chrome โ Press Ctrl + Shift + I (Windows) / Cmd + Option + I (Mac). Select Console. ... Press Enter. ... Open console with Option + Cmd + C. ... Press Enter. This guide explains how to run JavaScript code in different browsers and test ...
TestDome
testdome.com โบ tests โบ javascript-online-test โบ 14
JavaScript Online Test | TestDome
The JavaScript online test assesses knowledge of programming in the JavaScript language and core front-end web development concepts. This test contains a series of live coding tasks that are executed inside the Google Chrome web browser.
Codecademy
codecademy.com โบ article โบ running-javascript-in-the-browser-console
Running JavaScript in the Browser Console | Codecademy
Learn how to use Chrome DevTools (Developer Tools) to debug HTML, CSS, and JavaScript.
Web Toolkit Online
webtoolkitonline.com โบ javascript-tester.html
JavaScript Tester online
Run and test your JavaScript code securely with our 100% local online tool. No data is sent over the Internet โ everything runs in your browser! Fast, simple, and secure.
Chrome Web Store
chromewebstore.google.com โบ detail โบ run-javascript โบ lmilalhkkdhfieeienjbiicclobibjao
Run Javascript - Chrome Web Store
๐ฏ Instant Website Customization โ
Run custom JavaScript on ANY website automatically โ
Real-time code editor with syntax highlighting โ
Domain-specific scripts that persist forever โ
One-click enable/disable toggle ๐ป Professional Developer Experience โ
Built-in Ace Editor with intelligent code completion โ
Multiple jQuery versions (1.12.4, 2.2.4, 3.3.1) or go library-free โ
Persistent storage across browser sessions โ
Advanced error handling and debugging tools ๐ Enterprise-Grade Security โ
Manifest V3 compliant (latest Chrome standards) โ
Sandboxed execution envir
Quora
quora.com โบ How-do-you-test-JavaScript-code-in-a-browser
How to test JavaScript code in a browser - Quora
Now open your page that has your JS, click left mouse button and click on 'Inspect Element'. An Window consisting of tabs like 'Elements', 'Network', 'Sources' ... etc will open in current window.
OneCompiler
onecompiler.com โบ javascript
JavaScript Online Compiler & Interpreter
Executable in both browser and server which has Javascript engines like V8(chrome), SpiderMonkey(Firefox) etc.
Chrome Web Store
chromewebstore.google.com โบ detail โบ javascript-console-editor โบ ddmppghpeomnafjoenneolpbpfafkpeg
Javascript Console Editor - Chrome Web Store
Lets you test Javascript against a web page.
WhatIsMyBrowser.com
whatismybrowser.com โบ detect โบ is-javascript-enabled
Is JavaScript enabled? - WhatIsMyBrowser.com
June 26, 2024 - Nearly all websites need Javascript enabled these days, are you sure if you've got it enabled? This website will tell you if you have JavaScript enabled.
DZone
dzone.com โบ coding โบ javascript โบ how to test javascript code in a browser
How to Test JavaScript Code in a Browser
May 11, 2022 - Thus Google Chrome must be installed on your local machine for this method of JavaScript to work. It launches Google Chrome in headless mode for its operation. CodePen is one of the best online tools to test your HTML, CSS and JavaScript code online.
JSFiddle
jsfiddle.net
JSFiddle - Code Playground
JSFiddle - Test your JavaScript, CSS, HTML or CoffeeScript online with JSFiddle.
Chrome Developers
developer.chrome.com โบ docs โบ chrome devtools
Chrome DevTools | Chrome for Developers
Log messages and run JavaScript. Evaluate website performance. Find memory issues that affect page performance, including memory leaks, and more. Inspect, modify, and debug web apps, test cache, view storage, and more.