A fresh VS Code install is a solid general-purpose editor, but a handful of extensions make it noticeably better suited to actually writing code every day. This guide covers how extensions work and the small set genuinely worth installing as a beginner.
If you’ve worked through our guides on code editors and setting up your coding environment, you’ve already installed the language extension for whatever you’re learning. This guide goes further, covering a handful of additional extensions that genuinely improve everyday coding, without overwhelming your setup with dozens of tools you’ll never use.
How Extensions Actually Work
According to VS Code’s official documentation, extensions let you add languages, debuggers, and tools to your installation, and you can install them directly from the Visual Studio Marketplace with automatic updates keeping them current going forward.
To browse and install extensions, open the Extensions view using the icon in the sidebar (or Ctrl/Cmd+Shift+X), search for what you need, and click Install. According to VS Code’s extension marketplace documentation, each listing shows a description, publisher, download count, and rating — genuinely useful signals for judging whether an extension is trustworthy and actively maintained before installing it.
Prettier: Automatic Code Formatting
Prettier automatically reformats your code every time you save, enforcing consistent spacing, indentation, and line breaks according to a widely-used set of style conventions. Rather than manually fixing formatting inconsistencies, or debating style preferences with yourself, Prettier just handles it — supporting most common languages including JavaScript, CSS, and HTML.
Once installed, enable “format on save” in VS Code’s settings, and every file you work on will be automatically tidied the moment you save it — a small habit that removes an entire category of nitpicky manual cleanup from your workflow.
A Linter for Your Language
A linter scans your code as you write and flags likely mistakes — an unused variable, a missing bracket, an obvious typo — before you even try running the code. For Python, the Pylance extension (which also adds rich autocomplete and type checking) is the standard choice; for JavaScript, ESLint fills the same role. According to freeCodeCamp’s roundup of essential VS Code extensions, tools like this are nearly universally regarded as essential, catching problems early and reducing the cost of maintaining code over time.
Error Lens: Seeing Problems Immediately
Error Lens highlights the entire line where an error or warning occurs, printing the actual message inline rather than requiring you to hover over a small underline or check a separate panel. For a beginner, this is genuinely valuable — it turns “something’s wrong somewhere in this file” into “here’s exactly what’s wrong, on this specific line,” which speeds up the trial-and-error learning process considerably.
GitLens: Understanding Your Git History Visually
If you’ve worked through our Git basics guide, GitLens adds a visual layer on top of the terminal commands you’ve already learned — showing who last changed a specific line, when, and in which commit, directly inline in your editor. As a beginner working mostly solo, you won’t need its more advanced collaboration features right away, but even its basic “blame” annotations are a genuinely useful way to trace how a file evolved over time without leaving VS Code.
Live Server: Instant Preview for Web Projects
If you’re working through the HTML and CSS guides in this series, Live Server is worth installing early. Once active, it opens your HTML file in a browser and automatically refreshes the page every time you save a change — eliminating the small but real friction of manually switching to your browser and reloading after every edit.
How Many Extensions Is Too Many?
It’s tempting to install dozens of extensions once you discover the marketplace, but a smaller, well-chosen set genuinely serves a beginner better than an overloaded one. Each additional extension is one more thing that could slow down VS Code’s startup, conflict with another extension, or simply add visual clutter you never actually use. The handful covered here — a language extension, Prettier, a linter, Error Lens, and GitLens or Live Server depending on what you’re building — covers the overwhelming majority of what a beginner genuinely benefits from.
Installing an Extension, Step by Step
- Open the Extensions view (Ctrl/Cmd+Shift+X).
- Type the extension’s name into the search bar — for example, “Prettier.”
- Check the publisher name matches the official one (for Prettier, look for “Prettier – Code formatter” by the Prettier team).
- Click Install.
- Reload VS Code if prompted, and the extension is ready to use.
Extension Packs: Installing Several at Once
Some extensions are actually “packs” — a bundle of related extensions installed together with a single click, curated around a specific language or workflow. Instead of individually installing five separate Python-related tools, a Python extension pack might bundle the language support, a linter, and a few other useful pieces in one step. These can be a genuinely convenient shortcut once you know roughly what kind of project you’re setting up for, though it’s still worth reviewing what’s actually included before installing a pack, since not every bundled extension will be equally useful to you.
Configuring Extensions to Match Your Preferences
Many extensions add their own settings, which you can adjust through VS Code’s Settings editor (File → Preferences → Settings, or Ctrl/Cmd+,) rather than digging through separate configuration files. For Prettier, this might mean adjusting whether you prefer single or double quotes; for a linter, it might mean turning off a specific rule that doesn’t match your project’s conventions. As a beginner, the defaults are almost always reasonable enough to leave alone — it’s worth exploring these settings only once you’ve noticed something about the default behavior that genuinely bothers you, rather than tweaking preemptively before you’ve formed an actual opinion.
Uninstalling What You Don’t Use
It’s worth periodically reviewing your installed extensions and removing ones you haven’t actually used in a while. Open the Extensions view, find the extension, and use the gear icon to uninstall it — a quick, low-risk cleanup that keeps your editor focused and slightly faster to start up. There’s no penalty for reinstalling something later if it turns out you needed it after all, so err on the side of removing extensions you’re not actively relying on.
Recommended Extensions for a Workspace
Once you’re working on a project with other people, or even just want a consistent setup across your own machines, VS Code lets a project recommend specific extensions to anyone who opens it. Adding a .vscode/extensions.json file to a project’s root, listing recommended extension IDs, causes VS Code to prompt anyone opening that folder to install the suggested set. This is a genuinely useful habit once you start collaborating or maintaining multiple projects, since it removes the guesswork of manually recreating your extension setup every time you open something new, and ensures everyone touching the same codebase has similarly configured tooling available.
Common Questions Beginners Ask About Extensions
Are extensions safe to install? The VS Code Marketplace includes mechanisms like publisher verification and malware scanning, but it’s still good practice to check an extension’s download count, rating, and publisher before installing anything unfamiliar, especially ones with very few installs or reviews.
Do extensions slow down VS Code? A handful of well-maintained extensions have minimal impact, but installing many at once, or ones that are poorly optimized, can noticeably affect startup time and responsiveness — another good reason to keep your list intentional rather than exhaustive.
Can I use the same extensions across multiple computers? Yes — VS Code supports syncing your settings and installed extensions across devices when you sign in with a Microsoft or GitHub account, so your setup follows you rather than needing to be rebuilt from scratch each time you switch machines or reinstall your operating system.
What if two extensions conflict with each other? This does occasionally happen, most often between two formatters or two linters trying to control the same behavior. If formatting or linting starts behaving unpredictably after installing something new, disabling extensions one at a time is a reliable way to isolate which one is causing the conflict.
Quick-Reference VS Code Extensions Guide
- Language extension — install first, for whatever language you’re learning.
- Prettier — automatic, consistent code formatting on save.
- A linter (Pylance/ESLint) — catches likely mistakes before you run the code.
- Error Lens — surfaces errors inline, right on the offending line.
- GitLens — visual insight into your Git history, directly in the editor.
- Live Server — instant browser preview for HTML/CSS/JavaScript projects.
Conclusion
A small, deliberately chosen set of extensions covers nearly everything a beginner needs to make VS Code feel genuinely tailored to their work, without the overhead of managing dozens of tools that mostly go unused. Start with your language extension and Prettier, add a linter and Error Lens once you’re comfortable, and layer in GitLens or Live Server depending on what kind of projects you’re building.
With your editor, environment, and now extensions all covered, the Tools & Setup foundation from this series is essentially complete — the same setup habits apply directly to every new project and language you pick up from here.
In the next guide in this series, we’ll cover package managers — what they actually do, and why nearly every modern project relies on one.
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When not writing, Alex is probably debugging someone else’s code.