None of these five extensions is strictly required, and none is a universal must-have. Each one removes a kind of friction that most people hit early in VS Code: language tooling that is missing until you add it, formatting that drifts between files, bugs that surface only at runtime, pull requests that have to be reviewed outside the editor, and AI suggestions that you may or may not want. The shortlist below is an editorial selection built around those problems, not a ranking of the best extensions. Which ones belong on your machine depends on the languages you write, the host where your code lives, and whether you want AI assistance at all.
What “fundamental” means in this list
For this article, a fundamental capability is one that many developers reach for in their first weeks with VS Code because it makes ordinary editing, quality checks, language work, collaboration, or coding assistance noticeably easier. That is a judgment call. Microsoft’s own overview says that exact language features depend on what is built in and what extensions add, so the same editor can feel very different on two machines. The guide to using extensions in Visual Studio Code describes extensions as the way the editor gains new languages, debuggers, and tools.
The five picks
1. Python (Microsoft)
The Python extension turns VS Code into a fuller Python workflow, covering IntelliSense, linting, debugging, testing, and selecting the environment your code runs in. It does not include the Python interpreter. You install that separately, and the extension then needs to be pointed at it. If you do not write Python, this extension is irrelevant; for those who do, it is close to essential. See Python in Visual Studio Code for the setup details.
2. Prettier – Code formatter
A formatter changes the layout of code, such as spacing, line breaks, and quoting, to improve readability without changing what the program does. That is different from linting, which checks for likely mistakes and rule violations. Prettier is most useful when a team wants every contributor’s files to look the same without arguing about it in review.
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The main risk is stacking formatters. Set one default formatter per language and let the project’s configuration decide the rest:
- Open Settings with Ctrl+, (Windows or Linux) or Cmd+, (macOS).
- Search for Default Formatter and choose Prettier for the languages you use it with.
- Search for Format On Save and enable it, so formatting runs automatically when you save.
- Commit the project’s formatter configuration so teammates get the same output.
3. ESLint
ESLint is a linter. It flags patterns that are likely bugs or that break a project’s rules, which is a different job from formatting. It is most relevant to JavaScript and TypeScript projects that already have an ESLint configuration. Without that configuration, installing the extension mostly produces noise. Some ESLint rules overlap with formatting decisions, so if you use both Prettier and ESLint, make sure the lint rules do not fight the formatter. VS Code’s documentation on extension recommendations uses Prettier and ESLint together as a workspace example, which is a reasonable pairing for web projects but not a requirement.
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4. GitHub Copilot
GitHub Copilot adds code suggestions and a chat interface inside VS Code. Its value depends on two things: whether you want AI assistance, and whether you can use the GitHub account and Copilot service that it requires. Plans and availability are set by GitHub and change over time, so check the current terms before you rely on it. The official Copilot setup guide for VS Code also explains how to turn AI features off if you prefer not to use them. Writing good code does not require Copilot.
5. GitHub Pull Requests
This is the collaboration pick, and it matters only if your repositories are hosted on GitHub. It brings pull request work into the editor rather than the browser. Microsoft’s extension documentation references the GitHub Pull Requests extension’s settings, but the feature set changes with releases. Confirm what the current version does on its Marketplace page before you plan a workflow around it.
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What VS Code already gives you
The “should be built in” argument is easier to test once you separate what the editor already ships from what extensions add. VS Code includes Git support and several language capabilities, and extensions cover other languages and tools. That split explains most of the list. Git basics are already there, so the GitHub Pull Requests extension is about hosted review, not version control itself. Python, by contrast, depends on language tooling that Microsoft ships as an extension.
Comparing the five at a glance
| Candidate | Best fit | Built into VS Code | Setup requirement | Overlap to watch |
|---|---|---|---|---|
| Python (Microsoft) | Python projects | Not stated as built in; language tooling comes from the extension | Python interpreter installed separately | Other Python linters and formatters, such as Ruff or Black |
| Prettier – Code formatter | Teams that want consistent formatting | Not built in; formatter choice is yours | Project formatter configuration | Any other formatter that handles the same file types |
| ESLint | JavaScript and TypeScript projects with an ESLint configuration | Not built in | Project ESLint configuration | Lint rules that conflict with formatting |
| GitHub Copilot | Developers who want AI suggestions and chat | Not built in | GitHub account and Copilot access | Not stated; it can be turned off |
| GitHub Pull Requests | Repositories hosted on GitHub | Git support is built in; hosted pull request review is not stated as built in | GitHub account with access to the repository | The GitHub web interface for the same reviews |
Why “built in” is harder than it sounds
Putting a capability into the editor by default sounds simple, but it creates decisions that extensions avoid. Each of the following is an editorial trade-off, not a Microsoft position:
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- Default choices. A built-in formatter would have to pick one style. Teams that already use another style would need to override it.
- Language-specific maintenance. Python, JavaScript, and TypeScript tooling change at different speeds. Shipping them all in the core editor would tie every update to one release cycle.
- Startup and footprint. Extensions can be disabled per workspace. Built-in features cannot be removed as easily.
- Competing ecosystems. Developers often rely on tools that the editor’s default would not match, so a built-in choice would be the wrong one for some users.
Python-centered alternatives
If your work is mostly Python, you can swap the JavaScript tools for Python formatters. Microsoft’s Python formatting documentation lists Ruff and Black as formatter extensions, and also covers autopep8 and yapf. Formatting and linting overlap somewhat but are complementary, so a common setup pairs one formatter with one linter rather than two formatters on the same file. The Python extension’s own linting still applies alongside whichever formatter you choose.
Installing safely
Open the Extensions view with Ctrl+Shift+X (Windows or Linux) or Cmd+Shift+X (macOS), search for the extension, and check its detail page before installing. The page shows the publisher, feature contributions, changelog, and dependencies. You can also install a VSIX package directly if your organization distributes extensions that way. Before you install, check:
- The publisher’s identity, and that it matches the vendor you expect.
- Whether the extension fits your language, project, and repository host.
- Its dependencies, such as an interpreter or a service account.
- The changelog, to see whether the extension is still maintained.
Starting with VS Code 1.97, Microsoft’s extension guide says third-party extensions trigger a publisher-trust confirmation. Extensions have the same permissions as VS Code itself, so that prompt deserves a read. A Marketplace listing does not make an extension risk-free. The Extension Marketplace documentation covers the detail page and recommendation features in full.
For the official overview of VS Code itself, see the Visual Studio Code homepage.
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