Electron.js Desktop Apps — A Complete Guide for Teams in 2026

Electron.js is a framework that lets you build desktop applications for Windows, macOS, and Linux using web technologies — HTML, CSS, and JavaScript. It does this by bundling two well-maintained open-source projects: Chromium for rendering and Node.js for system access.

The result is a runtime that gives your application a browser-quality rendering engine and full filesystem, network, and OS API access at the same time. The trade-off is that you are shipping a bundled browser, which makes Electron apps heavier than native alternatives.

Who uses Electron in production:

• Visual Studio Code — arguably the most used code editor in the world
• Slack and Discord — two of the largest real-time messaging platforms
• Figma desktop — professional design tool
• GitHub Desktop — official GitHub client
• 1Password — security-critical password manager

These are not toy apps. They serve tens of millions of users. The "Electron apps are slow" criticism was valid in 2018; in 2026, a well-built Electron app is indistinguishable from a native app for most users.

The most important concept in Electron development is the main process / renderer process split. If you do not understand this, you will build insecure or broken apps.

Main process:

• Runs in Node.js
• Has access to the filesystem, native OS APIs, application lifecycle, and native menus
• There is exactly one main process per Electron application
• Manages the creation and lifecycle of browser windows (renderer processes)

Renderer process:

• Runs in Chromium — it is a browser window
• Handles all UI rendering using web technologies (React, Vue, or plain HTML)
• There can be multiple renderer processes (one per window)
• Should NOT have direct access to Node.js APIs in a secure app

IPC (Inter-Process Communication):

• The main and renderer processes communicate via IPC
• The correct pattern since Electron 12 is contextBridge with a preload script
• The preload script runs in a privileged context and exposes a typed API to the renderer
• Never use nodeIntegration: true in a renderer — this is a security vulnerability

A concrete example:

// preload.ts
contextBridge.exposeInMainWorld('api', {
  readFile: (path: string) => ipcRenderer.invoke('read-file', path),
  saveFile: (path: string, content: string) => ipcRenderer.invoke('save-file', path, content),
})

The renderer calls window.api.readFile(path) and never touches Node.js directly. The main process handles the actual file system operation. This boundary is what makes Electron apps secure.

Electron security has improved dramatically since version 12, but only if you follow the security model. These are the rules:

1. Never enable nodeIntegration: true This allows any code running in the renderer (including XSS-injected code) to call require('fs'), require('child_process'), and anything else in Node.js. It is a critical vulnerability.

2. Always enable contextIsolation: true (this is the default since Electron 12) Context isolation separates the preload script's context from the renderer's JavaScript context. This means window.electronAPI exposed via contextBridge is the only bridge between worlds.

3. Use contextBridge.exposeInMainWorld for everything Never use ipcRenderer directly in renderer code. Always go through a typed contextBridge API.

4. Validate everything in the main process The main process is the gatekeeper. Validate all paths, permissions, and inputs before acting on IPC messages from the renderer.

5. Load remote content carefully If you load third-party URLs in a webview, use sandbox: true and disableNodeIntegration: true on the webview. Never load remote content in the main window with Node.js integration.

6. Sign and notarise releases Unsigned apps are blocked by macOS Gatekeeper and trigger Windows SmartScreen. Code signing with an Apple Developer certificate + notarisation, and an EV/OV code signing certificate for Windows, is mandatory for user-facing distribution.

One of the most underrated advantages of Electron over web apps is the ability to deliver a controlled, versioned release to users. One of the most underrated operational costs is managing that release pipeline correctly.

electron-updater (part of electron-builder) is the standard solution. It supports:

• GitHub Releases as a free update server for open-source or small-scale apps
• Private S3 bucket for enterprise apps
• Differential updates to minimise download sizes

A typical update flow:

1. New version is built and signed in CI (GitHub Actions)
2. Artifacts are published to GitHub Releases or S3
3. Running app checks for updates on startup (or on a schedule)
4. Update is downloaded in the background
5. User is prompted to restart, or the update installs silently on next launch

This pattern means you can fix a bug and have it in front of all users within hours, not days.

Versioning conventions:

• Use semantic versioning (MAJOR.MINOR.PATCH)
• Use a beta channel for pre-release builds
• Do not publish a release without testing the update flow itself — it is easy to ship a build that cannot update itself

Tauri is a newer desktop framework that uses the OS's native web renderer (WebKit on macOS, WebView2 on Windows, WebKitGTK on Linux) instead of bundled Chromium, and Rust for the backend instead of Node.js.

Tauri advantages:

• Much smaller binary: a Tauri app is typically 2-10 MB vs 80-200 MB for Electron
• Lower memory usage: no bundled Chromium
• Rust backend: memory-safe, fast, and no garbage collector pauses

Tauri disadvantages:

• Requires learning Rust for any native functionality beyond the standard Tauri plugins
• Rendering inconsistency: using the OS's native renderer means subtle rendering differences between platforms — the same app looks slightly different on Windows vs macOS
• Smaller ecosystem and community than Electron
• Fewer native APIs exposed out of the box; more features require writing Rust plugins

When to choose Tauri over Electron:

• Binary size is a hard requirement (installer size matters for your users)
• You have Rust expertise on the team
• Memory footprint is critical (embedded systems, older hardware)

When to choose Electron over Tauri:

• You want pixel-perfect rendering consistency across all platforms
• Your team is in JavaScript/TypeScript and does not want to introduce Rust
• You need the maximum native API surface that Electron exposes
• You need the most mature tooling (electron-builder, auto-updater, Playwright-Electron testing)

For most product teams in 2026, Electron remains the lower-risk default. Tauri is excellent but adds Rust as a dependency; if your team is already Rust-capable, the trade-off is worth evaluating.

Need help deciding? Talk to us — we build both.