DEV Community

The Practical Developer
The Practical Developer

Posted on Edited on Originally published at practicaldevblog.blogspot.com

Tauri Explained: Tiny Desktop Apps From Web Code

#tauri #tools #beginners #programming

Introduction

Electron put web developers on the desktop, at the cost of shipping a whole Chromium browser inside every app, with large downloads and heavy memory use. Tauri, released in 2020, offers the same promise with a fraction of the weight: build desktop apps from web frontend code, but use the operating system's own webview for rendering and a Rust backend for system access. The result is apps measured in megabytes, not hundreds of megabytes, with a security model designed around least privilege.

Webview frontend, Rust backend, and capabilities

Tauri splits the app like Electron does, but with different pieces:

  • Frontend: any web framework (React, Vue, Svelte, or plain HTML) running in the system's webview: WebKit on macOS, WebView2 on Windows, WebKitGTK on Linux. No bundled Chromium.
  • Backend: Rust code that handles system access: files, windows, menus, notifications, and shell commands, exposed to the frontend through a command API.
  • Capabilities: a permission system: the frontend can only call backend commands the app explicitly allows, in a config file, so a compromised frontend cannot freely access the system. This allowlist is Tauri's security headline versus Electron's broader default access.
  • Tiny output: because the webview is the system's, a Tauri app is typically a few megabytes, starts fast, and uses far less memory than the equivalent Electron app.

A frontend call to the backend shows the shape: invoke a Rust command by name from JavaScript:

import { invoke } from "@tauri-apps/api/core";
const greeting = await invoke("greet", { name: "Waqas" });
console.log(greeting);
Enter fullscreen mode Exit fullscreen mode

The Rust side defines greet, Tauri wires it up, and the frontend treats it like any async function, with the capability config deciding what is allowed.

The honest trade

Tauri's trade is maturity and platform quirks: its ecosystem is younger than Electron's, webview differences across operating systems can bite (a feature working on one platform's webview, not another's), and Rust backend code is a learning curve for pure web teams. Some apps also need Chromium-specific features the system webview lacks. Tauri suits cases where app size, memory, and security matter and the frontend is standard web tech, while Electron suits cases where you need Chromium guarantees, the largest plugin ecosystem, or a team with no Rust appetite.

Tiny apps, from web code

Tauri is tiny desktop apps from web code: a system webview for the UI, a Rust backend for system access, and a capability allowlist guarding the boundary. It trades Electron's maturity for apps a fraction of the size, and for many desktop apps, that fraction is the whole argument.

Originally published at https://practicaldevblog.blogspot.com/2026/10/tauri-explained-tiny-desktop-apps-from.html

Top comments (0)