Base64 Tool

A small, private Base64 encoder and decoder that runs entirely in the browser.

Open the app

Desktop

Mobile

Features

• Encode plain text to Base64 in real time.
• Decode Base64 back to UTF-8 text.
• Handle Unicode characters correctly.
• Generate and accept URL-safe Base64.
• Copy results to the clipboard with one click.
• Move the current result back to the input field.
• Clear both fields instantly.
• Work well on desktop and mobile screens.

Privacy

All conversion happens locally in your browser. The app has no backend, sends no input to a server, and stores no conversion history. Anonymous page-view and performance telemetry does not include the content entered into the converter.

Technology

The application is built with Vue 3 and Vite. It uses Lucide icons, Web Analytics, and Speed Insights. Nginx serves the production build when running the Docker image.

Run locally

Install the dependencies and start the development server:

npm install
npm run dev

Vite will print the local development address in the terminal.

Run with Docker

docker compose up -d --build

The app will be available at localhost:8080. Stop it with:

docker compose down

Project structure

.
├── compose.yaml    # Local Docker Compose setup
├── Dockerfile      # Nginx container image
├── index.html      # Page structure
├── nginx.conf      # Static server and security headers
├── public/          # Static assets and application icon
├── src/             # Vue application and conversion logic
├── styles.css       # Responsive interface styles
└── vite.config.js   # Vite and Vue configuration

Security headers

The included server configurations set a restrictive Content Security Policy and disable access to the camera, microphone, and geolocation. They also prevent framing and MIME-type sniffing.

Browser support

The app works in current versions of Chrome, Firefox, Safari, and Edge. It relies on standard browser APIs including TextEncoder, TextDecoder, and the Clipboard API.