Free Chrome Extension

Create Fastmail Masked Emails in Just Two Clicks

Stop navigating to Fastmail settings every time you need a masked email. Generate disposable email aliases instantly from any webpage.

Install from Chrome Web Store View Source
Fast Masked Mail Creator extension popup showing masked email creation

What is Fastmail Masked Email?

Masked emails are unique, randomly-generated addresses that forward to your real inbox. Use them when signing up for services to protect your privacy and control spam.

Privacy Protection

Each service gets a unique address. If one leaks, your real email stays safe.

Spam Control

Getting unwanted mail? Disable or delete the masked address instantly.

Easy Management

See exactly which service shares your data by tracking which address is used where.

Why This Extension?

Creating a masked email through Fastmail's settings is cumbersome — you have to navigate away from the page you're on, open settings, create the address, copy it, and go back.

This extension fixes that. Two clicks and you have a fresh masked email copied to your clipboard, right where you need it.

💡 Perfect if you use Chrome's built-in password manager instead of 1Password or Bitwarden — which already bundle Fastmail masked email integration.
Extension showing a newly created masked email address

How It Works

1

Generate an API Token

Create a Fastmail API token with only the "Masked Email" scope in your Fastmail settings.

Step 1: Generate an API Token
2

Install the Extension

Get it for free from the Chrome Web Store and paste your API token when prompted.

Step 2: Install the Extension
3

Create Masked Emails

Click the extension icon, hit create — your new masked email is ready and copied to clipboard.

Step 3: Create Masked Emails

Privacy & Security

Your security is the whole point. Here's how the extension keeps your data safe.

Stored Locally

Your API token never leaves your browser's local storage.

No Data Collection

Zero analytics, zero tracking, zero telemetry.

Open Source

Full source code available on GitHub for anyone to audit.

Minimal Scope

Only requests the 'Masked Email' API permission.

Ready to simplify your email workflow?

Install Fast Masked Mail Creator and start protecting your inbox today.

Install from Chrome Web Store