Mailto Link Generator

A mailto link is a special type of HTML hyperlink that opens the user's default email client (such as Gmail, Outlook, Apple Mail, or Thunderbird) with a pre-filled recipient address, subject line, CC, BCC, and body text. When a visitor clicks a mailto link, their device automatically launches the associated email application and populates the message fields based on the parameters in the URL. The basic syntax follows RFC 6068: mailto:email@example.com?subject=Hello&body=Message. It's one of the simplest ways to add contact functionality to a website without requiring a backend server.

Yes! You can specify multiple recipients in the To, CC, and BCC fields by separating email addresses with commas. For example: mailto:alice@example.com,bob@example.com will send the email to both Alice and Bob. The same comma-separated format works for CC and BCC parameters: ?cc=cc1@example.com,cc2@example.com&bcc=bcc@example.com. Note that commas inside parameter values should be URL-encoded as %2C for strict standards compliance, though most modern email clients handle unencoded commas without issues. Our generator handles all encoding automatically.

Use the subject and body query parameters in the mailto URL. The subject parameter sets the email's subject line, and the body parameter pre-fills the message body. Both values must be URL-encoded to handle spaces, special characters, and line breaks correctly. For example, spaces become %20 and line breaks become %0D%0A (CRLF) for maximum compatibility across email clients. Our tool automatically applies proper URL encoding using encodeURIComponent(), so you don't need to worry about manual encoding. Simply type your content naturally, and we handle the rest.

Mailto links are supported by all major browsers, including Chrome, Firefox, Safari, Edge, and Opera, on both desktop and mobile platforms. However, the behavior depends on whether the user has a default email client configured on their device. On desktop, clicking a mailto link typically opens the system's default email application (Outlook, Apple Mail, etc.). On mobile devices, it usually opens the native mail app or prompts the user to choose an email client. If no email client is set up, the link may appear to do nothing. For this reason, many websites supplement mailto links with contact forms as a fallback, ensuring visitors can always reach you regardless of their device configuration.

Email addresses exposed in plain HTML mailto links can be harvested by spambots. Here are several effective protection strategies:

1. HTML Entity Encoding: Replace characters like @ with @ and . with .. Browsers render these correctly, but many simple scrapers miss them.
2. JavaScript Obfuscation: Dynamically build the mailto link using JavaScript, so the raw email address never appears in static HTML.
3. Contact Forms: Use a server-side contact form instead of (or alongside) a mailto link to completely hide the email address.
4. reCAPTCHA Protection: Add a CAPTCHA challenge before revealing the email address.
Our generator includes an anti-spam toggle that automatically applies HTML entity encoding to your mailto link for basic protection.

While mailto links are convenient, they have several limitations to keep in mind:

• URL Length: Most browsers and email clients handle mailto URLs up to ~2,000 characters reliably. Exceeding this may cause truncation or errors.
• No Attachments: Mailto links cannot include file attachments natively (though some clients support experimental attachment parameters, it's not widely supported).
• No HTML Formatting: The body parameter only supports plain text. You cannot include rich HTML formatting, images, or styled content.
• Client Dependency: The link only works if the user has an email client configured. On public computers or kiosks, it may fail silently.
• Spam Exposure: Raw mailto links make email addresses visible to scrapers (mitigated with encoding or JavaScript).
• Character Encoding: Special Unicode characters may not render correctly across all email clients.

Both have their place, and the best approach is often to use both together:

Mailto Links — Best For: Simple, low-friction contact options; personal blogs and portfolios; quick feedback; situations where you want to minimize development complexity; and when you want users to have a copy of the sent message in their own email client's sent folder.

Contact Forms — Best For: Business and e-commerce websites requiring structured data; spam prevention with CAPTCHA; file uploads; automatic CRM integration; consistent formatting; and situations where you need to track and log all inquiries in a database.

A common pattern is to provide a mailto link as a quick option alongside a more comprehensive contact form, giving users the choice based on their preference and device capabilities.

Mailto links are standard HTML anchor elements and can be styled just like any other link using CSS. Here are some common approaches:

Button Style: Apply class="btn" (Bootstrap) or style with padding, background-color, and border-radius to make the link look like a clickable button.
Icon Integration: Use Font Awesome or similar icon libraries: <a href="mailto:..."><i class="fas fa-envelope"></i> Email Us</a>
Hover Effects: Add transitions, color changes, or underline animations on hover.
Custom Cursor: The default pointer cursor applies automatically to all links.
You can also use CSS attribute selectors to specifically target mailto links: a[href^="mailto:"] { /* styles */ } — this lets you style email links differently from regular navigation links.