Is Email QR Generator free to use?

Yes. [Email QR Generator](/en/email-qr) is completely free with no registration required. All processing happens in your browser.

Do I need to install anything to use Email QR Generator?

No. [Email QR Generator](/en/email-qr) works directly in your browser — no downloads, plugins, or sign-ups needed.

Is my data safe when using Email QR Generator?

Yes. All data stays in your browser and is never sent to our servers. Nothing is stored or tracked.

email qr code communication mobile marketing

Email QR Code: mailto Setup, Templates, and Testing

mailto URI parameters, URL encoding rules, template vs freeform body strategies, email client compatibility, and QR density limits for print.

By Tools Hub Editorial Team·Published March 3, 2026·Time to read: 8 min

Go to tool

Email QR Generator

Generate an Email QR code with pre-filled recipient and subject.

Productivity

Go to tool →All articles

mailto: URI Format

The full mailto: URI supports multiple parameters:

mailto:[email protected]?subject=Hello&body=Message%20text&[email protected]&[email protected]

Parameters:

•to -- recipient address (required, part of the URI path)

•subject -- email subject line

•body -- pre-filled message body

•cc -- carbon copy recipients (comma-separated)

•bcc -- blind carbon copy recipients

URL Encoding Special Characters

Spaces, line breaks, and special characters must be URL-encoded:

•Space: %20

•Line break: %0A

•Ampersand: %26

•Hash: %23

•Question mark: %3F

Example: Invoice #123 becomes Invoice%20%23123.

Email QR Generator handles encoding automatically. If you build the URI manually, use JavaScript's encodeURIComponent() or an online encoder.

Multiple Recipients

To send to multiple people:

•Multiple To: mailto:[email protected],[email protected]

•CC: mailto:[email protected][email protected]

•BCC: mailto:[email protected][email protected] (useful for logging to a CRM inbox without the customer seeing it)

Be cautious with BCC in QR codes -- the recipient can see the full mailto: URI in their email client. For truly hidden logging, use server-side forwarding rules instead.

Template vs Freeform Body

Two strategies:

Template body (structured): Pre-fill the body with a form-like template:

Order number: ___
Issue type: ___
Description: ___

This gives you structured data that is easier to process.

Freeform body (open): Leave the body empty or with a minimal prompt: Describe your issue:. This is simpler but produces less consistent input.

For support and invoicing, use templates. For general feedback, freeform is fine.

Testing Across Email Clients

•Gmail (Android): handles mailto: well. Subject and body are pre-filled. CC/BCC work.

•Apple Mail (iOS): full support for all parameters.

•Outlook (mobile): works, but very long body text may be truncated.

•Samsung Email: reliable with mailto:.

Test your QR by scanning and verifying the email draft on at least 2 different email clients.

Character Limit for QR Complexity

A mailto: URI with address + subject + short body is typically 100-200 characters. This produces a manageable QR code. Beyond 300 characters, the QR becomes dense and needs to be printed at 4+ cm. Beyond 500 characters, scanning from a business card becomes unreliable. Keep subject + body concise.