Mailto link generator

A mailto link is a URL that starts with mailto: instead of https:. When clicked, the browser hands it to the reader's default mail app with the recipient, subject, and body already filled in. The recipient goes right after mailto:, and every other field travels as a query parameter: subject, body, cc, and bcc.

Because the values live in a URL, they must be percent-encoded. A literal space, ampersand, or question mark in the subject will cut the link short or corrupt the fields in some clients. Encoding is the part people most often get wrong by hand, and it is the main reason to generate the link instead of typing it.

Transactional email footers commonly use mailto links for reply-to-support flows, since a pre-filled subject like Order 4821 support request routes the reply without a form. In product notifications they work well for feedback prompts and escalation paths.

Keep the pre-filled body short. Some clients truncate long mailto bodies, and mobile mail apps vary in how much of the URL they honor. If you need more than a few lines of context, link to a form instead.