What Is Preview Text and Why Does It Affect Open RatesUpdated 7 days ago

Preview text is the short line of text that appears in the inbox directly beside or below the subject line — visible before the email is opened. It is the second opportunity to earn the open after the subject line created the first impression.

Most email senders ignore preview text entirely and let the email client auto-populate it from the first line of the email body — which typically ends up as "View this email in your browser" or a blank space. Neither earns an open.

Preview text used correctly extends the subject line rather than repeating it:

If the subject creates curiosity — the preview answers enough to make opening feel worthwhile without giving everything away.

If the subject makes a promise — the preview adds a specific detail or names the exact benefit waiting inside.

If the subject targets a specific situation:

• Subject: "The product your skin has been asking for"
• Preview: "Now in three formulas — find yours inside"

Together the subject and preview occupy roughly 80 to 100 characters of visible inbox space on most mobile screens. That combined space is the entire deciding factor between an open and an archive. I write both together every time — treating them as one combined headline because that is exactly what they are in the reader's experience of the inbox.