What Is Preheader Text and Why Does It Matter?
Preheader text is the short snippet of copy that appears alongside or below the subject line in most email clients. It is often pulled from the first line of the email body, but savvy marketers set it explicitly via a hidden HTML element. This text serves as a secondary hook, giving recipients a glimpse of the email's content before they open it. In many inboxes, the preheader is visible on mobile and desktop, making it a critical element of the email's first impression.
In the creative process, preheader text is part of the message hierarchy. While the subject line grabs attention, the preheader reinforces or expands the promise, urgency, or curiosity. It can be used to preview a key benefit, create a sense of exclusivity, or add a call to action. Because it appears in the inbox alongside the subject line, it effectively doubles the space you have to persuade someone to open.
How Should You Write Preheader Text?
Effective preheader text should be concise (typically 40–130 characters), complementary to the subject line, and actionable. Avoid repeating the subject line verbatim; instead, use it to add new information or a different angle. For example, if the subject line is "Your 20% off code inside," the preheader could read "Shop our new arrivals — ends Friday." This combination provides both a reason to open (discount) and a sense of urgency (time limit).
Common mistakes include leaving the preheader blank (which often defaults to "View this email in your browser" or other unhelpful text), stuffing it with keywords, or making it too long so it gets truncated. Also, avoid using the same preheader for every email; tailor it to the specific campaign and segment.
Where Does Preheader Text Fit in the Creative Workflow?
Preheader text is typically written during the copywriting phase, alongside the subject line and body copy. It should be tested as part of your message testing process, as small changes can significantly impact open rates. Many email marketing platforms allow you to set a custom preheader in the campaign settings. For best results, coordinate with the subject line to create a cohesive two-line preview that tells a mini-story or highlights a single compelling offer.
In the broader content strategy, preheader text is a tactical element that supports the creative platform and brand voice. It must align with the tone of voice and the overall campaign idea. For instance, a playful brand might use a witty preheader, while a luxury brand might keep it elegant and minimal.
Example: Subject line: "Your free guide to better sleep"
Preheader: "Download the 5-step routine doctors recommend."
This combination clearly states the offer and adds credibility, increasing the likelihood of an open.