Email Preheader Tester
Paste your subject and the first 200 characters of your email body. The tool shows what the inbox preview will look like in each client and flags the common preheader leak.
⚠️ No explicit preheader. body text is leaking into preview. Add a hidden div at the top of body to control this.
You checked one email. Outsolvi follows every one you send.
The analyzer looks at an email before it goes. Outsolvi shows what happened after: graded opens, clicks and replies for every email you send from Outlook or Gmail. From $7/user/mo billed yearly, 14-day free trial.
Track your next sendSimulates the preview window for Gmail (~90 chars), Outlook (~55 chars), Apple Mail iOS (~85 chars), Outlook mobile (~60 chars). Flags when no explicit preheader is set and the first body line leaks into preview.
Before sending. The preheader is the second-most-read piece of copy in an email (after the subject); rendering it wrong wastes the attention you paid for.
FAQ
How do I set an explicit preheader?+
Add a hidden div at the very top of the email body: `<div style='display:none;font-size:1px;line-height:1px;'>YOUR PREHEADER</div>` followed by enough zero-width-spaces to push body text past the preview cutoff.
Keep going
Articles, glossary entries, and other tools on the same topic.
Nate built Outsolvi after watching every email-tracking tool he had ever used lie to him about opens. Outsolvi grades every open as a person or a machine, in Outlook and Gmail, so the number on the dashboard is one a rep can actually act on.
We update these pages when the underlying mechanics change. new mailbox-provider rules, new tracker behavior, new measurement gaps. The dates above are real revisions, not auto-touches.