Ternloop tools
Free email tools
Prepare your next email. No account required.
HTML email preview
Preview email HTML on desktop and mobile, switch appearance, and inspect sender, subject, and preheader.
Open toolSubject line tester
Check subject length, readability, punctuation, capitals, and emoji with simulated inbox previews.
Open toolEmail spam checker
Review email copy, links, images, and formatting for potential spam signals before sending.
Open toolHTML email inliner
Inline embedded CSS, compact your email HTML, and check its size against Gmail clipping limits.
Open toolEmail signature generator
Build a professional email signature with contact details, a logo, and social links, then copy its HTML.
Open toolUTM link builder
Create campaign tracking links while preserving existing URL parameters and fragments.
Open toolHTML to plain text converter
Convert email HTML into readable text with lists, image descriptions, and optional link destinations.
Open toolMailto link generator
Build an encoded email draft link with recipients, subject, and message body.
Open toolEmail ROI calculator
Calculate campaign return, net revenue after campaign cost, and revenue per dollar spent.
Open toolEmail bounce rate calculator
Measure hard, soft, and total bounce rates using your actual campaign message counts.
Open toolBuild a stronger email foundation
Pair a clear message with correctly configured authentication and a healthy sending practice.
Your next campaign, with Ternloop
Turn a useful idea into an email worth sending.
Write newsletters, organize your contacts, schedule campaigns, and follow results in one workspace. Start free with an included sending domain.