Small tools.
Better email workflows.
Check your copy, preview your preheader, build links, and plan your inbox. Free to use, no account needed. Tool inputs stay in your browser.
Email subject line checker
Check subject length, word count, and distracting emphasis before you send.
Open tool →Newsletter UTM link builder
Create tagged campaign links for newsletter attribution without a spreadsheet.
Open tool →Newsletter volume calculator
Estimate incoming email volume before setting up a research or testing inbox.
Open tool →Newsletter reading time calculator
Count words and estimate how long your newsletter takes to read before sending.
Open tool →Mailto link generator
Create an email contact link with a prefilled subject and message. No signup needed.
Open tool →Email preheader preview tool
Review your subject and preview text together with adjustable illustrative truncation.
Open tool →Build a workflow around the tools
Our practical guides explain how to organize research, test email workflows, and keep campaign naming consistent.