Free Tools
Tools that ship faster.
Free, fast, no signup. Built for email senders who want answers in seconds, not signups.
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Subject Line Generator
Generate 20+ proven subject line variations from a topic - free, no signup.
Open tool FreeSpam Checker
Paste your subject + body. We flag the spam triggers that hurt your inbox rate.
Open tool FreeHTML Email Preview
Paste your HTML email and preview it instantly in a sandboxed frame.
Open tool FreeSend-Time Calculator
Find the best send time for your audience across timezones.
Open tool