Email subject line analyzer
The subject line decides whether your campaign gets opened or ignored. Paste yours and get a score with concrete recommendations, instantly and with no sign-up.
The analysis runs 100% in your browser: we don't store or send what you type.
What this tool checks
We evaluate the factors that most influence open rates and keeping your email out of spam: length (the ideal range is 30 to 50 characters so it displays fully on mobile), words that trigger filters, use of capital letters and exclamation marks, emojis, and personalization with the contact's name.
A great subject line isn't enough if you don't reach the inbox
Even if the subject line is perfect, if your domain isn't authenticated your campaigns can still land in spam. Check your domain with the SPF/DKIM/DMARC checker and read why emails land in spam.
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