Try a draft at spotzee.com/tools/email-subject-score.
What the score includes
The scorer checks Flesch Reading Ease, Flesch-Kincaid grade, character and word counts, sentiment,RE and FWD occurrences, the word free, listed spam words, exclamation marks, all-capital words, punctuation, [FNAME], and emoji. Each signal contributes up to 10 points. The result includes obtainedScore, totalCritereaScore (140), finalScorePercentage, and finalIndividualScore.
The preferred ranges come from the scorer’s rules. For example, it awards full points for 38–53 characters and six to eight words. A low score identifies a mismatch with those rules. It does not show whether a mailbox provider accepted the message or whether recipients opened it.
Score a subject line
1
Enter your draft
Submit the subject line, including any punctuation, emoji, or
[FNAME] token you plan to use.2
Review the breakdown
Inspect each signal’s
actualValue and score in finalIndividualScore before revising the text.3
Test your revision
Score the revised line again and compare the signals. Confirm the final wording and personalisation token match your sending platform.
[FNAME] signal recognises that exact token. If your sending platform uses another format, test with [FNAME] only as a scoring proxy and restore your platform’s token before sending.
For alternatives to your draft, see the subject line suggester. The scorer is also available through the Spotzee Extended API; see pricing for the current API rate.