Free Email Copy Audit
Test your email before you hit send
Paste your subject line and email body. Get an AI-powered audit across 7 dimensions — subject impact, hook, flow, CTA, personalization, scannability, and persuasion.
Free with Google or email. No credit card required.
What This Tester Evaluates
The Lytms email tester scores your email across 7 dimensions that predict open rates, read-through, and click-through. Each dimension receives a 1-10 score with specific feedback referencing your exact words.
How Email Scoring Works
Lytms evaluates your email as a complete unit — subject line, opening hook, body, and CTA working together. The AI model is trained on conversion email principles and calibrated to be deliberately strict. A 7.0 means your email is genuinely strong, not merely acceptable.
The tester evaluates your subject line at multiple truncation points: the full line, the 50-character mobile cutoff, and the 35-character preview pane. A subject line that scores well at full length but loses its meaning when truncated will receive a lower Subject Line Impact score because most recipients see the truncated version first.
Opening Hook scoring focuses on the first two sentences. The model evaluates whether the opening creates enough urgency or relevance to justify continuing. Emails that open with company news, pleasantries, or context-setting consistently score lower than emails that open with the reader's problem or a surprising insight.
Scannability is evaluated by analyzing paragraph length, use of formatting cues, and whether the key message can be extracted from bold text alone. Readers scan emails before deciding whether to read them. If a 5-second scan does not communicate the value and the ask, the email has a structural problem that no amount of copy polish will fix.
The interactive editor lets you iterate after scoring. Apply transforms like "Shorten 40%" to tighten verbose emails, "Plain English" to strip jargon, or "Benefit First" to restructure around the reader's outcome. Each rewrite is scored in real-time so you can measure improvement before sending.
Scoring email copy costs 2 credits — deliberately low so you can score every important email before it goes out. For teams that send campaigns regularly, this is the highest-leverage quality check available: catching a weak subject line before it reaches 50,000 inboxes saves more revenue than any amount of post-send analysis.
How to Improve Your Email Score
The difference between a 5.0 and a 7.5 email is usually 3-4 specific changes, not a complete rewrite. Here are five techniques that consistently raise email scores on Lytms.
Choose curiosity or specificity, never both
Subject lines that try to be both curious and specific end up being neither. "How we increased revenue (and what it means for your Q3 pipeline)" is too long and tries too hard. Pick one angle: "The Q3 pipeline problem" (curiosity) or "3 changes that doubled our pipeline in 90 days" (specificity).
Front-load the value in the first 5 words
Mobile email clients show 35-40 characters. Desktop shows 60-80. Your subject line needs to work at every truncation point. Put the most compelling word or number at the beginning: "41% lift from 3 CTA changes" not "We made 3 changes to our CTAs and saw a 41% lift."
Write the opening hook before the body
The first two sentences of your email carry disproportionate weight. Write them separately, before the rest of the email. They should answer one question: why should this specific person care right now? If the answer requires reading the whole email, the hook has failed.
Limit your email to one CTA
Emails with multiple CTAs dilute each other. Every additional link competes for the click. Choose the single most important action you want the reader to take, make it impossible to miss, and remove everything else that competes for attention. Secondary links belong in a footer, not the body.
Make the email scannable in 5 seconds
Bold the single most important phrase in each paragraph. Keep paragraphs to 2-3 sentences maximum. Use line breaks generously. A reader who spends 5 seconds scanning your email should be able to understand the offer, the proof, and the action without reading a single full paragraph.