📏 Length Optimizer

Email Character Counter

Count characters and words for your subject line, preheader text, and email body in real time. Get length scores and recommendations to maximize deliverability and engagement.

Live character count
Subject + preheader + body
Reading time estimate
Length score & tips
📬 Subject Line
0 / 50
Characters: 0 Words: 0 —
💡 Ideal subject line: 30–50 characters, 6–10 words. Keep key info in the first 40 characters for mobile.
👁 Preheader Text (preview shown after subject in inbox)
0 / 100
Characters: 0 —
💡 Ideal preheader: 85–100 characters. This is prime real estate — use it to tease the email content and boost open rates by up to 30%.
📄 Email Body
0
Characters
0
Words
0
Sentences
0s
Read Time
💡 Marketing emails: 200–500 words. Cold emails: under 150 words. Newsletters: up to 800 words.

📐 Email Length Reference Guide

ElementIdealAcceptableToo Long
Subject Line30–50 chars51–60 chars61+ chars
Preheader Text85–100 chars40–84 chars101+ chars
Cold Email Body75–150 words151–200 words200+ words
Marketing Email200–500 words500–800 words800+ words
Newsletter400–800 words800–1200 words1200+ words

Frequently Asked Questions

How many characters should an email subject line be? +
The ideal email subject line is 30–50 characters. Mobile devices show ~40 characters before cutting off. Keep your most important words in the first 40 characters. Avoid going over 60 — most of your audience opens on mobile.
What is the ideal preheader text length? +
Aim for 85–100 characters. Preheader text is the second line of text shown in the inbox preview after the subject line. It's prime real estate — a good preheader can lift open rates by 20–30% on its own.
How long should a marketing email be? +
For promotional emails, 200–500 words is the sweet spot. Cold outreach emails should stay under 150 words — short and direct. Newsletters can go up to 800 words if the content is genuinely valuable.

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