Email subject line generator: enter your campaign topic and get 5 subject lines under 60 characters using five proven open-rate patterns. Free to use.
Generates five email subject line variants optimized for open rates from your campaign topic and tone.
How it works
Enter the email's main topic, the offer or news, and your target audience.
Choose a preferred tone and flag any patterns to emphasize — urgency, curiosity, or benefit-first.
Five subject-line variants appear, each under 60 characters with a paired preview text suggestion.
One-click copy of subject line plus preview text. Paste directly into your ESP.
Who it's for
Performance marketers running A/B tests
Founders writing their own copy
Agencies producing bulk content for clients
Why i10X
One plan. Every AI. No tool-switching.
GPT-5, Claude 4.8, Gemini 3 Pro, Grok — always the latest versions. Switch between them for different tasks without leaving the workspace.
Draft an employment contract next, then run your privacy policy through the GDPR checker — same tab, same subscription.
ChatGPT Plus, Claude Pro, and Gemini Advanced separately cost $60+/mo. Add document and legal tools and cost multiplies fast. i10X bundles everything.
Chain agents into workflows: new partnership inquiry → NDA auto-generated → e-signed via integration → stored in your workspace.
Use cases
Get five distinct angles in one run so you can ship a real test instead of two slight rewordings of the same idea.
Generate a month of variants in an afternoon. Drop them into your scheduler and free your team for strategy work.
Use the variants as a starting point, not a final, so your team has direction and you don't pay for a blank-page tax.
Frequently asked questions
Ready to keep going?
Unlock all of them — plus ChatGPT, Claude, Gemini, and Grok — in one workspace. Most users save $300+/mo on subscriptions.