Free Email Tools

Professional-grade tools to improve your email deliverability, test your campaigns, and optimize your cold outreach. All completely free.

⭐ NEW

ChatGPT Cold Email Generator

Generate personalized cold emails using AI in seconds. Enter prospect details and get a ready-to-send email written by ChatGPT with the AIDA framework.

  • AI-powered personalization using GPT-4o-mini
  • AIDA framework for high conversion
  • Professional, casual, or direct tones
  • Copy-to-clipboard for easy use

Email Subject Line Tester

Score your subject line in real time. Get a spam check, iPhone & Gmail mobile preview, power word detection, personalization token analysis, and predicted open rate.

  • Predicted open rate score (0–100)
  • Mobile preview: iPhone lock screen & Gmail
  • Spam trigger & power word highlighter
  • Personalization token & emoji detector

Email Warmup Timeline Calculator

Find out how many inboxes you need and how long warmup takes. Enter your target volume and domain age to get a week-by-week schedule with risk level and warnings.

  • Inboxes needed (based on 30 emails/inbox/day max)
  • Week-by-week warmup schedule per inbox
  • Risk level indicator: safe, moderate, aggressive
  • Warnings for new domains and unrealistic targets

Cold Email Spam Checker

Scan your subject line and email body for spam trigger words that hurt deliverability. Get instant feedback and improve your inbox placement rates.

  • Highlights 100+ spam trigger words
  • Checks formatting issues (CAPS, exclamations)
  • Provides spam risk score (0-100)
  • Real-time analysis as you type

DMARC & SPF Generator

Generate DNS records to authenticate your domain and improve email deliverability. Works with Gmail, Outlook, Zoho, and custom providers.

  • Instant SPF record generation
  • DMARC policy configuration
  • Support for all major email providers
  • Copy-paste ready DNS records

Cold Email ROI Calculator

Calculate exactly how much revenue you are losing due to low open rates and generic emails. See your potential ROI with optimized deliverability.

  • Calculate monthly revenue potential
  • Compare current vs optimized performance
  • Adjust open rate, reply rate, and deal value
  • See the cost of inaction in real-time
Start free • Upgrade to send

Ready for Advanced Email Outreach?

Get unlimited AI personalization with your own API key, automated website data fetching, and smart campaign scheduling with inbox rotation.

Free Email Tools | WarmOpener