Free tools for cold email
Instant tools for checking deliverability, scoring subject lines, and improving cold email performance — no account required.
Email Spam Checker
Paste your subject line and email body. Get an instant spam score, a breakdown of every flagged trigger, and specific fixes — updated in real time as you type.
Subject Line Tester
Score your subject line across 12 deliverability factors. Preview it at desktop and mobile lengths, see Gmail tab placement, and generate AI-powered alternatives with one click.
DNS Health Checker
Enter any domain and check SPF, DKIM, DMARC, and MX records in real time. Know whether your domain is configured to deliver before your first campaign sends.
Check your domain →
Cold Email ROI Calculator
Input your list size, open rate, reply rate, close rate, and average deal value. Get projected meetings booked, pipeline value, and revenue estimate instantly.
Calculate your ROI →
Spintax Generator
Paste any sentence and get instant spintax variations wrapped in {option1|option2|option3} syntax. Ready to paste directly into your campaign sequences.
Generate spintax →
Email Warmup Calculator
Enter your inbox age and target send volume. Get a day-by-day warmup schedule showing exactly how many emails to send each day to safely build sender reputation.
Calculate warmup →
Email Blacklist Checker
Enter your domain or IP address and check your status across 10 major email blacklists instantly. Every listed result includes a direct link to the removal request page.
Check your domain →
Cold Email Send Time Optimizer
Select your prospect's industry and timezone. Get data-backed recommended send windows — the days and hours that consistently produce the highest open rates for that audience.
Find your best send time →
Cold Email Template Generator
Enter your ICP, your offer, and your goal. Get a complete subject line and email body — spam-scored, with spintax variations built in, ready to paste into your campaign.
Generate a template →
These checks live inside ForgeSend too
Every check you can run here also runs live inside the ForgeSend campaign builder as you write — subject scoring, spam detection, and pre-send guardrails in a single workflow.