Free Email Tools

Free email tools that get you into the inbox

Work out what Amazon SES will cost you, test subject lines, preview your HTML, scrub spam words, and check your domain against the major blocklists. Every tool is free, needs no signup, and runs right in your browser.

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Amazon SES Cost Calculator

Your SES bill on every 2026 plan, next to six email APIs

Enter your monthly volume, email size, attachments, dedicated IPs and regions to see the Amazon SES bill on à la carte, Essentials, Pro and Enterprise, compared with SendGrid, Mailgun, Postmark, Resend, Mailtrap and Mailchimp Transactional list prices. Every price sourced and dated.

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Subject Line Tester

Score any subject line and see it in the inbox

Paste a subject line and get an instant, itemized score plus a live inbox preview across Gmail, Outlook, and Apple Mail. Catch spam words, length cut-offs, and weak hooks before you hit send.

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HTML Email Tester

Preview your HTML email and preheader instantly

Paste your HTML and render it live in desktop and mobile, light and dark, with a real inbox row showing your sender, subject, and preheader exactly as Gmail and Apple Mail display them. No signup, no test email sent.

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Spam Word Checker

Highlight spam trigger words and score your copy

Paste your subject and body to highlight every spam trigger word in place, grouped by category, with a transparent 0 to 100 score and plain fixes. Runs fully in your browser, so your copy never leaves the page.

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Blacklist Checker

Check your domain or IP against the major blocklists

Enter your sending domain or IP and check it against Spamhaus, Barracuda, SpamCop, SORBS, and more. Get a plain-English verdict per list and the exact steps to get delisted.

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These free tools cover the four checks worth doing before every send: is the subject line strong and un-truncated, does the HTML render cleanly across devices and dark mode, does the copy trip spam filters, and is your sending domain or IP on a blacklist. Fixing those four things removes most of the reasons good email lands in spam.

Before any of that, there is the bill. The Amazon SES cost calculator prices your volume on every 2026 SES plan, with attachments, dedicated IPs and regions, next to six popular email APIs.

They are deliberately simple and honest. No single tool decides your deliverability, and none of these will promise you a magic score. What actually moves the needle is a system: authenticated sending on a domain you own, a clean and engaged list, and mail people genuinely want. That is exactly what Meisa is built to run.

These tools find the problems. Meisa fixes the system.

Meisa automates the deliverability basics: engaged-first send ordering, a second send for people who missed the first one, and sending on your own authenticated domain to people who signed up to hear from you. Own your sending. Land in the inbox.

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Own your sending. Land in the inbox. 14-day money-back guarantee.