Email Tools
Free email tools — transactional cost calculators, throwaway-domain checks, validators, signature generators, subject-line testers, mailto builders.
All Email Tools (15)
Explore our collection of free email tools
AWS SES Cost Calculator
Estimate Amazon SES a-la-carte cost at your volume — $0.10/1k per recipient, free tier off by default, optional attachment GB.
Estimate SES CostCloudflare Email Cost Calculator
Estimate Cloudflare Email Sending cost — 3,000 included, $0.35/1k overage, Workers Paid floor, verified destinations free.
Estimate Cloudflare CostDisposable Email Checker
Flag known throwaway and temporary-mailbox domains in a pasted list — Mailinator, Yopmail, Guerrilla Mail, and a dated denylist.
Check ThrowawaysEmail Cost Calculator
Compare transactional email cost at your volume — SES, Cloudflare, Resend, SendGrid, Postmark, and Mailgun from a dated rate card.
Compare Email CostEmail Header Analyzer
Paste raw email headers — see hops, SPF/DKIM/DMARC, delivery time.
Use ToolEmail Signature Generator
Build a polished HTML email signature with your logo, contact details, and social links — copy the code or download it in seconds.
Build My SignatureEmail Subject Line Tester
Score your email subject line in real time — length, spam triggers, emoji, ALL CAPS, power words, and an open-rate hint.
Test Subject LineEmail Template Generator
Build ready-to-send cold outreach, follow-up, newsletter, welcome, thank-you, and meeting emails in plain text or HTML.
Generate TemplateEmail Validator
Validate email address format (RFC 5322), catch common domain typos, and clean a pasted list — all in your browser.
Validate EmailsMailgun Pricing Calculator
Estimate Mailgun / Sinch transactional plan cost at your volume — Basic, Foundation, and Scale floors plus overage, not a free-100/day production price.
Estimate Mailgun CostMailto Link Generator
Generate a correct, fully-encoded mailto: link with recipients, Cc, Bcc, subject, and body pre-filled — plus ready-to-paste HTML and Markdown, instantly and in-browser.
Generate Mailto LinkPostmark Pricing Calculator
Estimate Postmark transactional cost at your volume — cheapest of Basic, Pro, or Platform, not a frozen Pro row when Platform is cheaper.
Estimate Postmark CostResend Pricing Calculator
Estimate Resend transactional cost at your volume — Free 100/day hard cap, then Pro $20 / 50k, not a $0.90/1k line without the floor.
Estimate Resend CostSendGrid Pricing Calculator
Estimate Twilio SendGrid Email API cost at your volume — Essentials plan floors, not a trial rate treated as production.
Estimate SendGrid CostSMTP Tester
Test SMTP server connectivity, authentication, and TLS support from the browser.
Use ToolSuggest a Tool
Missing something? Let us know.
Related Categories
Explore more tools you might need
YouTube Tools
17+ tools
Image Tools
25+ tools
Calculators
32+ tools
Converters
20+ tools
PDF Tools
12+ tools
Text Tools
41+ tools
Developer Tools
47+ tools
SEO Tools
12+ tools
Data Tools
16+ tools
Social Media Tools
12+ tools
Security Tools
15+ tools
Date & Time Tools
23+ tools
URL & Link Tools
8+ tools
Finance Tools
31+ tools
Health & Fitness
13+ tools
Education Tools
8+ tools
Productivity Tools
17+ tools
AI Tools
13+ tools
India Tools
15+ tools
Design Tools
20+ tools