Subject Line Analyzer
Review subject length, readability and practical patterns before sending.
Analyze now →Home›Useful checks before your next send.
FREE EMAIL TOOLS
Useful checks before your next send.
Analyse message preparation locally in your browser and use connected InboxAI cloud services for deeper domain, SMTP, verification and inbox-placement diagnostics as those capabilities become production-ready.
PRIVACY-FIRST TOOLKIT
Browser analysis where possible. Real infrastructure where required.
Subject-line, wording, content and header checks can run locally in the Website. DNS, SMTP and verification diagnostics require InboxAI Deliverability Cloud, while inbox-placement measurement belongs to the separate InboxAI Placement Cloud.
Spam Word Checker
Highlight wording patterns worth reviewing before an email campaign is launched.
Check your copy →Email Content Analyzer
Review message structure, readability and preparation signals directly in your browser.
Analyze your email →Email Header Analyzer
Inspect authentication, routing and message-header evidence directly in your browser.
Analyze headers →Link Checker
Inspect email HTML links, anchor text, duplicates, protocols and deterministic destination evidence locally in your browser.
Inspect links →Email HTML Inspector
Review email HTML structure, images, alt text, styling and selected compatibility signals directly in your browser.
Inspect HTML →SPF Checker
Inspect a domain's published SPF configuration with live InboxAI Domain Health diagnostics.
Open SPF Checker →DKIM Checker
Inspect selector-aware DKIM configuration through InboxAI Deliverability Cloud.
Open DKIM Checker →DMARC Checker
Review a domain's published DMARC policy and reporting configuration through Domain Health.
Open DMARC Checker →SMTP Tester
Test SMTP connectivity and configuration through a controlled server-side diagnostic service.
Open SMTP Tester →Email Verifier
Evaluate email-address validity signals through the dedicated verification service when available.
Open Email Verifier →Inbox Placement Tester
Measure placement across controlled InboxAI seed mailboxes through the dedicated InboxAI Placement Cloud.
Open Placement Tester →i
No simulated deliverability results
InboxAI will not fabricate DNS, SMTP, verification or inbox-placement results in the browser. Network-dependent tools become interactive only when their corresponding InboxAI cloud service is production-ready.
FROM CHECK TO CAMPAIGN
Run the checks automatically with InboxAI.
The long-term tools experience connects preparation and deliverability diagnostics with the wider InboxAI email-operations workflow.