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Tiny tools for cleaner inboxes.
A small kit of free utilities to help you parse, format, and tame your email workflow.
Email Header Analyzer
Paste raw email headers to instantly analyze routing hops, sender authentication (SPF, DKIM, DMARC), spam scores, delivery time, and more. Free, privacy-first email header parser.
Email Rate Opener Calculator
Calculate your email campaign open rates and bounce rates instantly. Understand audience engagement and optimize your email marketing performance with our free tool.
Email Read Time Estimator
Estimate email reading time instantly with live word, sentence, and character counts, adjustable reading speed, and quick copy tools for faster writing and review.
Gmail Filter Rule Generator
Build and preview Gmail search queries for automated filtering. Select conditions like sender, subject, keywords, size, and date, then get the exact syntax and step-by-step setup instructions.
Meeting Cost Calculator
Calculate the exact dollar cost of any meeting using attendee count, hourly rate or salary, and meeting duration. Fast, free, and easy to use.
Remove Duplicate Lines
Paste a list and remove duplicate lines instantly. Free online duplicate line remover with options for case sensitivity, trimming spaces, and keeping first or last match.
Spam Trigger Word Checker
Paste your email body to detect words and phrases that trigger spam filters. Get a spam score, see flagged terms highlighted, and review a breakdown of every match.
SPF Record Generator
Create a valid SPF record in seconds. Build DNS TXT values with includes, IPs, and policy modes to improve email deliverability and sender trust.
Text Case Converter
Convert text to UPPERCASE, lowercase, Title Case, or sentence case in one click. Fast, free, and accurate text case converter for writers, students, and marketers.
Unsubscribe Email Generator
Generate short, compliant unsubscribe emails and List-Unsubscribe headers — responsive, copyable, and ready for use.