SPFToolbox vs Zero Width Shortener
A side-by-side look at SPFToolbox and Zero Width Shortener. For an in-depth review of either product, follow the links below.
SPFToolbox
Business & Commerce
SPFToolbox is an email delivery and inbox testing tool for email marketers. It allows you to validate and monitor email infrastructure to optimize deliverability. Features include inbox testing, blacklist monitoring, and email rendering.
emaildeliverabilitytestingmonitoringinboxvalidation
Zero Width Shortener
Online Services
Zero Width Shortener is a URL shortener service that uses invisible Unicode characters to shorten links, keeping the original URL intact while making it appear shorter.
url-shorteningzero-width-charactersinvisible-characters
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