Check if an email address is disposable, temporary, or from a known throwaway domain. Runs entirely in your browser — nothing is ever sent to a server.
Your email is never sent to our serversHow it works: the domain part of the email is compared against a curated list of known disposable and temporary email providers, entirely in your browser. No data is ever transmitted.
Free trials, referral programs and one-per-user promotions rely on the assumption that one email equals one real person. Disposable email providers break that assumption: anyone can generate an unlimited number of throwaway inboxes in seconds, sign up repeatedly, and abandon each address immediately after. For SaaS products and e-commerce sites, this translates directly into wasted trial credits, skewed analytics, and fraudulent promo redemptions. Blocking known disposable domains at signup is one of the simplest and highest-leverage anti-abuse checks available — this tool lets you test the concept for free before wiring it into a signup form via an API.