What Exactly Is "The Free Trick"?
On tech forums, Reddit, and discount hunting communities, users often refer to "the free trick" when discussing how to create multiple accounts, test web apps, or sign up for free trials without needing new phone numbers or separate inboxes.
The free trick is not a hack or exploit. It is an intentional technical standard built directly into Google's email delivery architecture. Google ignores periods and supports RFC 5233 plus subaddressing, meaning your single Gmail inbox actually owns millions of unique permutations that external websites treat as completely distinct accounts.
[email protected], you automatically own every dotted combination ([email protected], [email protected]), every tagged variation ([email protected]), and the alternate domain ([email protected]).
How The Free Trick Works: The 3 Pillars
The free trick combines three distinct features that work together seamlessly:
1. The Dot Permutation Trick (2^(N-1) Variations)
Gmail strips all dots from the username before checking who owns the inbox. For an 8-character username, there are 7 potential spaces between letters where a dot can be inserted or omitted. That creates 27 = 128 unique variations. For a 12-character username, you have 2,048 variations!
[email protected]
[email protected]
[email protected]
[email protected]External websites almost always treat [email protected] and [email protected] as two completely independent users because their user database checks for exact string matches.
2. The Plus Addressing Trick (Infinite Tagging)
Append a plus sign (+) followed by any alphanumeric label. Google discards everything after the + up to the @ symbol when delivering the message:
[email protected]
[email protected]
[email protected]3. The Googlemail Domain Trick (Double Your Variations)
Google owns both @gmail.com and @googlemail.com. Every single Gmail account in the world automatically receives mail sent to the identical username at @googlemail.com. That instantly doubles every single dot and plus variation you generate!
Why Websites Fall for The Free Trick
Why does this work on almost every major website, SaaS tool, and mobile app?
- Literal String Comparison: When you register on a website, the backend application hashes or stores your email as a literal string. In their SQL database,
[email protected]and[email protected]are two unique primary keys. - Lack of Normalization: Normalizing emails (stripping dots and plus tags) requires provider-specific custom logic that most software developers do not bother to implement.
- RFC Compliance: Standard email specifications (RFC 5322) state that periods and plus characters are legal local-part characters. Blocking them would reject legitimate corporate and academic users.
Legitimate and Productive Uses of The Free Trick
- Software & Web Development QA: When building an application with user authentication, invite flows, or multi-tenant workspaces, you can test 50 different user roles and permissions without having to create 50 actual email accounts.
- Tracking Spammers and Data Breaches: By using a distinct plus tag or dot placement for each company you interact with, you can pinpoint the exact service responsible when unsolicited marketing emails arrive.
- Inbox Organization: Route newsletters, software licenses, banking receipts, and promotional offers directly into dedicated folders using automated Gmail filters.
- Single-Use Trial Testing: Evaluate software platforms and services without tying up your primary public address.
Generate The Free Trick Variations Instantly
Enter your username into our free, client-side generator to calculate all dot permutations and plus tags in milliseconds.