Generate custom text patterns and templates instantly with this free online pattern generator. Use brackets to define ranges, options, or sequences—perfect for creating random usernames, codes, or data sets. Supports advanced syntax like [A-Z][0-9][x,y,z] or user-[1-100]. Fast, flexible, and easy to use—no coding required!

How to Use the Pattern Generator

This tool creates random strings based on a custom pattern. Each variable element must be wrapped in square brackets […].

You can also include any literal characters—commas, spaces, dashes, slashes, colons, etc.— between bracketed tokens. These characters will appear exactly as typed in your generated string.

Supported token formats:

[a-z] – any lowercase letter.
[A-Z] – any uppercase letter.
[0-9] – any single digit.
[x-y] – any integer from x to y, inclusive (e.g. [100-200]).
[a,b,X,7,@] – any of the listed values (custom list).
[f] – the literal f (or any single literal value).
You can mix characters between patterns.

Step-by-Step:

Enter your pattern in the Pattern box, for example: [A-Z],[0-9]-[@,#].
Click Generate.
Your generated string appears in the Result box.
If the pattern is invalid or empty, an error message will appear.

Examples:

[A-Z][0-9][n,L,X][f] → G2Xf, T7Lf, Z0nf, etc.
[100-200][a][@,#][k][hello] → 139a#khello, 199a@khello, etc.
[A-Z],[0-9]-[@,#] → P,5-#, K,2-@, etc.
[a-c] [1-3] [!,$] → b 2 $, c 1 !, etc.
[1-4],[c-e],[@,#] [o] / [hello] → 3,c,@ o / hello, 1,e,# o / hello, etc.
[Acro,Ophidio,Nycto]phobia → Acrophobia, Nyctophobia, etc.
S[O,A,I]M[U,A] → SAMU, etc.
You can use emojis [😀,😎,🙃,😭,🥳]