What do the pattern letters mean?

L is a random uppercase letter, l is lowercase, d is a digit, and s is a symbol.

How do I include a literal L or d in the output?

Escape it with a backslash, e.g. \L outputs a literal capital L.

How many strings can I generate at once?

Up to 1000 lines per generation.

Is my data uploaded to a server?

No. This tool runs entirely in your browser using standard web APIs, so your input never leaves your device and nothing is logged or stored on our servers.

Does it work offline and on mobile?

Yes. Once the page has loaded it keeps working without a network connection, and the layout is responsive so it stays usable on phones and tablets.

Random Text From Pattern

Generate random strings from a custom pattern.

Support

Works Offline

Privacy First

No Login

No API

Pattern

Pattern (L=upper, l=lower, d=digit, s=symbol, \\ escapes)

Count

Generated text

OCQ-172-mr
MGL-523-bc
KEO-893-vg
TUM-730-sd
DBB-784-ys
GQL-315-yj
SWS-913-oy
DLX-378-bx
ARY-411-xt
ZLC-654-vn

About the Random Text From Pattern

Generate batches of random text such as codes, IDs, or license keys from a simple pattern syntax: L for uppercase, l for lowercase, d for digit, s for symbol, and backslash to escape literal characters.

Examples

Pattern LLL-ddd

LLL-ddd

Output

ABC-123

Keyboard shortcuts

Copy the main outputCtrl / ⌘ + Shift + C
Download the resultCtrl / ⌘ + S
Share this toolCtrl / ⌘ + Shift + S
Reset the inputsAlt + R
Open the tool search paletteCtrl / ⌘ + K

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Frequently asked questions

Version 1.0.0 · Updated 2026-08-07 · Runs entirely in your browser