Validation

Password (No Special Chars)

Validate passwords requiring at least one lowercase, one uppercase, one digit, and minimum 8 characters — no special characters required.

Try it in RegexPro →

Available in

JSSupported

JavaScript / ECMAScript

Browser-native RegExp. Default if you don't pick.

PYSupported

Python (re)

CPython stdlib `re`. Unicode-aware `\w` and `\d` by default.

GOSee workaround

Go (RE2)

Linear-time matching. No backreferences or lookarounds.

Pattern

regexengine-agnostic
^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)[A-Za-z\d]{8,}$

Raw source: ^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)[A-Za-z\d]{8,}$

How it works

Three positive lookaheads (?=.*[a-z]) (?=.*[A-Z]) (?=.*\d) require a lowercase letter, uppercase letter, and digit somewhere in the string. [A-Za-z\d]{8,}$ then matches 8+ alphanumerics. Lookaheads are zero-width so they don't consume — they're constraints, not consumers. Note: Go's RE2 does not support lookaheads, so this pattern won't compile there.

Examples

Input

Password1

Matches

  • Password1

Input

MyPass99

Matches

  • MyPass99

Input

weakpass

No match

—

Common use cases

  • •Lightweight signup form validation
  • •Password reset flows
  • •Internal-tool password rules
  • •Transitional rule when migrating from legacy systems
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