XXXX
Four-character mystery block
XXXX is a placeholder used to represent unknown, variable, or intentionally obscured content.
In forms and templates, it marks where specific information should be inserted.
In discussions of patterns or formats, it stands for any value: The password must follow the pattern XXXX-XXXX.
It commonly obscures sensitive data like credit card numbers or redacted text.
The four X's suggest a four-character slot, though the convention extends to any length.
- forty-oneNumber after forty
- XXXAdult content rating
- pornographicSexually explicit in content
- thirty-nineCardinal after thirty-eight
- X-ratedSexually explicit classification
adult only · adult content · parental advisory · 39 · compromised · censored · kisses · X marks the spot · placeholder · fill in the blank · redacted · variable · unknown · no name
XXXXunredacted
Not obscured or removed
uncensored · revealed · disclosed · plaintext · transparent