Plaintext - MDN Web Docs Glossary: Definitions of Web-related terms 编辑

Plaintext refers to information that is being used as an input to an encryption algorithm, or to ciphertext that has been decrypted.

It is frequently used interchangeably with the term cleartext, which more loosely refers to any information, such as a text document, image, etc., that has not been encrypted and can be read by a human or computer without additional processing.