Glossary
Tech terms, in plain English
Short, cited definitions of the terms behind our developer tools — what they mean, why they matter, and the free ToolAnchor tool that works with each.
Definition
JWT (JSON Web Token)
What a JWT is, its three parts, and how it's used for authentication.
DefinitionBase64
What Base64 encoding is, why it exists, and how much it grows data.
DefinitionCron expression
What a cron expression is and how its five fields schedule tasks.
DefinitionUUID (Universally Unique Identifier)
What a UUID is, how big it is, and why version 4 is effectively collision-free.
DefinitionMIME type (media type)
What a MIME type is and how it tells software how to handle a file.
DefinitionHTTP status code
What HTTP status codes are and what each numeric class (1xx–5xx) means.
DefinitionURL encoding (percent-encoding)
What URL encoding is and why spaces and symbols become %XX in links.
DefinitionSHA-256 (hash function)
What SHA-256 is, what a hash is, and why hashing is one-way.