Compress

Compress[expr] gives a compressed representation of expr as a string.

Examples

Compress an expression:

Compress[Range[1000]]
(* "1:eJxTTMoPSmNkYG..." *)

Decompress back:

Uncompress[Compress[{1, 2, 3}]]
(* {1, 2, 3} *)

Please visit the official Wolfram Language Reference for more details.