Ascii85

Encoding for a sequence of byte values using 85 printable characters

Summary

Ascii85, also called Base85, is a binary-to-text encoding developed by Paul E. Rutter for the btoa utility. By using five ASCII characters to represent four bytes of binary data, it is more efficient than uuencode or Base64, which use four characters to represent three bytes of data.

Originally created by 130.64.24.245

3/2/2005, 10:15:25 PM

Modified

3/27/2026, 12:01:36 PM

Recent revisions

NewestPiano3/27/2026, 12:01:36 PM
LaundryPizza033/7/2026, 2:49:41 AM

added [[Category:Positional numeral systems]] using [[WP:HC|HotCat]]

LOLCAFAN11/21/2025, 11:22:57 AM

/* btoa version */

Stevebroshar10/26/2025, 10:06:59 PM

avoid jargon in the short desc

Stevebroshar10/26/2025, 8:32:39 PM

/* See also */ use annotated link

Stevebroshar10/26/2025, 3:59:30 PM

It is a binary-to-text encoding ... 'form of' is fluff

Bender the Bot8/9/2025, 5:23:58 PM

/* External links */ HTTP to HTTPS for [[SourceForge]]

Ira Leviton6/20/2025, 1:57:11 AM

endoded→encoded - [[toolforge:typos]]

Gadham6/14/2025, 7:40:58 PM

To be honest with you I’m not sure why 256^4 is used instead of 2^32 to me it makes the data make more

ReadOnlyAccount3/18/2025, 3:03:57 AM

/* Example for Ascii85 */

ReadOnlyAccount3/18/2025, 2:59:12 AM

/* Example for Ascii85 */

ReadOnlyAccount3/18/2025, 2:58:05 AM

/* Example for Ascii85 */

ReadOnlyAccount3/18/2025, 2:55:55 AM

/* See also */

ReadOnlyAccount3/18/2025, 2:55:30 AM

/* Example for Ascii85 */

ReadOnlyAccount3/18/2025, 2:38:53 AM

/* Example for Ascii85 */ account for those <~/~> prefixes/postfixes actual programs will likely spit out, in case people are verifying this (like me!)

ReadOnlyAccount3/18/2025, 2:28:59 AM

/* Adobe version */

ReadOnlyAccount3/18/2025, 1:16:28 AM

Reverted edits by [[Special:Contributions/121.200.52.146|121.200.52.146]] ([[User talk:121.200.52.146|talk]]) ([[WP:AntiVandal|AV]])

121.200.52.1462/27/2025, 5:47:33 PM

/* Example for Ascii85 */

Mikhail Ryazanov2/5/2025, 9:01:34 AM

/* Example for Ascii85 */ [[MOS:CAPS]]

Contributors

Source: WikipediaView full article