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Decoder (Etresoft)

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[www].se [ftp].se [mirror].us
Decoder_4.0.4_Mac_OS_X_Universal.dmg (2.04 MB)
MD5: 13bb0a65375a7e65115ce94d4744ef6e
For System 7.0 - 7.6 - Mac OS X
[www].se [ftp].se [mirror].us
Decoder_4.0.3_Mac_OS_X_PPC.dmg (1.14 MB)
MD5: 9376e11d8e75197dcfaf8ca647d11b81
For System 7.0 - 7.6 - Mac OS X
[www].se [ftp].se [mirror].us
Decoder_4.0.3_Mac_OS_X_Universal.dmg (2.05 MB)
MD5: 19764f926cb7361e0036a3815c263090
For System 7.0 - 7.6 - Mac OS X
[www].se [ftp].se [mirror].us
Decoder_4.0.1_Mac_OS_FAT.hqx (1.91 MB)
MD5: 0e2a19d717fecfabe6b877f0b5f83402
For System 7.0 - 7.6 - Mac OS X
[www].se [ftp].se [mirror].us
Decoder_4.0.1_French_Mac_OS_FAT.hqx (1.91 MB)
MD5: 6cd1298690961f9da476ba192879ec71
For System 7.0 - 7.6 - Mac OS X
[www].se [ftp].se [mirror].us
Decoder_4.0.1_Mac_OS_X_PPC.dmg (1.21 MB)
MD5: ba4b1982b91581d3adf77cea1ed98f3b
For System 7.0 - 7.6 - Mac OS X
[www].se [ftp].se [mirror].us
Decoder_4.0.1_Mac_OS_X_PPC_French_Docs.dmg (1.36 MB)
MD5: fc6d6cfbc429120a55c36835274f98ec
For System 7.0 - 7.6 - Mac OS X
[www].se [ftp].se [mirror].us
Decoder_X_3.1.7_Mac_OS_X_PPC.dmg (2.06 MB)
MD5: 5d73655aebf220975804414c40c7c948
For System 7.0 - 7.6 - Mac OS X
[www].se [ftp].se [mirror].us
Decoder_X_3.1.7_Mac_OS_X_PPC_alt.dmg (2.06 MB)
MD5: 307d36d82f521f4925d2e8c714194413
For System 7.0 - 7.6 - Mac OS X
[www].se [ftp].se [mirror].us
Decoder_X_3.1.5_PPC.dmg (1.98 MB)
MD5: d1730e4f8421f4ea6047c18852cdedc2
For System 7.0 - 7.6 - Mac OS X
[www].se [ftp].se [mirror].us
Decoder_Installer_3.1.sit (1.18 MB)
MD5: b339cfa3061e11b185480dbf1c3016d0
For System 7.0 - 7.6 - Mac OS X
[www].se [ftp].se [mirror].us
Decoder_X_3.0.3.dmg (2.82 MB)
MD5: e3db989815b40a94738425a43545aa07
For System 7.0 - 7.6 - Mac OS X
[www].se [ftp].se [mirror].us
Decoder_3.0_Beta_3_Mac_OS_FAT.bin (746.50 KB)
MD5: 89f3d1beb13b724de0863bd93553c43a
For System 7.0 - 7.6 - Mac OS X
[www].se [ftp].se [mirror].us
Decoder_X_3.0_Beta_3_Mac_OS_X_PPC.dmg (572.68 KB)
MD5: 784d702d41357bd414f8b6cb98e4682d
For System 7.0 - 7.6 - Mac OS X
[www].se [ftp].se [mirror].us
Decoder_X_3.0_Beta_2_Mac_OS_X_PPC.dmg (569.07 KB)
MD5: 765ca4376c757f91731d217c36cad5cf
For System 7.0 - 7.6 - Mac OS X
[www].se [ftp].se [mirror].us
Decoder_2.1.1_Mac_OS_PPC.hqx (548.16 KB)
MD5: 3c25e271fc792629963580deb0527ed5
For System 7.0 - 7.6 - Mac OS X
[www].se [ftp].se [mirror].us
Decoder_2.1_Mac_OS_FAT.hqx (765.01 KB)
MD5: 1901c4d7988de24420b5f84c4c6d530f
For System 7.0 - 7.6 - Mac OS X
[www].se [ftp].se [mirror].us
Decoder_2.1_French_Mac_OS_FAT.hqx (926.39 KB)
MD5: fa83cbf80f5ba5cf069e86002dbea6b7
For System 7.0 - 7.6 - Mac OS X
[www].se [ftp].se [mirror].us
Decoder_2.1_Mac_OS_PPC.hqx (552.32 KB)
MD5: 862bfebe236cf347554622cfe23233c7
For System 7.0 - 7.6 - Mac OS X
[www].se [ftp].se [mirror].us
Decoder_2.1_Mac_OS_68k.hqx (525.93 KB)
MD5: 2a99d17f11fd9760e9a5c4b6f85cfac1
For System 7.0 - 7.6 - Mac OS X

Decoder is a utility that decodes and decompresses various types of encondings and files. The newer the version, the more types are supported. The latest versions, 4.0.x, compatible with Macs of all architectures, support the following:

The latest versions for each platform are as follows:
- Decoder 4.0.4 for Mac OS X 10.3.9+ (Universal binary) and Windows 95+;
- Decoder 4.0.3 for Mac OS X 10.2 Jaguar (PowerPC binary), untested in 10.0 Cheetah and 10.1 Puma;
- Decoder 4.0.1 for 68k and PowerPC SSW 7, 8 & 9 (FAT binary), 68020 processor minimum.

According to the author, "Decoder 4.0.1 is virtually identical to version 4.0.3 in features and performance" and, regarding changes from 4.0.3 to 4.0.4, "there is a minor bug fix for handling corrupt MacOS X Zip archives. There is a significant bug fix on Windows for running in a modern security environment such as that of XP in 2008".

Aside from version number, separate binaries are available for different target platforms, so make sure to download the one intended for your platform. Each download is accordingly named, and ordered by version number. Some Mac OS versions are also available in French, including the latest one, 4.0.1.

All other versions are archived here for historical reasons, and in case they provide better stability, accuracy and compatibility with specific systems. They may also be useful if file size is of concern (especially for older 68k Macs).

Note: Even older versions are available on the Decoder (Columbine Technology) and Decoder (Harmony Software) pages - the programmer changed the name of his company.

The Windows versions are not archived here, but may still be accessed via the WayBack Machine at the following defunct webpages:
- (AKA
- (AKA
- (AKA
Version 4.0.4 for Windows doesn't seem to be archived, but 4.0.3 is. If you find a link to 4.0.4 for Windows, please leave it here for preservation.

Architecture: 68k PPC PPC (Carbonized) x86 (Intel:Mac) x86 (Windows)

SSW7 ~ Mac OS 9.2.2
Mac OS X 10.2 Jaguar+
Windows 95+

Doesn't work with macOS 10.14 Mojave and later. Untested between 10.7 and 10.13.


Jatoba's picture
by Jatoba - 2019, October 30 - 5:59am

Although this used to be shareware, unregistered versions weren't hindered, as far as I could see, at least before 4.0.x. It's still fully functional and usable in 4.0.x, but the author added an 8-second long wait before you can use it when you open it, 90s Ambrosia style. The 3.0.3 code didn't work with 4.0.x (it seems to identify it as a valid code, but it doesn't accept it), but perhaps it may for other 3.x versions.

One thing worth noticing about Decoder 4.0.x is that it was supposed to handle Mac OS X .ZIP files not just in OS 9 or 8, but even in 68k System SW 7, and that too in bulk, unlike with Decode AppleFile 1.1 on each file + extracting the ZIP with StuffIt or MacZip. Alas, however, it does not seem to work right. It seems to put the relevant files in the same directory (instead of keeping them separate in the __MACOSX folder), but not join the forks into one, single file, at least with version 4.0.1. Whether 4.0.3 or 4.0.4 do it right or not I do not know, but even if they do, it's irrelevant, because they are OS X only and users already have the built-in archive utility in that case. What a missed opportunity!

Finally here's some unrelated, probably unimportant trivia:
- The author, at the beginning of version 4's release, also had plans for WinRAR and other archive formats. Sort of walking The Unarchiver's path;
- Decoder got an OS X native version starting with the beta versions of version 3. The OS X versions were all named "Decoder X", but the author gave up on that idea with version 4, and renamed them the same across all platforms;
- 68k, PPC and FAT versions were made available at first, but eventually they became FAT only (up until 4.0.1, after which only OS X and Windows were supported);
- Version 4.0.2 was Universal Mac OS X only, and the first version of its kind. It had no counterpart for OS X 10.2, OS 7~9 or Windows;
- Version 4.0.3 was also Universal Mac OS X only initially, with a statement saying OS 10.2 and OS 7~9 were abandoned, but the statement got retracted and an OS X 10.2 and Windows versions soon followed;
- Unlike version 4.0, version 4.0.1 was said to work only with "System 9" and up in the official documentation, despite being available as a FAT binary for Mac OS, and not just PPC. It has been tested and confirmed to work with SSW 7.5.5 68k and Mac OS 8.1 68k just fine, on top of Mac OS 9.2.2.

MikeTomTom's picture
by MikeTomTom - 2019, October 26 - 8:43am

needs a registration code that I don't have.

You can try:
Name: Pablo/nop
Code: DeCo00=631PABLO

It's for v3.0.3, but may enable it... perhaps.

WhosIt.There's picture
by WhosIt.There - 2019, October 26 - 6:50am

Decoder is Shareware and needs a registration code that I don't have. There were newer versions released too.