Click the "Select File" button above, and choose your ASH file.
You’ll see a preview, if available.
Click the "Convert file to..." button to extract text information.
Convert ASH to another file type
To convert your ASH file to another format, you need Dolphin Emulator or other Game software.
Convert a file to ASH
To convert other file formats to the "Compressed System Archive" file type, you need software like Dolphin Emulator or a similar tool.
About ASH files
The .ash file extension is a multi-purpose container used in three distinct, unrelated technical environments, causing significant confusion for users.
Nintendo System Archive: Most commonly, this is a compressed system file found on Nintendo Wii and Nintendo Switch consoles. These files often utilize the ASH0 header and contain menu assets, UI layouts, or game data compressed with proprietary algorithms (LZ77/Huffman variants). They are binary "blobs" that standard archiving tools like WinRAR cannot open directly. Users typically encounter these when modding consoles or emulating games via Dolphin Emulator.
KoLmafia Script: In the PC gaming world, .ash is a plain-text scripting file used by KoLmafia, a Java-based automation tool for the game Kingdom of Loathing. These files contain commands to automate inventory management or quests. Because they are plain text, they can be viewed in any editor but are often mistaken for executable binaries.
ArchiCAD Texture / JFIF Image: A less common but critical variation is a shading texture used in Graphisoft ArchiCAD. Technical analysis often reveals these files are simply standard JFIF (JPEG) images with a changed extension.
Practical Constraints: The real problem is ambiguity. A user cannot determine the format (Archive vs. Text vs. Image) without inspecting the file header. Standard image viewers will reject the Nintendo format, and text editors will display garbage code if opening the binary archive.
Convert.Guru analyzes your ASH file, detects the exact format, and lets you read the text inside.
If you want to convert ASH file to JS, TS, PY, JAVA, CPP, C, CS, PHP, RB, GO, RS or SWIFT, you can use Dolphin Emulator or similar software from the "Nintendo System Archive" category. In the File menu, look for Save As… or Export….
To convert SH, PY, KT, PS1, SWIFT, LUA, PL, JAVA, SCALA, JS, VBS or TS files to ASH, try Dolphin Emulator or another comparable tool in the "Nintendo System Archive" category.
The ASH Converter Story
The history of Convert.Guru began over 25 years ago in California with Tom Simondi’s file-format database. A former contributor to Space Shuttle development and a software pioneer of the 1980s, Simondi established a trusted resource for file type analysis that was even referenced by Microsoft Windows XP. Today, we use modern technology to process and convert thousands of file formats while continually improving our ASH converter.