JAS Converter

Extract text from JAS files

Select File
Drop or upload your .JAS file

Online File Converter

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How to extract text from your JAS file

Click the "Select File" button above, and choose your JAS file.
You’ll see a preview, if available.
Click the "Convert file to..." button to extract text information.

Convert JAS to another file type

To convert your JAS file to another format, you need Ren'Py or other Game software.

JAS to OBJ
JAS to FBX
JAS to DAE
JAS to 3DS
JAS to MAX
JAS to BLEND
JAS to MA
JAS to MB
JAS to C4D
JAS to STL
JAS to PLY
JAS to WRL

Convert a file to JAS

To convert other file formats to the "Visual Novel Archive" file type, you need software like Ren'Py or a similar tool.

DWG to JAS
DAE to JAS
X3D to JAS
IGES to JAS
WRL to JAS
JT to JAS
SKP to JAS
3DS to JAS
3DM to JAS
OBJ to JAS
STEP to JAS
FBX to JAS

About JAS files

The .JAS extension represents two distinct, proprietary formats that often confuse users due to their incompatibility with standard viewers.

1. Ren'Py Game Archive

The most common variation (approx. 55% of files) is a game asset container used by the Ren'Py Visual Novel Engine. These files act as packed libraries (similar to ZIP or RPA) containing sprites, background art, script data, and audio.

The Problem:
Game developers pack assets into .JAS files to obfuscate content and reduce file counts. You cannot open them with standard image viewers like Windows Photo Viewer or Adobe Photoshop. They are essentially locked boxes requiring specific unpacking tools.

The Solution:
For gamers or modders looking to extract "CGs" (images) or soundtracks, the goal is extraction rather than direct conversion.

For Images: Extract contents to PNG or JPG for viewing.
For Audio: Extract to OGG or MP3.
For Code: Decompile to RPY scripts.

2. Cheetah3D Model File

The second variation is the native scene format for Cheetah3D, a 3D modeling software exclusive to macOS. It stores geometry, textures, lighting, and animation data.

The Problem:
Cheetah3D is a Mac-only application. If you are on Windows or Linux, or if you use industry-standard tools like Blender or Autodesk Maya, a .JAS file is effectively a paperweight. The format is binary and proprietary, meaning it lacks the interoperability of text-based formats like OBJ.

The Solution:

For 3D Editing: Convert to OBJ (Wavefront) or FBX (Filmbox) to import into Blender, Unity, or Unreal Engine.
For 3D Printing: Convert to STL to slice the geometry for printing.
For Web Preview: Convert to GLB or GLTF.

Convert.Guru analyzes your JAS file, detects the exact format, and lets you read the text inside.

Users also converted JASP, JSON, DOCX, MP3, PDF, 3DM, GLB and STEP files.

The JAS 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 JAS converter.