ASE File

What are ASE files and how to open them

Are you having problems opening an ASE file or are you simply curious about its contents? We're here to explain the properties of these files and provide you with software that can open or handle your ASE files.

What is an ASE file?

ASE files have multiple uses, and 3D Studio Max ASCII Export is one of them. Read more about the other uses further down the page.

3D Studio Max ASCII Export

3D Studio Max ASCII Export produces a scene description of a 3D model in plain text. It is an export format from Autodesk's 3ds Max software, used when exporting an entire scene - including meshes, materials, lights, cameras, and optional animation data - as an ASCII (readable) file rather than a binary format. This makes it useful when another program or tool needs to parse the scene structure or extract information without dealing with binary encoding.

The scene exported this way is built using blocks declared as keywords that represent components like SCENE metadata, GEOMOBJECT geometry, MATERIAL_LIST materials, CAMERAOBJECT, LIGHTOBJECT, and others. Mesh objects include definitions for vertices, faces, texture coordinates (TVert and TVFace structures from the 3ds Max SDK), normals, and optionally vertex colors. The materials section describes shader parameters such as diffuse, specular, transparency, maps, and other material properties. Cameras and lights are represented with their transform and parameter settings in accompanying blocks.

Export is done inside 3ds Max via the File → Export menu, choosing ASCII Scene Export (*.ase). A dialog appears where the user picks which components of the scene to include (meshes, materials, lights, etc.) and how to format elements like texture mapping. Some programs that import this format (e.g. UnrealEd) ignore unsupported blocks like smoothing groups or decomposed transformation matrices, since vertices are exported in world coordinates.

Files begin with an ASCII signature at the very start: *3DSMAX_ASCIIEXPORT located in the first bytes.

How to open ASE files

Important: Different programs may use files with the ASE file extension for different purposes, so unless you are sure which format your ASE file is, you may need to try a few different programs.

While we have not verified the apps ourselves yet, our users have suggested eight different ASE openers which you will find listed below.

Last updated: August 21, 2026

All known file formats using extension .ASE

While 3D Studio Max ASCII Export is a popular type of ASE-file, we know of 3 different uses of the .ASE file extension. Different software may use files with the same extension for different types of data.

Adobe Swatch Exchange File

Adobe Swatch Exchange File format represents a palette of named color swatches that Adobe applications create so that colors can be shared between programs like Photoshop, Illustrator, and InDesign. It stores solid colors, organized optionally into color groups, preserving both the color values (in various color modes) and their names. Designers use it to export or import sets of colors so palettes stay consistent across different documents or apps.

These swatch files are produced by the Save Swatches or Save Swatch Library options in Adobe apps when exporting color sets, and used later when loading or importing swatches. Some programs support reading and writing the file fully, preserving group structure, color modes (RGB, CMYK, Gray, Lab), and whether a color is process, spot, or global.

Internally the file starts with the ASCII magic signature ASEF at offset zero, followed by version numbers and a count of blocks. Each block represents either an individual swatch or a heading for a color group. Swatch blocks contain a name (as Unicode), a color space indicator (e.g. "RGB ", "CMYK", "LAB ", "GRAY"), followed by color component values stored as IEEE-754 floats in the range 0 to 1, and a small type field indicating whether the swatch is process, spot, or global.

Aseprite Animated Sprite

Aseprite Animated sprite files store complete pixel-art projects created with the Aseprite application. They encapsulate everything needed for editing or re-exporting an animation: the frame sequence with durations, multiple layers and layer groups, color mode (indexed, grayscale, or RGBA), palette data, tags (such as animation labels), slices, tilesets and tilemaps, color profiles, user metadata, and workspace properties.

These files are written by Aseprite itself, designed to be used both for ongoing editing and for export. Saving in this native format preserves all editing structure and metadata, unlike image exports like PNG or GIF which flatten or simplify layers, omit metadata, or compress animations into a single image or format. Typically Aseprite artists rely on this format to keep their work fully intact for further changes.

Internally the file uses a binary little-endian format, starting with a fixed-size header that holds global properties like canvas size, color depth, frame count, flags, and palettes. The file then contains frame records; each frame contains "chunks" of different types holding layer definitions, cel images (often compressed with zlib), tilemap or tileset data, color profiles, animation tags, slices, and custom user data.

Files begin with a 128-byte header whose magic number is 0xA5E0, followed by per-frame headers marked by magic number 0xF1FA. Each frame header gives the duration for that frame; chunks inside a frame are typed by identifiers (for example a layer chunk type 0x2004), and compressed image data is usually stored using zlib compression.

Various apps that use files with this extension

These apps are known to open certain types of ASE files. Remember, different programs may use ASE files for different purposes, so you may need to try out a few of them to be able to open your specific file.

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