Free online TXT to AMF converter

What the TXT format is

TXT is a plain-text container with no mandatory structure, metadata scheme, units, or geometry definition. Notepad, Windows Notepad, macOS TextEdit, code editors, measurement software, CAD exports, and scripts commonly create TXT files.

For this conversion, the useful form of TXT usually contains 3D vertices and triangle or polygon indices, such as v 0 0 0 and f 1 2 3, or one XYZ coordinate per line. A file containing descriptive writing, a list of dimensions, or unstructured coordinates needs interpretation before it can become a model.

What the AMF format is

AMF, the Additive Manufacturing File Format, is an XML-based 3D model format designed for additive manufacturing. It can store vertices, triangular faces, object names, colors, materials, textures, scale units, and multiple objects in one file.

AMF is useful when a slicer or manufacturing workflow needs more information than a basic STL file can provide. Its XML structure is readable and extensible, but support is less consistent than STL or 3MF, so the target printer software must support AMF.

How to actually convert TXT to AMF

1. Identify the TXT structure. Open the file in a code editor and determine whether it contains vertices and faces. Confirm the coordinate order, face-index numbering, measurement unit, and whether indices start at zero or one.

2. Use the built-in converter. You can convert the file on the 101convert.com website for free, without installing any software. Upload the TXT file, select AMF as the output format when available, run the conversion, and download the result. This approach is suitable only when the input uses a structure the converter recognizes.

3. Convert mesh-like TXT data with MeshLab. If the file uses OBJ-style records, make a copy with an .obj extension only after confirming that it contains valid records such as v x y z and f a b c. Open it in MeshLab through File → Import Mesh, inspect the model, then use File → Export Mesh As and select AMF.

4. Reconstruct point data when necessary. An XYZ-only TXT file contains points, not surfaces. Import it into a point-cloud or mesh-processing application, generate a surface with a method such as Poisson reconstruction, repair holes and non-manifold edges, and then export the resulting mesh as AMF.

5. Validate the output. Open the AMF file in the intended slicer or 3D-printing application. Check dimensions, orientation, object count, wall closure, and the generated toolpath before sending it to a printer.

Quality, compatibility, and limitations

TXT does not preserve 3D meaning by itself. Missing units can cause a model to import at the wrong scale, missing face definitions prevent surface generation, and ambiguous axis order can rotate or distort the result.

A printable AMF mesh should normally be closed, non-self-intersecting, and free of duplicate vertices and non-manifold edges. Point clouds and lists of measurements require reconstruction rather than direct format conversion.

AMF files are XML and may contain large coordinate and face tables; inspect them as UTF-8 XML if a validator reports syntax errors. Some slicers read only basic AMF geometry and ignore materials, colors, textures, or multiple-object metadata. If the target software rejects AMF, export the repaired model as STL or 3MF instead.