3D Convert

3D Convert is a free, browser-based file conversion tool that lets users transform 3D models between GLB, GLTF, OBJ, STL, 3MF, STEP, FBX, and PLY formats without uploading files to a server. It is designed for designers, engineers, and hobbyists who need to prepare models for 3D printing or web use. The service operates entirely within the user's web browser, requiring no account registration or software installation.

Users can convert multiple files at once using the Batch Converter feature, which allows them to drop several files and download the results together in a single action. This batch workflow is useful for handling groups of models due before a deadline without needing to repeat the conversion steps for each individual file. The session carries the file between pages in memory, so the converted file can open directly in the built-in 3D viewer without being re-uploaded.

The platform includes a Model Checker utility that inspects mesh topology to identify open, non-manifold, duplicate, and degenerate geometry issues. This tool helps users verify their models before converting them for 3D printing or web use, ensuring the final output meets technical requirements. The checker is part of a chain of tools where a file can move from conversion to inspection and then to compression without leaving the browser tab.

For users needing to reduce file sizes for web delivery, the GLB Compressor re-encodes GLB files and resizes compatible textures locally within the browser. The tool provides feedback on when a file will not get smaller, managing user expectations about compression limits. This utility works in the same memory-based session as the other tools, allowing a seamless workflow from conversion to optimization.

The website offers free online viewers for ten different formats, including DAE and IGES, allowing users to inspect models, parts, and dimensions before converting them. These viewers let users check for gray, empty, or partially loaded models and see resource warnings without needing to export the file first. The viewer is integrated into the conversion process, enabling a preview step that happens entirely in the browser.

The service supports a wide range of file types, including STEP and FBX, which are common in CAD exchange and engineering workflows. Users can convert from these formats to others like GLB or STL, and the tool handles the specific quirks associated with each format. The site documents limits such as STL having no colors and OBJ lacking a universal unit to manage expectations about format fidelity.

The process involves three simple steps: picking a 3D file, choosing the target format, and previewing the result before downloading. Users can drop or choose a GLB, GLTF, OBJ, STL, 3MF, STEP, or FBX file, and the browser finishes the conversion in seconds. The final step allows users to check the result in the built-in 3D preview before downloading the converted file.

To get technical support, users should email support@3dconvert.org with the page URL, file extension, approximate size, browser version, and the complete error text. The support team requests these five details to reproduce most failures without requiring a back-and-forth exchange. If the issue involves a model that loads but looks wrong, they ask for the format the file was exported from and the tool that exported it.

The site provides guides that explain what each format keeps and loses, such as the differences between 3MF and STL or STEP and STL. These comparisons help users understand the trade-offs involved in converting between specific file types. The guides are part of the focused utilities designed to be useful in the first ten seconds without requiring a tutorial.

The platform is free to use with no sign-up required, making it accessible for both casual hobbyists and professional workflows. Users can convert files privately in their browser, which is a key feature for those concerned about data privacy. The service does not charge for basic conversions, and the only limitation is a per-file size limit that a browser tab can comfortably handle.

The site explicitly states that format conversion cannot preserve features that the target format cannot represent, such as colors in STL or units in OBJ. This honesty about limitations is part of the design, ensuring users understand what to expect from the output. The same transparency applies to the tools themselves, such as the GLB compressor page telling users when a file will not get smaller.

The official website of 3D Convert is 3dconvert.org.

On Trustburn, 3D Convert has a rating of 4.5 out of 5 based on 4 reviews.