# FBX to OBJ converter The FBX to OBJ converter reads a binary or ASCII FBX in your browser and writes an OBJ with its MTL, zipped together with the FBX's base-color textures as PNG files. The unit the FBX declares becomes metres; animation clips and the skeleton are left out, and nothing is uploaded. > Canonical: https://ai3d.studio/fbx-to-obj ## FBX to OBJ in numbers ### 3 kinds of file in the ZIP The .obj, the .mtl it names and a textures folder of PNG images, so the OBJ opens with its colors. ### 1 OBJ unit per metre The unit the FBX declares is applied: a chest 83.22 cm wide in the FBX is 0.8322 units wide in the OBJ. ### 0 animation clips kept An OBJ holds one still mesh, so clips, bones and skin weights are left out and the rest pose is written. ### 250 MB per file The largest FBX the page opens; it is read inside the browser tab and 0 bytes are uploaded. ## Two FBX files through the FBX to OBJ converter What came out when the page's own sample and an animated character were converted, read back from the downloaded ZIPs. ### A textured chest: 2.6 MB in, 3.5 MB out The sample treasure chest, a binary FBX in centimetres with 26,942 triangles and one embedded texture, became a ZIP holding a 14.9 MB OBJ, a 113-byte MTL and a 1.7 MB PNG. ### The size survived the unit change 83.22 × 75.81 × 51.93 cm in the FBX came out as 0.8322 × 0.7581 × 0.5193 units in the OBJ: the same chest, written in metres. ### A dancing character lost its dance A rigged character with 2 animation clips and 2 materials came out as 55,320 triangles in its rest pose, 1.95 m wide with the arms out, and an MTL with 2 colors. ## What survives FBX to OBJ The panel under the output buttons lists these for the FBX you open. ### Triangles, UVs and normals Kept ### Diffuse color and opacity Changed ### The base-color texture Kept ### Normal, roughness and other maps Dropped ### Clips, bones and skin weights Dropped ### Unit and up axis Changed ## Why an FBX turns into a ZIP of files as an OBJ The two formats split a model up in different places. ### An FBX carries a whole scene One binary FBX can hold meshes, materials, embedded images, a bone hierarchy, skin weights and animation curves. ### An OBJ is geometry written as text An OBJ lists vertices, UVs, normals and faces line by line. Colors sit in a separate MTL file and images beside it, which is why the converter zips them. ### Text takes more room than binary Every corner of every triangle is spelled out, so the OBJ is often several times the FBX's size; the 2.6 MB chest became 14.9 MB of OBJ, or 3.5 MB zipped. ## Convert an FBX to OBJ in three actions The page opens with OBJ picked; the FBX's own images go in the same pick. ### Drop the FBX Pick the .fbx, and its image files too if it does not embed them. The page reads the unit and counts triangles, materials, textures and clips. ### Read what will be dropped The carry-over list says how many clips and which maps the OBJ cannot keep, before anything is written. ### Convert and unzip Press Convert to OBJ and unzip the download. Keep the .obj, the .mtl and the textures folder together when you import. ## Limits of FBX to OBJ conversion An OBJ is a still, color-only copy of what the FBX held. ### The rest pose, not a frame An animated character comes out in its bind pose, often a T-pose. Convert to GLB to keep the clips, or pose and export the mesh in the source program. ### One material per mesh A mesh that uses several materials keeps only its first in the OBJ; separate those faces into their own meshes before exporting the FBX. ### PBR maps stay behind Without normal and roughness maps the OBJ looks flatter in an engine; GLB keeps them. ### Linked images must come along An FBX that points at image files instead of embedding them needs those files picked with it, matched by name; a missing one leaves a flat color. ## Other routes for an FBX The conversions that keep what an OBJ drops, the way back, and a model to start from. ### [FBX to GLB](https://ai3d.studio/fbx-to-glb) Keeps the animation, the skeleton and the PBR maps in one file. ### [FBX to STL](https://ai3d.studio/fbx-to-stl) The same FBX as a Z-up STL in millimetres for a slicer. ### [OBJ to GLB](https://ai3d.studio/obj-to-glb) Packs an OBJ, its MTL and its images back into a single GLB. ### [Every 3D conversion](https://ai3d.studio/3d-file-converter) All the pairs the converter handles, from GLB and glTF to 3MF and USDZ. ### [Start from a picture](https://ai3d.studio/ai-3d-model-generator) The AI 3D model generator turns a photo, a prompt or a sketch into a textured model, which saves as OBJ here. ## Questions about FBX to OBJ Answers about textures, animation, size and units. ### How do I convert an FBX to OBJ? Drop the .fbx on the converter, add its image files if it does not embed them, and press Convert to OBJ. A ZIP downloads with the OBJ, its MTL and the textures as PNG files. ### Does FBX to OBJ keep textures? The base-color texture does: the converter saves it as a PNG beside the OBJ and links it from the MTL. Normal, roughness and other maps are not written, because the OBJ export carries color only. ### Does FBX to OBJ keep animation? No. OBJ stores one still mesh, so clips, bones and skin weights are dropped and a character is written in its rest pose. Convert to GLB to keep the animation. ### Why is the OBJ so much larger than the FBX? OBJ is plain text that spells out every corner of every triangle. The sample 2.6 MB FBX produced a 14.9 MB OBJ; the ZIP that carries it was 3.5 MB. ### What unit is the OBJ in after FBX to OBJ conversion? Metres. The converter reads the unit the FBX declares, usually centimetres, and writes one OBJ unit per metre, so a program that reads OBJ in metres shows the original size. ### Who uses FBX to OBJ, and for what? Artists moving an asset out of a game engine or an animation package into a renderer, a sculpting app or an older pipeline that prefers OBJ, and people sharing a static model. An animated character is better kept as FBX or GLB. ### Is FBX to OBJ conversion free and private? Yes. The FBX is read and the ZIP is written inside your browser tab, with no account, no credits and 0 bytes uploaded. ### Can I use what FBX to OBJ makes commercially? Every plan, the free tier included, lets you use what FBX to OBJ makes commercially: the outputs generated for you are yours. ### How does FBX to OBJ compare, and what alternatives fit a different workflow? FBX to OBJ: Convert FBX to OBJ free in your browser: the OBJ, its MTL and the FBX's color textures as PNG files come in one ZIP, in metres. Nothing is uploaded. Related options are AI 3D model editor: AI 3D model editor for a mesh you already have: upload GLB, OBJ, FBX or STL up to 200 MB, then retexture, remesh, rig or segment it. From 25 credits a tool, STL to OBJ: Convert STL to OBJ free in your browser: binary or ASCII STL in, an OBJ and MTL out, stood Y-up and scaled from millimetres to metres. Nothing is uploaded, OBJ to STL: Convert OBJ to STL free in your browser: an OBJ has no unit, so you set one; the part is turned Z-up and written in millimetres. Nothing is uploaded, FBX to STL: Convert FBX to STL free in your browser: centimetres become millimetres, the model turns Z-up for the slicer, and you can set a print height of 28 to 180 mm, GLB to USDZ: Convert GLB to USDZ free in your browser: PBR materials and textures written for Apple AR Quick Look, in metres, Y-up. Animation is not carried, and GLB Compressor: Free GLB compressor: meshopt or Draco geometry, WebP, JPEG or PNG textures resized to 512–4096 px, optional simplification. Runs in your browser, no upload. Choose by the required input, delivered output, controls, limits, current availability, and credit cost; the related-tools section links each canonical page. ## Convert an FBX to OBJ now Drop the .fbx above and save the ZIP. ## Related tools ### [AI 3D model editor](https://ai3d.studio/ai-3d-model-editor) ### [STL to OBJ](https://ai3d.studio/stl-to-obj) ### [OBJ to STL](https://ai3d.studio/obj-to-stl) ### [FBX to STL](https://ai3d.studio/fbx-to-stl) ### [GLB to USDZ](https://ai3d.studio/glb-to-usdz) ### [GLB Compressor](https://ai3d.studio/glb-compressor) _Last updated October 8, 2026_