Free Online Autodesk Fusion Viewer (No Signup)
Also opens DWG, DXF, STEP, IGES, IFC, SKP, STL, OBJ, GLB, FBX, 3DM and other 3D/CAD files. Drop any file on the viewer.
Works directly in Chrome, Firefox, Safari, and Edge
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What Is an Autodesk Fusion File?
Fusion (formerly Fusion 360) keeps designs in Autodesk’s cloud. When a design is exported as a file it becomes an .f3d: a ZIP package holding the exact B-rep bodies, the design history, the thumbnail and, in designs saved by current releases, the display mesh Fusion was drawing: every face of every body as triangles, with the tree of components and occurrences that places them. An assembly that references other designs is exported as an .f3z, a package of .f3d files with a manifest naming the top design.
The viewer reads that display mesh in your browser. It places every body where the assembly has it, draws a component used several times at each of its occurrences, and puts the occurrences hidden in Fusion on a “Hidden in Fusion” layer that starts switched off, so the design first appears as it looked in Fusion. It turns Z-up and Y-up designs the right way up and opens them in centimetres, Fusion’s own unit.
Designs saved by Fusion releases before 2026 carry no display mesh. They open to a notice that shows the design’s thumbnail and the Fusion release that saved it; export them from Fusion as STEP and open them in the STEP viewer. A design that opens exports like any 3D model, for example to STL, GLB or OBJ.
Who Uses Autodesk Fusion Files?
Makers, product designers, robotics teams and small engineering firms design in Fusion and share .f3d and .f3z files in project repositories, in email and with clients. The person receiving one often has no Autodesk account; this page shows the design in any browser, with no sign-in and nothing to install.
Common Use Cases
- Look at a Fusion design someone sent as an .f3d without an Autodesk account
- Check an assembly: which bodies it holds and where each one sits
- Show the parts that were hidden in Fusion by switching on their layer
- Measure a body or cut the design with a section plane
- Convert a Fusion design to STL, GLB or OBJ for a 3D printer or another program
- See the thumbnail of an older design before asking its author for a STEP export
Features
Opens Current Fusion Designs
.f3d files saved by current Fusion releases, and the top design of an .f3z, loose or inside a .zip.
The Whole Assembly
Every body where the assembly has it, placed by its component occurrences.
Components Read Once
A component used many times is read once and drawn at each of its occurrences.
Hidden Parts on a Layer
What was hidden in Fusion stays on a “Hidden in Fusion” layer you can switch on at any time.
Thumbnails of Older Designs
A design saved by an older Fusion release shows its own thumbnail and the release that saved it.
Real Size in Centimetres
The design opens at its real size and upright, so measurements match Fusion.
Measure and Section
Click two points to measure a distance, or cut the model with a section plane.
Convert to STL, GLB or STEP
Save the model as STL, GLB, OBJ, 3MF, USDZ, STEP, DXF or DWG, or the view as PDF or PNG.
Nothing Is Uploaded
The file is read and drawn entirely in your browser. No account, no upload, no copy of your design on a server.
Share and Embed
Send a link that opens the model in any browser, or drop the viewer into your own page with one iframe.
Compatibility & Format Notes
What opens: .f3d designs saved by current Fusion releases (2026 and later), which carry Fusion’s display mesh, and the top design of an .f3z. Every body is drawn as Fusion tessellated it, placed by its component occurrences; occurrences hidden in Fusion are on a layer that starts switched off. Units are centimetres.
What shows a notice: designs saved by earlier Fusion releases, which hold only the exact B-rep. The notice shows the design’s own thumbnail and names the Fusion release that saved it, with the advice to export STEP. The top design of an .f3z whose bodies all live in referenced designs shows the notice too.
Not drawn: appearances and colours (bodies are drawn in a neutral grey), sketches, construction planes and axes, bodies inside the referenced designs of an .f3z, and the design history. The geometry is Fusion’s display tessellation; for exact B-rep geometry, export STEP from Fusion.
Embed on Your Website
Add this viewer to your own site with a single line of HTML. Click Embed in the toolbar to generate an embed code, or use the snippet below with your own file URL.
Your Files Stay on Your Computer
Your Autodesk Fusion files are parsed entirely in your browser. Nothing is uploaded, stored, or shared unless you explicitly click the Share button. Shared files are hosted for 90 days then deleted.
Frequently Asked Questions
▶Do I need Fusion or an Autodesk account?
No. The viewer reads the .f3d package with its own reader, in your browser. Nothing from Autodesk needs to be installed, and no account is needed.
▶Why does my file show a notice with a picture of the design?
The design was saved by a Fusion release from before 2026. Those files hold the exact B-rep but not the display mesh this viewer draws, so the viewer shows the thumbnail saved in the file. Open the design in Fusion and export it as STEP, or save it again from a current Fusion release, and upload that file.
▶Why are some parts missing?
They were probably hidden in Fusion. Hidden occurrences are on the “Hidden in Fusion” layer, which starts switched off: switch it on in the layers panel to see them. Parts that live in designs referenced by an .f3z are not drawn yet.
▶Is the geometry exact?
It is the tessellation Fusion itself drew on screen, which is right for viewing and measuring. For machining or further CAD work, export STEP from Fusion.
▶Is this Fusion viewer really free?
Yes, completely free. No signup, no watermarks, no file size limits on the viewer (the optional share-link feature has a 100 MB upload cap). Built by Innerscene as a tool for architects, engineers, and designers.
▶Are my files uploaded to a server?
No. All parsing, rendering, and conversion runs in your browser — nothing is uploaded, stored, or transmitted by default. The Share button is the only feature that uploads a file, and only when you explicitly click it.
▶Can I convert to another format?
Yes. Click Export in the toolbar. The menu offers GLB, OBJ, STL, USDZ, 3MF, PLY, STEP (a faceted solid), DXF, DWG (converted on our server), PDF, SVG, PNG and JPG.
▶Can I embed this viewer on my own site?
Yes. Click Embed in the toolbar to generate a one-line <iframe> snippet you can paste into any HTML page. You can choose whether the embed shows the viewer’s toolbar.
Autodesk and Fusion are trademarks of Autodesk, Inc.; Innerscene is not affiliated with Autodesk.