3D model review software alternatives: Sketchfab, Autodesk Viewer, eDrawings and more

The main 3D model review software alternatives fall into three groups: viewers that let someone look at a file (Autodesk Viewer, eDrawings, ShareCAD), platforms for sharing and showing 3D to an audience (Sketchfab, and OmniView 3D, which also takes pinned comments), and review tools where the other person leaves feedback you work through (SyncSketch, ReviewStudio, MeshMarkup). Which one fits depends less on the viewer and more on what happens after the client opens the link. If you need a client's notes pinned on the model, answered, carried to the next version and closed with a sign-off, MeshMarkup is built for that loop; if you only need someone to see a file once, a free viewer may be all you need.

Every competitor fact below comes from the vendor's own pages as of October 2026, with a link to the page we checked. Products change, so follow the link before you decide.

#What to look for in 3D model review software

Most tools open a 3D model in a browser now. The differences show up in the details of a real client job:

• What the client needs. An account, an install, a particular operating system, or just a link.
• Who writes the feedback. Some tools let only the author add annotations; others let the reviewer pin a comment on the spot they mean.
• What happens to the feedback. Whether comments can be replied to, marked resolved and carried onto the next version, or whether each upload starts from zero.
• How long things last. Some free viewers remove files and links after a fixed period.
• Formats. Native CAD files, neutral formats such as STEP, or mesh formats such as GLB and FBX.
• 2D drawings. If you send DWG or DXF sheets, you need a tool that opens them; MeshMarkup is 3D only.
• Pricing model. Free, per user, per plan, or through a reseller.

#The alternatives, one by one

#Sketchfab

Sketchfab is built to publish, embed and showcase 3D. Private sharing comes with paid plans: its help centre lists "Private and Password-protected models" among the benefits of Pro and Premium. Annotations are added by the model's author to present the model: up to 20 per model on Pro, 50 on Premium, and 100 per scene on Enterprise. As of October 2026, Pro is $15 a month paid yearly ($24 monthly) with a 200 MB upload limit, Premium is $79 a month paid yearly ($129 monthly) with 500 MB and 10 team seats, and Enterprise is negotiated per customer.

Better choice when the model is finished and you want people to find it, or see it embedded on your site. Our Sketchfab alternative for client review goes into the detail.

#Autodesk Viewer

Autodesk Viewer is "a free online viewer for 2D and 3D designs", opening AutoCAD DWG, DXF, Revit RVT, Inventor IPT, STEP, SolidWorks, CATIA and others. You share a design by sending a link, and you choose which features the recipient can use (Share Designs). The viewer has general comments and screenshot markups with text and drawing tools, and comments from collaborators can be resolved (Add Annotations). As of October 2026, designs are available "for 30 days by default", and an owner can reset that countdown with Extend (Design Views). It's free.

Better choice when you need 2D drawings or Revit models, or a quick free look at a native CAD file. More in our Autodesk Viewer alternative guide.

#eDrawings

eDrawings is SolidWorks' design communication tool. The free eDrawings Viewer opens SolidWorks parts and assemblies and 2D DWG/DXF, with measure and section tools (View CAD files free). The client installs it on Windows or Mac; the iOS and Android apps are bought from the app stores (FAQ). Sharing options, as of October 2026:

• Email an eDrawings file, or use the ZIP and HTML option that embeds the viewer in a web page.
• Review-enabled files saved as .exe or .htm can be marked up without installing the viewer.
• eDrawings Professional can save WebHTML files that open in any HTML5 browser; you buy it through a SOLIDWORKS office.
• The eDrawings site points to Cloud Services for SOLIDWORKS for sharing and markup from any device.

Better choice when your client already uses SolidWorks or eDrawings, or needs the file itself to keep offline. See our eDrawings alternative for sharing with clients.

#ShareCAD

ShareCAD describes itself as a "Free online service to view CAD files and 3D models", with no installation. It reads a long list of formats, including DWG, DXF, PLT, STEP, IGES, STL, SAT, Parasolid and SolidWorks parts, up to 50 MB per file. As of October 2026 its page doesn't describe share links, comments or markup. It's free.

Better choice when you need to open a 2D drawing or an unusual CAD format yourself, once. Our ShareCAD alternative page compares the two.

#OmniView 3D

OmniView 3D shares CAD models as a link the recipient opens "no account, no software", and lists 18 formats including STEP, IGES, STL, GLB, OBJ and FBX. Teams and clients can leave comments pinned to the model surface, and the Pro plan adds an iframe embed for Shopify, WordPress and Notion. As of October 2026: a free Starter plan (3 models, 100 MB, watermark, auto-delete after 3 days), Pro at $59 a month (50 models, 5 GB) and Business at $179 a month (200 models, 50 GB), with yearly billing 20% off.

Better choice when you want 3D on product pages or in a web store as well as for review. More in our OmniView 3D alternative guide.

#SyncSketch

SyncSketch is a review tool for visual effects, animation and games, with media reviewed "with just a link" (syncsketch.com). Its 3D Model Viewer takes FBX, DAE, glTF, GLB and OBJ (Importing models). Sketches are flat overlays tied to a camera view rather than marks on the surface, and each one creates a linked comment; animated models get frame-specific notes (Reviewing 3D models). As of October 2026, the 3D Model Viewer is on the Team and Enterprise plans (and Education Plus), and animated models need Enterprise or Education Plus. We couldn't read prices from its pricing page.

Better choice when you review animation, shots and turntables with a production team, frame by frame.

#ReviewStudio

ReviewStudio is online proofing software for images, video, documents, web content and 3D. For 3D it currently takes .glb, where reviewers draw on the model's surface or drop a pin, and clicking a comment restores the view (3D content). As of October 2026 its pricing page lists a free Starter plan (3 active reviews, 5 GB), Pro at $15 per user a month ($12 yearly) and Advanced at $25 ($20 yearly, 5-user minimum), with unlimited guests who don't need an account.

Better choice when 3D is one item among many, and your team proofs print, video and web work in the same place.

#3D model review software alternatives compared

"Not described" means we didn't find it on the vendor's pages, not that it can't exist.

#Where MeshMarkup fits

MeshMarkup is for the part of the job where a client has to tell you what to change and, eventually, approve it. You upload GLB or glTF, or FBX, OBJ, STL, PLY, DAE, STEP, IGES, Rhino 3DM, 3MF or 3DS, which are converted in your browser (upload 3D models). Then:

• You send a review link set to Look only, Leave feedback or Sign it off, with an expiry of 7 days, 30 days or never (links and permissions).
• The client clicks the model to pin a note that keeps their camera view. No account, and reviewers are free on every plan.
• You reply in threads, set statuses (open, in progress, resolved, won't fix) and keep internal notes the client never sees.
• A revision goes onto the same model; open notes come with it, and a ghost overlay shows what moved (versions and comparing).
• On Solo, Studio and Pipeline, the client signs off a version, and sign-off is blocked while notes are open (client sign-off).

Measure, section cut, exploded view and a parts list help with CAD reviews, and renders and PDFs can sit next to the model. For the wider picture, see 3D model review software and 3D client review software.

Where it doesn't fit: there's no public profile, no embed code, no 2D drawing support and no frame-by-frame animation review. If those matter most, one of the tools above is the better choice, and many studios use MeshMarkup for the rounds and another tool to publish the result.

To try it without signing up, drop a file on the free viewer. Plans and limits are on the pricing page.

#FAQ

#What is the best free 3D model review software?

For viewing, Autodesk Viewer and ShareCAD are free and open many CAD formats. For feedback, MeshMarkup's Free plan covers 1 project and 3 new models every 30 days with client notes, replies and statuses; OmniView 3D and ReviewStudio also have free plans with limits listed above.

#Is there online 3D annotation software where the client writes the notes?

Yes. In MeshMarkup, OmniView 3D and ReviewStudio, reviewers pin comments on the model. Sketchfab's annotations are written by the model's author, and SyncSketch's sketches sit over a camera view rather than on the surface.

#Can I use these tools with STEP files?

Autodesk Viewer, ShareCAD, OmniView 3D and MeshMarkup open STEP. The free eDrawings desktop viewer doesn't list STEP in its FAQ, and SyncSketch and ReviewStudio list mesh formats only. See send a STEP file to a client without CAD.

#Does my client need an account?

Not in MeshMarkup, OmniView 3D or ReviewStudio for guests. Autodesk Viewer and SyncSketch share by link; their pages don't say whether an account is needed. eDrawings needs an install unless you send an HTML or review-enabled file.