Search for “free IFC validator” and you'll get a long list of tools that aren't really free. Solibri Anywhere shows you a model and gates the rule-checks. BIMcollab Zoom is free but only views — anything BCF-write costs. Trimble Connect's free tier caps file size and project count. Most rule checkers are paid Solibri / Navisworks / Revit add-ins.
We built this auditor as a lead magnet for our paid platform — and the honest way to do that is to make the free thing actually useful. Here's what “free” means here:
- No signup to use it. The drop zone works on first visit.
- No file size cap beyond the 250 MB browser memory limit.
- No upload to a server. Parsing happens in your browser via the buildingSMART
web-ifcWebAssembly runtime. We physically can't see your model — there's no server-side endpoint that receives it. - No premium tier hidden behind features. COBie export, PDF report, CSV downloads — all free.
- One email gate, optional. If you want the full PDF report on file, we ask for an email. You can skip it and just read the on-screen results.
What the tool actually checks
Six audit dimensions, each scored 0-100, aggregated into one ISO 19650 compliance score:
Why client-side parsing matters
Most online file tools — JSON validators, image compressors, file converters — send your file to their server. For an IFC model, that's often unacceptable: the file may carry pre-tender geometry, IP-protected family libraries, or client information your NDA forbids you from sharing.
The web-ifc library compiles the IFC parser to WebAssembly. Your browser downloads the parser once (~660 KB), then runs it locally on your file. No HTTP request carries the IFC bytes. You can verify this in your browser DevTools → Network tab while the audit runs.
Compared to other “free” tools
| This tool | Solibri Anywhere | BIMcollab Zoom | Trimble Connect Free | |
|---|---|---|---|---|
| ISO 19650 rule checks | All 6, free | Paid only | Not included | Not included |
| COBie 2.4 export | Free | Paid plugin | No | Paid |
| Client-side parsing | Yes | Cloud upload | Cloud upload | Cloud upload |
| Signup required | No | Account needed | Account needed | Account needed |
| File size cap | 250 MB (browser) | Tier-based | Generous | 5 GB / project cap |
The competitive table reflects features as of early 2026. Vendors update tiers; cross-check before committing.
What it doesn't do (yet)
This is a v1 tool optimised for ISO 19650 audit. It is honest about its limits:
- Geometry is not always rendered. Models without IfcShapeRepresentation (metadata-only deliverables) parse correctly but the 3D viewport stays empty.
- BCF 3.0 viewing is not bundled. Coming next iteration.
- Property values are not deeply audited. We count pset associations; we don't validate that a Pset_WallCommon.IsExternal is set to a sensible value per discipline.
- Federation is not supported. Drop one IFC at a time. For multi-discipline coordination, our paid CDE platform handles federated models.
Who this is for
- BIM Coordinators running pre-submission checks on their team's outputs before issuing to a CDE.
- Information Managers auditing incoming IFC deliverables on a public-tender BIM project.
- Solo BIM Consultants who can't justify a Solibri or dRofus license.
- Procurement teams who want a quick sanity check on an as-built IFC delivery.
If you're any of those, drop a model and see what the audit says. If you're coordinating ISO 19650 deliverables across a team, our paid platform extends this engine with workflow, transmittals, and project audit trails — there's a 30-min demo at cde19650.com/contact.