Is my IFC file uploaded anywhere?

No. Files are parsed entirely in your browser via web-ifc, a WebAssembly build of the open-source IFC parser. Nothing leaves your machine. The app works completely offline once loaded.

Can I use it with confidential models under NDA?

Yes. Because all processing happens in your browser and no data is ever transmitted to any server, you can safely use it with confidential project models under NDA. There is no service agreement to review with your client — no data changes hands.

Can I share the validation results with my team or client?

Yes. After running validation, click Share Report to copy a link that encodes the full Health Score and issue list directly in the URL — no file upload, no server, no account required. You can also export results as JSON, CSV, or a Validation Certificate. The IFC file itself never leaves your browser.

Yes, fully. IFC Viewer Online works on any modern browser — Chrome, Edge, Firefox, and Safari on both Mac and Windows. No plugin, no installation, no operating system restriction.

What happens if my IFC file is very large?

The app handles files up to 2 GB. Performance depends on your device — files under 200 MB load well on most modern hardware. Once parsed, geometry is cached in OPFS so every subsequent load of the same file is instant, even offline.

How does the validation work?

The validator runs 44 built-in rules in a background Web Worker so the UI stays responsive. Rules cover GUID duplicates, spatial hierarchy, orphan elements, naming conventions, missing type assignments, ISO 19650 property sets, LOD completeness, clash detection, proxy overuse, coordinate offset, storey-elevation integrity, unit consistency, and more. You can also run a buildingSMART IDS specification against the model. Every model receives a Health Score from 0 to 100. Results stream in as each rule completes.

Can I fix errors and re-export a corrected IFC?

Yes. All edits (GUID fixes, renames, property value changes) are held as non-destructive diffs with full undo/redo. Clicking Export IFC applies all diffs to the original binary in a Web Worker and downloads the corrected file — no server involved.

What IFC versions are supported?

IFC2x3, IFC4, IFC4x1, and IFC4x3. The viewer uses the open-source web-ifc parser — the same engine used by most modern BIM tools and @thatopen/components. Outdated schemas are automatically flagged by the validator.

What measurement tools are available?

You can measure lengths between any two points, areas of surfaces, volumes of enclosed elements, and individual edge lengths — all directly in the 3D viewport. Measurements persist as labelled annotations and can be exported alongside your model.

Can I load multiple IFC files at once?

Yes. Load as many IFC files as your device memory allows. Each model has independent visibility, transforms, validation, quantity takeoff, and export. Use the Scene panel to manage, reorder, or remove models at any time.

Does it work offline?

Yes, once the page is loaded. The WebAssembly parser and WebGL renderer run entirely in the browser. Parsed geometry is cached in OPFS so repeat loads are instant even without a network connection.

What are the file size limits?

There is no enforced limit — performance depends on your device. Files up to ~200 MB typically load well on modern hardware. The OPFS geometry cache means you only pay the parse cost once per file.

Is it free? Can I use it for commercial projects?

Yes, completely free. The source code is MIT-licensed. You can use the live app or fork the repository for your own projects, including commercial ones.

Solve the IFC problem blocking your delivery

Search practical answers, follow a guided path, or open a real browser demo. Written for BIM coordinators who need a decision or a fix — not another glossary.

Start with the job you need to finish

Each path narrows the library to the decisions, checks and fixes relevant to that outcome.

Validate before delivery

Run consistent checks, interpret the Health Score and define an acceptance gate.

Show validation guides

All IFC guides

Filter by topic, reading time or keyword. Newest articles appear first.

IFC-Dateien im Browser öffnen — kostenlos, ohne Installation

Ihr Auftraggeber hat Ihnen eine 200 MB große IFC-Datei geschickt. Kein Revit, kein Navisworks installiert. So öffnen, prüfen und validieren Sie die Datei — direkt im Browser.

Die 5 häufigsten IFC-Fehler vor der CDE-Lieferung

Duplizierte GUIDs, verwaiste Elemente und fehlerhafte räumliche Hierarchien verursachen den Großteil aller Ablehnungen im Common Data Environment. So erkennen und beheben Sie diese Fehler.

Questions about the IFC knowledge hub

What the guides cover, how examples are sourced, and where to start when the problem is still unclear.

Where should I start if I only need to open an IFC file?

Start with the browser-viewing guide. It explains how to open and inspect a model without installing desktop BIM software or uploading the file to a server.

Can these guides replace project-specific BIM requirements?

No. They provide practical technical workflows, but your BEP, EIR, IDS, exchange requirements and contractual acceptance criteria remain authoritative.

Are the IFC, point-cloud and video examples real?

The viewer captures and IFC workflows are produced in the application. The CRAS TLS alignment uses real scan and IFC data. The temporal LiDAR source is a clearly labelled simulated replay so it is never presented as a live sensor.

What is the difference between an IFC viewer and a model checker?

A viewer focuses on navigation and inspection. A model checker also evaluates explicit rules, reports failures and supports an acceptance decision. Several guides compare both workflows in detail.

How often is the content updated?

Articles carry publication dates and are updated when the viewer, standards or implementation evidence changes. The library defaults to newest-first so recent material is easy to find.

Do I need an account to try the examples?

No. Public demo models, spatial examples and the core IFC viewer can be opened in the browser without creating an account.