Best Tools for CAD Part Validation with Suppliers (2026)

Screenshots, 3D PDF, eDrawings or a 3D link? Compare the 5 best tools for validating CAD parts with suppliers and subcontractors: no software required on their end.

Validating a CAD part with a supplier is often a painful back-and-forth: you send a STEP, they can't open it, you send a screenshot, they approve a 2D image, a dimension is misread, the part comes back non-conformant. This loop wastes an average of 2 weeks per iteration. The right tooling cuts it to 48 hours.

Why CAD part validation is poorly tooled in most companies

• The supplier doesn't have the same CAD software as you
• 3D PDFs are heavy (100+ MB) and render poorly on mobile
• 2D screenshots miss critical angles and tolerances
• Screen-sharing meetings require scheduling and suffer from lag
• Files sent by email get lost in threads with no version control

Top 5 tools for validating CAD parts with suppliers

1. OmniView 3D — Fastest for remote part validation

Upload your STEP or IGES to OmniView 3D in 60 seconds. Send the link to your supplier. They open it in their browser, rotate the part from every angle, explore exploded views of assemblies, see dimension callouts — and send you precise feedback by message. No software, no account on their end. Files are private and EU-hosted. Free plan available.

• ✓ Interactive 3D link in 60 seconds
• ✓ Exploded view for assembly reviews
• ✓ No software or account for the supplier
• ✓ EU-hosted, GDPR compliant
• ✓ Dimension callouts visible in the viewer

2. eDrawings Viewer — For SolidWorks-to-SolidWorks teams

eDrawings is the reference tool when both you and your supplier are on SolidWorks. PMI annotation fidelity is excellent. The downside: the supplier must install eDrawings Viewer, which blocks ~30% of exchanges with partners outside the SolidWorks ecosystem.

3. 3D PDF (Adobe Acrobat) — The bureaucratic standard

3D PDFs exported from SolidWorks, CATIA or as STEP are readable in Adobe Acrobat. Universal format, archivable, signable. Downside: files are heavy (100+ MB for assemblies), interaction is limited, and visual quality is poor. Most reviews still happen on the flat 2D view at the bottom of the page.

4. Zoom / Teams screen sharing — For complex assemblies

Screen sharing still works well for complex, iterative reviews. The engineer opens the file in their software and navigates the model live. Effective for nuanced back-and-forth, but requires scheduling a time slot — and Teams/Zoom latency degrades 3D viewer smoothness.

5. Email with screenshots — The default (worst option)

Email with screenshots remains the most common method — and the most dangerous. A hidden dimension, a wrong viewing angle, an assembly shown closed instead of exploded: these are all sources of misinterpretation. Screenshots are a leading cause of non-conformances in production.

Which tool to use for your situation

• Supplier has SolidWorks → eDrawings Viewer (maximum PMI fidelity)
• Supplier unknown / outside SolidWorks ecosystem → OmniView 3D (zero friction)
• Official signed validation required → 3D PDF (archiving, traceability)
• Complex part with many iterations → OmniView 3D + Teams if needed
• Avoid at all costs → Email with screenshots only

FAQ

How do I validate a CAD part when my supplier doesn't have SolidWorks?

Use OmniView 3D: upload your STEP, get a link, send it. Your supplier opens the model in their browser without any software. They see the part in 3D, zoom in, rotate, identify critical zones — and reply with precise feedback.

What 3D format should I send to a supplier?

STEP (ISO 10303) is the universal B2B exchange format. Your supplier can import it into any CAD software (SolidWorks, CATIA, Fusion, Inventor). For review-only purposes, an OmniView 3D link replaces the raw file with a browser-accessible interactive model.