Free & open-source DFM analysis

Stop guessing if your
parts can be machined

Upload a STEP file and get instant DFM feedback from 100+ machinist-grade rules. See issues highlighted in 3D, get cost estimates across 4 regions, and export professional reports — all in your browser.

Unlike Protolabs or Xometry instant quotes, DFM Studio gives you detailed per-feature feedback with educational tooling insights.

.step, .stp, .igs, .iges files · No sign-up required · Runs in your browser

DFM Studio — CNC analysis overview

From STEP file to shop-floor-ready report

Four steps. Under two minutes for most parts.

1

Upload

Drop your .STEP or .STP file

2

Scan

Instant mesh-based quick scan

3

Analyze

Deep B-rep analysis with 100+ rules

4

Export

PDF, PNG, or shareable link

Deep Analysis

Every feature. Every risk.
Graded and prioritized.

The B-rep engine parses your STEP file topology — not just the mesh — to recognize holes, pockets, walls, fillets, bosses, and freeform surfaces. Each feature is evaluated against manufacturability rules covering tool access, depth ratios, wall deflection, setup count, and more.

  • Severity grading: Critical → High → Medium → Info
  • Impact axes: Cost, Time, Precision, Tool Life, Complexity
  • Educational notes on tooling and why each issue matters
CNC DFM analysis with severity badges
CNC cost estimate with regional pricing
Cost Intelligence

Know what it costs
before you get a quote.

Geometry-based pricing engine calculates stock size, material removal rate, cycle time (rough + finish), setup count, and applies regional labor rates. See side-by-side comparisons across US, China, Taiwan, and Mexico.

  • Cycle time breakdown: roughing vs. finishing passes
  • Material-aware: aluminum machines 5x faster than titanium
  • Post-processing options: tapping, reaming, anodizing, bead blast

Everything you need for DFM

Built by engineers who've spent years at the intersection of design and manufacturing.

100+ Machinist-Grade Rules

Holes, walls, radii, pockets, undercuts, access directions, draft angles, tool reach — the same checks a 30-year CNC veteran runs mentally.

3D Issue Visualization

Click any issue and see the exact faces light up on your 3D model. Understand the geometry driving each DFM concern.

Instant Cost Estimates

US, China, Taiwan, Mexico — get per-region pricing with cycle time breakdowns and material-specific cost factors.

PDF & PNG Reports

Export professional DFM reports for your shop floor, procurement team, or design review meetings.

Material Intelligence

Switch between Aluminum, Stainless Steel, Titanium, Delrin, Polycarbonate — watch how DFM severity shifts with material properties.

Shareable Links & Email

Get a unique URL for every analysis. Share with your team or supplier. Optionally receive results via email.

We're building DFM tools for injection molding, 3D printing, and more. Get notified when they launch.

Why DFM Studio?

Compared to uploading to a quoting platform and waiting.

DFM StudioQuote Platforms
Per-feature DFM feedback
3D issue highlighting
Instant results
Educational tooling notes
Multi-region pricing
No sign-up required
Free to use

Ready to check your design?

Drop a STEP file and find out in seconds whether your part is ready for the shop floor — or what to fix before it gets there.

Got feedback?

Bug reports, feature ideas, or just a kind word — we read every message.

🏭Help me buy a CNC one day