Free Online G-Code Viewer & Printability Analyzer


Upload G-Code

No file loaded

Toolpath Display

Colour Mode

Layer Control

Layer: All
  Drop G-Code File

Print Analysis

Waiting...

Checks Performed

Travel Efficiency
Print Speed
Retractions
Layer Consistency
First Layer
Temperature
Overhang Risk
Toolpath Complexity

Printability Score

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Waiting for analysis...

Score Guide

90-100 Excellent
Optimised print settings

75-89 Good
Minor optimisation possible

50-74 Moderate
Review detected issues

Below 50 Poor
High print failure risk

Detected Issues

No analysis performed

Next Steps

What is a G-Code Viewer?

A G-Code viewer allows users to inspect the instructions generated by slicing software before sending files to a 3D printer. It displays movements, extrusion paths, layers and print behaviour.

Features of the NS3D G-Code Viewer

Why Analyse G-Code Before Printing?

Checking G-Code before printing can identify inefficient movements, missing layers, excessive travel and potential print failures before material and machine time are wasted.