GCode Viewer is a powerful in-browser tool designed for viewing, analyzing, and interpreting GCode files with ease. This advanced GCode viewer works directly in most modern browsers—whether you're on Chrome, Firefox, Safari (v6+), Opera, or even IE10—across any operating system, no installation required. Just drag and drop your .gcode file into the interface to get started. Key Highlights of This GCode Viewer: Interactive 2D layer-by-layer GCode viewer to visually explore your print paths Highlights retractions and restarts for a clearer understanding of your print flow Displays movement speeds: printing, travel, and retraction speeds are all visible Option to animate layer sequences or inspect partial segments of each layer Compare two layers at once to examine overhangs and potential print issues Adjustable line width to mimic actual extrusion more realistically The GCode viewer attempts to auto-detect nozzle and filament diameters; if parsing fails, you can manually input these in the "Printer Info" section Analyze essential printing metrics: estimated print time, filament usage, layer height, and more—both per-layer and overall This GCode viewer offers seamless integration between the visual representation and the raw code: you can select a region in the visual view and instantly highlight the corresponding GCode lines. Despite being a web-based tool, the GCode viewer works offline after initial loading—no data is sent or received beyond the core app. Bonus: there's a 3D GCode viewer included—though it’s still underwhelming and marked for a future overhaul. Keep in mind: the GCode viewer is a bit heavy on memory and demands a modern browser for smooth operation. But it’s entirely open-source, so you’re welcome to tweak, extend, or embed it however you wish.