G-code Visualizer
Render a G-code file's toolpaths, colored by feature, movement type, tool or feed rate — directly in your browser.
Your G-code file stays on this device. MeshWrench reads and renders it locally in your browser.
Up to 400 MB. Targets common FDM slicer output from Cura, PrusaSlicer, OrcaSlicer and Bambu Studio.
Processed locally — nothing was uploaded.
- File size
- Decoded lines
- Detected slicer
- Layers
- Layer detection
- Tools
- Linear moves
- Arc moves
- Rendered segments
- Unknown commands
- Malformed lines
- Checksums
- Model width
- Model depth
- Model height
- Current command
- —
- Position (X/Y/Z)
- —
- Extrusion (E)
- —
- Feed rate
- —
- Elapsed (feed-rate-only estimate)
- —
Movement
- Extrusion moves
- Travel moves
- Retracts
- Extrusion distance
- Travel distance
- Total Z travel
- Feed rate range
Time estimates
- Slicer-provided estimate
- Feed-rate-only estimate
The feed-rate-only estimate divides path distance by commanded feed rate — it never models acceleration, jerk, pressure advance or firmware queues, and is never the same as actual print time.
Tools and temperatures
- Tools used
- Bed temperature setpoints
- Fan state changes
Things to know about this file
None — this file processed cleanly within every safety limit.
Five ways to color a toolpath
- Feature type — outer/inner walls, infill, solid infill, top/bottom surfaces, support, bridges, skirt, brim, raft, purge and prime-tower, read from the slicer's own comment labels.
- Movement type — extrusion, travel, and retract, from the actual computed E delta of each move, never merely whether an E token was present on the line.
- Tool — a distinct color per extruder/tool index.
- Layer — a gradient across the model's own layer range.
- Feed rate — a gradient from the file's own slowest to fastest commanded speed.
What this isn't
This is a visual renderer for a G-code file that already exists — never a slicer, never a firmware emulator, never a printer connection. It never uses WebSerial and never executes a single command.
Supported G-code scope
A documented semantic subset aimed at common FDM output for Marlin- and Klipper-style printers, covering typical patterns from Cura, PrusaSlicer, OrcaSlicer and Bambu Studio — not universal G-code support. Unknown commands are counted and disclosed, never silently faked.
Frequently asked questions
What do the color modes show?
Feature type (walls, infill, support, bridges, etc. — from the slicer's own comments), movement type (extrusion vs. travel vs. retract), tool, layer (a gradient from first to last layer), and feed rate (a gradient from slowest to fastest commanded speed).
Is my G-code file uploaded?
No. It's parsed and rendered entirely in your browser, inside a background Web Worker.
Does this execute the G-code or connect to a printer?
No, never. This is a visual renderer only — it never uses WebSerial and never sends a command anywhere.