VS Code Extension
    Available Now · v0.3.13

    JobLine G-Code Intelligence

    Simulate and review CNC programs in VS Code before they reach the machine. A 3D toolpath simulator and a code review that flags problems on the line that causes them — for Fanuc, Haas, Siemens, Mazak and Okuma, plus Fanuc Robot TP and ABB RAPID. Free to install. No account required.

    Install from VS Code Marketplace

    Or press Ctrl+P in VS Code and run: ext install WeCr8-Solutions.jobline-gcode

    Runs locally. Your programs are never uploaded.

    JobLine 3D simulation of a sample program on a Haas UMC-750 with a Makro-Grip 5-axis vise: serrated steel jaws, see-through stock, the finished part in gold, toolpath and tool
    Haas UMC-750 with a Makro-Grip 5-axis vise: jaws, vise body, gripped stock and the finished part. RevPack vise setups ship in v0.3.14 (in review).
    Simulation

    See the program run against the setup

    The visualizer draws every move against the stock, the workholding and the finished part, so you can see what the tool will touch before you prove out the program at the machine. It is a review aid, not collision certification.

    • Play, pause, step and speed

      Play / Resume, Pause, Stop / Reset, Step - and Step +, at 0.25x to 4x. The current line is highlighted in the editor as the tool moves.

    • Toolpath, stock, tool and jaws

      G00–G03 in G17/G18/G19, G20/G21, G90/G91, with rapids and feeds drawn differently. Box or bar stock, ISO insert-aware mill and lathe tools, fixtures and jaws.

    • Import the finished part

      Load the target part as STL, tessellated STEP (bundled OpenCascade) or Fusion 360 F3D setup data, and see it against the toolpath.

    • The real vise: body, jaws, stock and part
      v0.3.14 · in review

      RevPack setups draw a LANG Makro-Grip 77 5-axis vise on a Quick-Point plate and riser, with a 3 mm grip on a pre-stamped blank. The vise body, each serrated jaw, the plate, the riser, the stock and the finished part are separate solids.

    • Solid, Transparent or Wireframe, per object
      v0.3.14 · in review

      Set the stock, target, vise body, jaws, zero-point, tool, holder and toolpath separately, with opacity. Presets: All solid, Inspect part and Workholding only.

    • Collision and grip warnings that name the solid
      v0.3.14 · in review

      A rapid into the jaw is reported as a rapid into “Makro-Grip 77 jaw +Y”, the jaw turns red, and the finding links to the line. Feeds into the grip zone and grip depth are warned too.

    • Part to origin / Set WCS
      v0.3.14 · in review

      Put the work origin on any of 27 box points, a face, a bore center or axis, or picked points. Rotate, offset and center the part in the stock, with a G54 readout.

    VS Code with the program in the editor, the Play, Pause and Step buttons in the title bar, and the 3D simulation beside it
    The program and the simulation side by side, with the playback buttons in the editor title bar.
    The View panel with each object set to Solid, Transparent or Wireframe: jaws in wireframe, vise body transparent
    Per-object Solid / Transparent / Wireframe (v0.3.14, in review).

    Collision and grip warnings that name the jaw
    v0.3.14 · in review

    A seeded test program rapids into the +Y jaw: the jaw is drawn red and the finding names Makro-Grip 77 jaw +Y with its line number
    A seeded test program: the rapid into the +Y jaw is drawn red and named, with its line.

    Part to origin / Set WCS
    v0.3.14 · in review

    The Origin / WCS panel: the work origin on the top face center of the part, with box points, quick faces and picks
    The work origin on the top face center, with the G54 and stock readout.
    Code review with flags

    Problems flagged on the line that causes them

    Live diagnostics underline the line as you type and list it in the Problems panel, with the reason and the fix. Click a finding to jump to it.

    Flagged lines underlined in the editor and the Problems panel listing errors and warnings for a seeded UMC-750 test program
    Flagged lines and the Problems panel for a seeded test program (errors are intentional). The RevPack checks shown are in v0.3.14, in review.

    Warnings and errors on the line

    Problems are underlined as you type and listed in VS Code's Problems panel. Validate Program re-runs every check and counts errors and warnings.

    Checked against your machine

    Pick a machine preset (control, travel, spindle limit, options) once. Moves past travel limits are flagged, and robot vs CNC programs are caught.

    Tool, offset and setup checks
    v0.3.14 · in review

    With a RevPack: missing tools, T/H mismatches, no length offset after a tool change, undefined work offsets, rpm over the machine or tool, codes from the wrong control.

    Tap drill check

    A tap with no matching tap drill earlier in the program is flagged with the right size (75%, 50% or STI), from the JobLine shop reference.

    Hover explanations

    Hover any G-code, M-code or address word for a plain-language card: what it does, its parameters and what to check. Siemens CYCLE calls included.

    Formatter and program sidebar

    Format G-Code fixes spacing, case and decimals. The sidebar lists operations, tools, offsets, cycles, probing, macros and alarms, and jumps to each line.

    Example flags

    • Canned cycle
      Canned cycle requires R (R-plane)
    • Peck cycle
      G83 peck cycle requires Q or I/J/K peck parameters
    • Tool change
      Possible unsafe tool change: no safe-Z retract found before M06
    • Program end
      Spindle may still be running at program end
    • Tap drill
      T3 taps 1/4-20, but no tool in this program drills its tap drill: #7 (0.2010) for 75% thread
    • Missing tool
      v0.3.14 · in review
      T4 is called but the RevPack tool list has T1, T2, T3
    • T/H mismatch
      v0.3.14 · in review
      T2 is in the spindle but the program applies H1 (T1's length); expected H2
    • Over-travel
      v0.3.14 · in review
      B goes to -40°; Haas UMC-750 (NGC) allows -35° to 120°
    • Spindle
      v0.3.14 · in review
      S9000 exceeds Haas UMC-750 (NGC)'s 8100 rpm
    • Collision
      v0.3.14 · in review
      Rapid move puts T4 into Makro-Grip 77 jaw +Y (moves, serrated) (moving jaw)
    A G83 peck-drilling hover card in the editor
    Hover explanations: a G83 peck-drilling card.
    Toolbar and commands

    Every button, and what it does

    The editor title bar runs the simulation from the program; the visualizer panel holds the playback, speed, view and display controls; the Command Palette has the rest.

    Labeled screenshot of the editor title-bar buttons and the visualizer's playback, speed, view, display and Origin / WCS controls

    Editor title bar

    • Eye · Show Toolpath Visualizer
      Opens the 3D simulation beside the editor
    • G-Code: Play / Pause
      Starts and pauses the simulation
    • G-Code: Step Back / Step Forward
      Moves one move at a time
    • G-Code: Jump to Line
      Moves the simulation to a source line number
    • Open Tool Preview · Open Simulation · Full Window
      Tool and holder preview; the visualizer beside the editor or in its own column

    Visualizer panel

    • Play / Resume · Pause · Stop / Reset · Step - · Step +
      Playback; Stop / Reset returns to the start
    • 0.25x · 0.5x · 1x · 2x · 4x
      Simulation speed
    • Top · Front · Right · Iso · ViewCube
      Camera views, with orbit, pan and zoom
    • Solid · Wireframe · Target only · Compare
      v0.3.14 · in review
      Whole-scene display modes
    • All solid · Inspect part · Workholding only
      v0.3.14 · in review
      Per-object display presets
    • Origin / WCS · Part to origin
      v0.3.14 · in review
      Box points, faces, presets, picks, rotate, offset, undo

    Command Palette

    • JobLine: Validate Program
      Re-checks the program and counts errors and warnings
    • JobLine: Format G-Code
      Word spacing, uppercase G/M codes, fixed decimals
    • JobLine: Switch Machine
      Picks the machine preset the program is checked against
    • JobLine: Load RevPack…
      v0.3.14 · in review
      Loads a program's machine, tools, stock and workholding

    Supported CNC Dialects & Robot Languages

    Five CNC dialects on one ISO / Fanuc-style engine, and two robot languages with highlighting and control checks. This is not full controller emulation.

    Fanuc

    0i/30i/31i series with full Macro B variable highlighting

    Haas

    NGC controls — VF, ST, UMC, UR with setting codes

    Siemens

    Sinumerik 840D/828D with CYCLE call support

    Mazak

    Smooth technology / Matrix (EIA/ISO mode)

    Okuma

    OSP-P series program support

    Fanuc Robot TP

    Fanuc robot teach pendant program intelligence

    ABB RAPID

    ABB robot RAPID language support

    Part of the JobLine Platform

    The G-Code extension is the program review layer at the programmer's desk. Pair it with for the shop-floor side: program transfer, machine monitoring and live status, on the same JobLine platform your supervisors and operators already use.

    Why CNC Programmers Choose JobLine G-Code Intelligence

    • Free — no credit card, no account required
    • Runs locally — your programs are never uploaded
    • 3D simulation with play, step and speed controls
    • Errors flagged on the line before they reach the controller
    • Tap drill check against the JobLine shop reference
    • Hover docs eliminate manual-lookup time
    • Machine presets for travel and spindle limits
    • Live sidebar with 11 views, updated as you type
    • Macro B parser with expression evaluation
    • 5 CNC dialects + 2 robot languages

    Free Shift Handoff Template

    The one-page handoff your next shift will actually read. Excel + printable PDF.

    Enter your work email to receive the free shift-handoff template. It is free, with no purchase, trial or card required. We use your address to send the file and to answer you. See our Privacy Notice.

    Free on VS Code Marketplace

    Ready to Write Better G-Code?

    Install JobLine G-Code Intelligence from the VS Code Marketplace: 3D simulation, code review with flags, hover explanations and the program sidebar, free. Runs locally; your programs are never uploaded.

    Install Free Extension

    ext install WeCr8-Solutions.jobline-gcodeMarketplace listing