>_ OPEN SOURCE / WORK IN PROGRESS

Plan events in a tool you can make your own.

OpenEventCAD is a browser-based 2D planning engine for venues, inventory, reference images, setup documentation, and custom builds that stay modular and integrate into current systems.

Screenshots and images may show an earlier version while fixes are in progress. Use the live demo for the current experience.

OPEN LIVE DEMO

PUBLIC PREVIEW / BROWSER-FIRST / JSON EXPORT

OpenEventCAD / system previewPLAN · PLACE · ORGANIZE
OpenEventCAD planner showing inventory placed inside a venue
THE PLANNERA working view for venues, items, seating, and setup details.
01YOUR INVENTORYBuild the library your work actually uses.
02YOUR VENUESStart from presets or draw your own.
03YOUR REFERENCESAlign real plans behind the canvas.
04YOUR HANDOFFSave, print, export, and keep moving.
[ HOW IT WORKS ]

A clear path from
blank canvas to handoff.

Use the planner in the order that makes sense: start a plan, set the canvas, place the work, organize the layers, then save or print the result.

01

Start the plan

Choose a venue or begin on a blank canvas. Use Settings to control the grid, snap distance, and display scale.

02

Place the work

Place flooring, seating, stages, inventory, decor, equipment, runs, and grouped layouts from the planning tools.

03

Make the handoff

Review the Inventory Key, print a Setup Map or Event Plan Info sheet, and export JSON for a portable project file.

OpenEventCAD file menu showing new, open, save, import, export, and print tools
FILE MENU / SAVE + EXPORTNew planner, open, save, rename, import JSON, export JSON, print, and settings.
OpenEventCAD settings panel showing grid, snap, dark mode, scale, and snap distance controls
SETTINGS / GRID + SNAPSet the working scale and placement behavior before you build.
[ TOOLBAR REFERENCE ]

The controls for
building the plan.

Use this row while you work on the canvas. The controls move from file and selection actions into plan organization, review, and placement behavior.

OpenEventCAD toolbar showing file menu, select, pan, ruler, undo, redo, copy, paste, delete, group, labels, venue editing, Inventory Key, Layers, and Snap controls
FILE MENU

Start, open, save, rename, import, export, print, or open Settings.

SELECT / MOVE

Select an object, then move, rotate, resize, copy, edit, or delete it.

PAN VIEW

Move around the canvas without moving any plan objects.

RULER

Drag across the canvas to measure a distance. Press Escape or choose another tool to clear it.

UNDO / REDO

Step backward or forward through recent plan changes.

COPY / PASTE / DELETE

Duplicate selected work, place the copy, or remove it from the plan.

SAVE GROUP / UNGROUP

Save selected objects as a reusable layout group, or separate a saved group.

ADD LABEL

Place a free canvas label or attach a label to an item.

VENUE EDITING

Turn on editing controls for rooms and custom venue geometry.

SHOW / HIDE LABELS

Toggle visible item and canvas labels without deleting them.

INVENTORY KEY

Review item counts, setup summaries, and what will print with the plan.

LAYERS

Manage reference images, item and venue layers, visibility, order, and locks.

SNAP

Turn placement snapping on or off; set grid and snap distance in Settings.

[ PLANNER PREVIEWS ]

Build the plan
from the room out.

OpenEventCAD venues panel showing indoor room presets and a room layout on the canvas
VENUE STARTING POINTChoose a preset room or venue, then edit the geometry around the real space.

INVENTORY TOOLS

Seating, runs, flooring, and saved layouts.

GROUPED SEATING

Build chair rows and table seating as a set, with the spacing, aisles, facing, and pattern set before placement.

DRAWN RUNS

Draw connected Pipe & Drape, fence, and bistro-light runs along the setup line.

FLOORING + STAGE

Add the footprint first, then edit dimensions, labels, and stage attachments in the plan.

SAVED LAYOUT GROUPS

Save a selected arrangement and place it again as a reusable group.

OpenEventCAD setup reference image window with rotation, full-image, and manual scale controls
OpenEventCAD grouped seating panel for chair rows and table seating
OpenEventCAD Inventory Key showing item counts, fence runs, flooring, and seating summaries

INVENTORY KEY

Counts and setup details for this plan.

Review item counts and setup details for Pipe & Drape, fence and light runs, flooring, and seating. Select the detail sections that belong in the printed handoff.

[ WORKFLOW ]

Keep the work
in sequence.

Start with a venue, a blank canvas, or a manual reference image. Then set scale and snap, place the work, review the plan, and create the handoff.

PLANNING WORKFLOW

Build with the whole project visible.

Reference images remain useful for site drawings, room plans, custom venues, and custom items. Add them from Layers, rotate and scale them, adjust opacity, then lock them behind the active plan.

01 CHOOSE A STARTING POINT02 SET SCALE + SNAP03 LAYER + PLACE THE WORK04 REVIEW, PRINT, OR EXPORT
[ CUSTOM BUILDS ]

Make the engine fit
the existing website.

Keep the planning core as the base while changing the inventory, venues, logo, CSS, font, and surrounding experience for a specific organization.

OpenEventCAD Build Custom Item tool showing drawing controls, height, hanging, snapping, and save item

CUSTOM ITEMS + CUSTOM VENUES

Build the pieces your plan needs.

Use the builder for custom inventory footprints and custom venue geometry. Then shape the rest of the build around your own catalog and visual system.

INVENTORYVENUESCSSFONTLOGOMODDING
[ OUTPUT ]

Finish with something
the crew can use.

OpenEventCAD Print planner settings for Setup Map and Event Plan Info
PRINT PLANNERChoose Setup Map or Event Plan Info, orientation, notes, and included details.

Print settings control what goes into the handoff: map, item counts, flooring, seating, fence runs, labels, notes, and page orientation.

OpenEventCAD print preview showing a venue map and event item counts
PRINT PREVIEWCheck the final map and setup information before printing or saving a PDF.
[ OPEN SOURCE ]

Start with the
public engine.

OpenEventCAD is available as a public project for people who want to inspect the source, adapt the engine for their own operation, or contribute to the build.

Branded custom OpenEventCAD build for Absolute Event Rentals with its own site navigation and inventory categories
CUSTOM BUILD EXAMPLE

WORK IN PROGRESS — A one-person proof-of-concept build and foundation for a broader event-planning app.

GITHUB / OPEN EVENT CAD

Use the public engine as the planning core, then make the surrounding build fit the organization: its branding, website, inventory, venues, and workflow.

VIEW ON GITHUB
[ NEXT ]

Open the engine
and draw the first line.

The public engine demo is live and ready to try.

OPEN LIVE DEMO