Import or draw
Import an external file or draw your plan directly in Condui.
Draw one-wire diagrams, ready for inspection.
Draw your one-wire diagram, situation plan and distribution board in one browser app. Condui checks AREI points while you draw and exports a clear PDF for the inspection.
Try it nowFree to start · nothing to install · no card required
Draw your plans in record time.
Go from idea to a clear plan with fewer steps, a clear interface and straightforward feedback.
Start with One-wire or Plan
Condui is flexible — start in the way that works best for you.
AREI validation
Condui automatically checks whether your diagram meets AREI rules.
Online link with QR
Every cloud project gets a QR code so it is always available digitally.
Version history
Cloud projects keep a timeline of your work. Browse older versions and restore when needed.
Date marking
Mark the installation date of components. That way validation and inspectors can see which rules apply.
Complex off-grid supplies in the one-wire
Draw a home battery with partial or whole-home backup as one coherent supply, including a source transfer switch and phase-split inverters.
Explore every feature and technical detail
How it works
Draw a one-wire diagram in three steps
You don't need CAD experience. You draw the installation the way it is built: distribution board, circuits and devices.
-
1
Start a project
Open Condui in your browser and start from the one-wire diagram, the situation plan or your distribution board. You can also import an existing diagram.
-
2
Draw circuits and devices
Add protection devices, cables, sockets, lights and appliances with AREI symbols. Condui flags issues while you draw, so you see mistakes before the inspector does.
-
3
Export for the inspection
Create a PDF of your one-wire diagram and situation plan for the inspector. Cloud projects can also be shared with a link or QR code.
What is a one-wire diagram?
A one-wire diagram (eendraadschema) is the electrical diagram of an installation, with one line per circuit. It shows the distribution board, protection devices, cables and what each circuit feeds. Together with the situation plan it is part of the inspection of a Belgian home.
What is free?
Local projects on your device are free and unlimited, including drawing and AREI checks. A free account also gives you one cloud project with all premium features except templates. Local PDF export carries a watermark. More about drawing for free.
Who is it for?
For DIY renovators preparing an inspection, for electricians and installers who want a clean file quickly, and for students learning to draw installations.
Also read how to draw a one-wire diagram step by step, the AREI guide or our comparison of one-wire diagram software.
Create your electrical schemes today.
Try it nowPricing philosophy
Pay only for the projects you deliver.
Drawing and AREI checks cost nothing. Pay per project or take a subscription when you need more.
Home user / student
Basic
€0
The free tier stays free. Local work is unlimited. Your one free cloud project includes premium features, except templates.
- One free cloud project with all premium features
- No templates
- Unlimited local projects on your device
- Download and keep your files
- For hobbyists, students and occasional use
Per project
Upgrade a project
€20
one time
Add professional features to one more project. No subscription required.
- High-quality export
- No templates
- Keep editing the project after export
- Add your logo and signature
- Full access to your project files
Subscription
Everything included
€25
per month · first 6 months
For the first 6 months, then €35/month. Or choose €300/year. Includes the full professional toolkit.
- All per-project features
- Create and use your own templates
- Maximum export quality
- Every advanced feature as it ships
- Built for daily professional use
Team subscription
For teams
€45
per user per month · from 2 users
For larger teams.
- Everything in the monthly subscription
- Shared cloud projects for your team
- Roles and access rights per user
- Central team member management
- Central billing per user
- External partners: 10 partner projects per user per month
Getting started with Condui
Frequently asked questions
Is Condui really free?
Yes. You can draw and validate unlimited local projects without a subscription. A free account also includes one cloud project with every premium feature, so you can use the complete workflow.
Is free use unlimited?
The number of local projects is unlimited, but local projects have limitations on exporting and sharing. Your one free premium project does include every premium feature.
What are the limitations of free local projects?
Drawing and AREI validation remain available. Local projects do not include cloud sync, online sharing, comments, version history or installation date marking. PDF export is limited and includes a watermark. Some professional features, such as advanced import and a logo or signature, require a premium project.
Does Condui work without an internet connection?
Yes. Install Condui as a web app and open it online at least once. You can then draw and edit local projects offline. Cloud sync, online sharing and some premium features still require an internet connection. A cloud project must first be opened on the device before you can continue working on it offline.
Can I export cabinet labels directly to a Brother P-touch printer?
Yes. Condui creates LBX files for the Brother PT-P900/PT-P950 family and PT-E920BT. Use Sheets in P-touch Editor on desktop when you want to manage multiple rows as separate sheets. The Brother Pro Label Tool app does not support multiple sheets in one file, so choose Single strip there to place the rows on one continuous tape with cut marks.
Do I lose my projects if I stop paying?
No. Projects that are no longer covered by a subscription remain available in the cloud as read-only projects. You can still view, download, delete or keep them locally. Existing share links continue to work. A project you unlocked with a one-time payment keeps its premium access.
Can I keep my own project backups?
Yes. You can download the complete editable project and store it separately. This is especially important for local projects: they exist only in your browser or device storage and can be lost if you clear that storage, change devices or do not keep your own backup.
What is the difference between unlocking a project and subscribing?
A one-time unlock gives one specific project lasting premium access without a subscription. A subscription gives all your cloud projects premium access while it is active. Per-project access often suits occasional work; a subscription is generally better value for recurring professional work.
Pricing philosophy
Pay only for the projects you deliver.
Drawing and AREI checks cost nothing. Pay per project or take a subscription when you need more.