ODB++ (Re)viewing like its 2026!
Colijn++ is a lightning-fast ODB++ reader and review tool built for Windows, MacOS, Linux and web browsers. Free to use, based on the published ODB++ 8.1 specification*
Viewing
See more, with less!
I built Colijn++ because sometimes you just want to open up a board design and see how it works, either for debugging or for reviewing, without having to install and run a full EDA suite.
- Cross-layer net highlighting
- Overlay net names, component pin numbers, centers, and designators
- Trace length calculation
- Basic distance measurements
- Integrated BOM and layer stackup views
Review
Fix this, enhance that.
Within Colijn++ users can leave location and layer based comments. Making it simpler to highlight potential problems and share feedback with fellow designers.
The stand-alone HTML export allows for exporting an interactive viewer, allowing anyone with a browser to open your review comments. No installation required.
- Point and area comments with severity tags and status tracking
- 1-Click view restoration
- Single-file HTML export
- Instant viewport copy with (optional) standardised sizing unifies screenshots and simplifies the creation of design review documents.
Compare
Git diff - but for hardware people.
Compare two design iterations side-by-side or overlay them with an interactive comparison slider. Colijn++ automatically categorizes design changes across components, nets, and copper geometry.
- Added: Newly introduced components, nets, and copper elements
- Removed: Elements present in the original revision but deleted in the update
- Moved: Shifted or rotated components
- Changed: Geometry, shape, or parameter modifications
3D Visualization
Oh yeah, it does 3D too!
In order to make the output of Colijn++ (whether it's the project file or the interactive HTML viewer) an all-encompassing package, it has the ability to import STEP files.
Performance
The bigger the better
I'm looking for benchmark ODB++ files. If you have a massive board I can use for testing, let me know!
- Components
- 839
- Nets
- 559
- Features
- 60k+
- Copper layers
- 6
Download
Windows
Windows 10 or later (64-bit)
macOS
macOS 11 or later
Linux
x86-64, glibc 2.28+ (Ubuntu 20.04+, RHEL 8+)
Web App
Runs in Chrome, Edge, Firefox, or Safari
* This ODB++ (re)viewer was developed in good faith using best efforts to adhere to published ODB++ 8.1 specifications. However, this software is provided "as is," without warranty of any kind, express or implied. No guarantees, representations, or warranties are made regarding the complete accuracy, completeness, or reliability of the parsing, rendering, or visual representation of any ODB++ files.
Users are solely responsible for verifying all design data and must always confirm final manufacturing data and production files directly with their printed circuit board (PCB) manufacturer prior to production.
The board in the 3D, performance and interactive demos is the ScopeFun board, open hardware
by ScopeFun.
ODB++ is a proprietary data format, maintained by Siemens; Colijn++ is in no way affiliated with Siemens.