by DUONG-HOANG·Workflow
Images © DUONG-HOANG. Used for product review; image policy.
Pro 3D Dimension Tool earns its place in the Blender extensions library for its drafting-oriented approach to measurement — three-step dimensioning, snapping to exact geometry, axis and plane constraints, and a reusable style library, all kept current through automatic cleanup and updates when geometry or styles change.
Pro 3D Dimension Tool is a drafting-focused Blender extension built for creating precise, technical measurements. Developed by DUONG-HOANG, it works with Blender 4.2 LTS and newer and requires no special permissions.
The add-on uses a three-step dimensioning workflow — start-point, end-point, and offset-distance — with precision snapping to vertices, edges, and midpoints. A constraint system locks dimensions to specific X/Y/Z axes or planes using Shift plus X, Y, or Z, and real-time feedback gives an instant visual preview as you measure. You can chain dimensions into strings or split and merge segments directly in the viewport.
A custom style library manages multiple styles for different looks, covering metric versus imperial, arrows versus ticks, and fonts. Smart maintenance automatically cleans up data-blocks and updates dimensions when geometry or styles change. The current release, version 1.4.1, was published in March 2026 and is distributed under the GNU General Public License v3.0 or later.
Pro 3D Dimension Tool is best for blender users doing drafting and technical measurement work who need precise dimensions with snapping, axis and plane constraints, and reusable styles.
Pro 3D Dimension Tool is completely free to download and use.
Pro 3D Dimension Tool is compatible with Blender 4.2 LTS and newer, so it runs on the current long-term-support release and later versions. It installs as a Blender extension and requires no special permissions. The current release is version 1.4.1, updated in March 2026. If you are on an older Blender build, you would need to update to at least 4.2 LTS before using the add-on. For the latest compatibility details, check the developer's page on GitHub.
Pro 3D Dimension Tool offers precision snapping directly to vertices, edges, and midpoints, which lets you anchor measurements to exact geometry points. The workflow runs in three steps — start-point, end-point, and offset-distance — and real-time feedback shows an instant visual preview as you measure. You can also chain dimensions into strings, or split and merge segments right in the viewport. For further usage details, see the developer's page on GitHub.
Pro 3D Dimension Tool includes a constraint system that locks a dimension to specific X, Y, or Z axes or planes using Shift plus X, Y, or Z. This keeps measurements aligned to a chosen direction while you work. Alongside constraints, the add-on carries a custom style library for managing multiple looks, including metric versus imperial units, arrows versus ticks, and fonts. Smart maintenance automatically updates dimensions when geometry or styles change. More detail is available on the developer's page.
Pro 3D Dimension Tool is listed here as free, and it is distributed under the GNU General Public License v3.0 or later. The extension requires no special permissions in Blender. Version 1.4.1 was published in March 2026 and includes a fix for updating a dimension after removing the origin snap vertex. For current licensing terms and to report issues, visit the developer's GitHub page. Always confirm the latest license details there before relying on them for your project.
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