# 3MF Viewer Online: Inspect Parts, Units & Dimensions Inspect 3MF core triangle geometry with declared units and repeated component instances. Inspect 3MF core triangle geometry with declared units and repeated component instances. ## Open your file Inspect 3MF core triangle geometry with declared units and repeated component instances. Select or drop the file to start processing immediately. For guests, temporary workspace copies remain limited to the browser session and expire after the configured retention period. Signed-in files are saved to the account library when space is available; otherwise they remain temporary. ## What is supported Core mesh geometry only. Manufacturing extensions are not interpreted. Packages are limited to 50 entries and 200 MiB expanded. All properties are mesh approximations. ## Read the result responsibly Display units can be changed without changing source geometry. Confirm source units and material density before using physical properties. A preview is not a manufacturing validation. **Input formats:** 3MF [Open this tool](https://www.cadprops.com/workspace/index.md) General steps for uploading, viewing, sectioning, measuring, converting and exporting are explained once in [How it works](https://www.cadprops.com/how-it-works/index.md). This page covers what is specific to this file type. ## Real CADProps screenshots The screenshots show the English interface. Captions and instructions describe the same operations.
Properties — box.3mf · 10 × 20 × 30 mm · 6,000 mm³ · 2,200 mm²
Properties — box.3mf · 10 × 20 × 30 mm · 6,000 mm³ · 2,200 mm²
[Sample source and verification](https://www.cadprops.com/examples/index.md) ## When a result needs another check Viewing and measuring can start without an account. 3MF is a mesh input and is not an available conversion source; use a supported CAD source in the conversion workflow. Account storage and share creation require signing in. Temporary files expire after the displayed retention period. Read the privacy statement for server processing and deletion, and the accuracy notes before using numerical results. Do not assume that hiding a part, clipping it or exploding an assembly changes the exported source geometry. [When a result needs another check](https://www.cadprops.com/accuracy/index.md) · [Input formats](https://www.cadprops.com/supported-formats/index.md) ## Continue with a related task - [STEP File Dimensions Online: Measure X, Y, Z & Distances](https://www.cadprops.com/tools/cad-dimensions/index.md) - [Batch STEP Properties: Export CAD Measurements to CSV](https://www.cadprops.com/tools/batch-cad-processing/index.md) ## Capabilities and limits - Inspect 3MF core triangle geometry with declared units and repeated component instances. - Only core mesh geometry is read; manufacturing extensions are not interpreted and mesh properties are approximate. - Files are uploaded for server processing; support depends on format, version and geometry. - Viewing and measuring do not require an account. Conversion from 3MF input is unavailable. Sign in to save files across devices or create share links. ## Questions about this task ### How can I view a 3MF file with repeated components online? Inspect 3MF core triangle geometry with declared units and repeated component instances. Select or drop the file to start processing immediately. For guests, temporary workspace copies remain limited to the browser session and expire after the configured retention period. Signed-in files are saved to the account library when space is available; otherwise they remain temporary. ### Does the 3MF viewer read printer settings or manufacturing extensions? Core mesh geometry only. Manufacturing extensions are not interpreted. Packages are limited to 50 entries and 200 MiB expanded. All properties are mesh approximations. ### Are 3MF volume and surface-area measurements exact? Inspect 3MF core triangle geometry with declared units and repeated component instances. Core mesh geometry only. Manufacturing extensions are not interpreted. Packages are limited to 50 entries and 200 MiB expanded. All properties are mesh approximations. HTML page: https://www.cadprops.com/tools/3mf-viewer/