---
title: Custom importer
tags: [importer, extension]
rust: https://github.com/rerun-io/rerun/tree/latest/examples/rust/custom_importer/src/main.rs
---

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This example demonstrates how to implement and register an `Importer` into the Rerun Viewer in order to add support for loading arbitrary files.

Usage:
```sh
$ cargo r -p custom_importer -- path/to/some/file
```