# Draw.io Viewer

Free online Draw.io viewer. Open and preview Draw.io diagrams (.drawio, .dio) directly in your browser — no upload, no software.

> Canonical page: https://elysiatools.com/en/viewers/drawio

- **Category:** Diagrams

- **Supported formats:** .drawio, .dio

## Overview

This Draw.io viewer renders diagrams.net (Draw.io) files directly in your browser. Draw.io (.drawio, .dio) is the open-source diagramming tool's native XML format, widely used for flowcharts, network diagrams, UML and architecture diagrams. Pick a sample diagram or choose your own .drawio file to preview it instantly, with no upload.

## When to use

- You received a .drawio file and want to view it without installing Draw.io.
- You need a quick, private preview of a flowchart or architecture diagram.
- You want to inspect a Draw.io diagram on any device.

## How it works

- Select a built-in sample diagram or choose your own .drawio / .dio file.
- The viewer renders the diagram in your browser using the diagrams.net viewer engine — nothing is uploaded.
- Pan and zoom to inspect the diagram.

## Use cases

- Previewing flowcharts and process diagrams.
- Inspecting architecture and network diagrams.
- Checking UML and ER diagrams from Draw.io.

## Samples

- **Sample Draw.io Diagram**: A Draw.io diagram sample for in-browser preview

## Frequently asked questions

### What is a Draw.io file?

Draw.io (.drawio, .dio) is the native XML format of diagrams.net (formerly Draw.io), the popular open-source diagramming application. Files store shapes, connectors, styles and page layout as structured XML, and can be opened by diagrams.net online, desktop or VS Code extension.

### Are my Draw.io files uploaded?

No. Diagrams you open from your device stay on your device and are rendered locally. Only the public sample diagram is requested from the server.

### Can I edit diagrams?

No, this is a viewer. It renders the diagram for inspection without uploading. For editing, use the diagrams.net web app or desktop application.

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