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.OSM file extension

To open .OSM files on Windows, in QGIS, use the OpenStreetMap tools and choose the option to load OSM data from a file (the file should be an OpenStreetMap XML .osm file).

To open a .osm file, use a GIS application that can read OpenStreetMap OSM XML (for example, QGIS’s OpenStreetMap tools or software that uses GDAL). If you just need to inspect it, it is XML text wrapped in an <osm> element and can be viewed in a text editor.

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Last updated: June 12, 2026

Open on your device

Choose your operating system for a dedicated step-by-step opening guide.

How to open .OSM files

Use these platform-specific instructions to open .OSM files safely.

Windows

  1. In QGIS, use the OpenStreetMap tools and choose the option to load OSM data from a file (the file should be an OpenStreetMap XML .osm file).
  2. If you are working with data processing tools, open/import the .osm file using GDAL-supported software that can read OpenStreetMap .osm.
Full Windows guide

Mac

  1. Open the .osm file in a GIS tool that supports OSM XML (for example, QGIS with its OpenStreetMap tools).
  2. For conversion or processing workflows, use GDAL-based tooling that supports reading OpenStreetMap .osm files.
Full Mac guide

Linux

  1. Open the .osm file in QGIS using the OpenStreetMap tools and load the OSM XML file.
  2. Alternatively, use GDAL-supported tools/workflows to read the .osm dataset for conversion or analysis.
Full Linux guide

iOS

  1. There is no commonly documented iOS-native way in the provided sources to import .osm directly; transfer the file to a desktop GIS tool (for example QGIS) or a GDAL-based workflow to open it.
Full iOS guide

Android

  1. There is no commonly documented Android-native way in the provided sources to import .osm directly; transfer the file to a desktop GIS tool (for example QGIS) or a GDAL-based workflow to open it.
Full Android guide

Security notes

  • OSM XML is data (nodes/ways/relations and tags), not an executable format, but it can still be a risk to open untrusted files in complex parsers due to potential XML parsing vulnerabilities in third-party tools.
  • Very large or intentionally crafted .osm files can cause resource exhaustion (high RAM/CPU usage) when imported; prefer opening unknown files in a controlled environment and consider using smaller extracts.
  • If your workflow pulls .osm from online sources or APIs, validate that the file is well-formed OSM XML (wrapped in an <osm> element) before processing it in automated pipelines.

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Can't open this file?

These are the most common causes and fixes when .OSM files fail to open.

Common reasons

  • The file opens as plain text instead of a map layer
  • Import fails or appears empty
  • Performance problems with large .osm files

Fix steps

  1. Open the file using a GIS tool that supports OpenStreetMap OSM XML (for example, QGIS’s OpenStreetMap tools that load OSM from file).
  2. If you are using a GDAL-based workflow, ensure you are reading it with the OpenStreetMap driver support for .osm.

OS-specific troubleshooting

What is a .OSM file?

OSM XML is an XML-based interchange format used by OpenStreetMap to represent map data as three core primitives: nodes, ways, and relations. Files (and API responses) are wrapped in an <osm> root element and include elements describing geometry and tags (key/value attributes) for features. The .osm extension is commonly used for downloaded OpenStreetMap extracts in this format.

Background

The .osm file extension is most commonly associated with OpenStreetMap’s OSM XML format, a human-readable (but potentially large) XML representation of OSM map data. Data is organized around nodes (points), ways (ordered lists of nodes, often roads or boundaries), and relations (groupings that model complex features).

Further reading

Authoritative resources for more details on the .OSM format.

Common .OSM issues

The file opens as plain text instead of a map layer

.osm is XML. If you open it in a text editor, you will see XML elements (including an <osm> root), not a rendered map. To view it as geographic data, you must import it using OSM-aware GIS tools.

  1. Open the file using a GIS tool that supports OpenStreetMap OSM XML (for example, QGIS’s OpenStreetMap tools that load OSM from file).
  2. If you are using a GDAL-based workflow, ensure you are reading it with the OpenStreetMap driver support for .osm.

Import fails or appears empty

Some tools expect a valid OSM XML structure (with nodes/ways/relations under an <osm> element). If the file is incomplete, truncated, or not actually OSM XML, imports can fail or show no features.

  1. Open the file in a text editor and confirm it is OSM XML (look for an <osm> root element and elements like <node>, <way>, and <relation>).
  2. If the file came from an API response or download, re-download the data and try importing again.

Performance problems with large .osm files

OSM XML is verbose; large extracts can be slow to open and memory-intensive in desktop GIS tools compared with more compact representations.

  1. If possible for your workflow, use software that supports efficient OSM handling and conversion via GDAL’s OpenStreetMap support.
  2. Work with smaller geographic extracts (download a smaller area) and then load/import again.

FAQ

What is inside a .osm file?

Typically, OpenStreetMap data encoded as OSM XML: an <osm> root element containing nodes, ways, and relations, plus tags (key/value pairs) describing features.

Is .osm the same as OpenStreetMap’s API XML?

They are closely related: OpenStreetMap API v0.6 XML responses are wrapped in an <osm> element and use the same OSM XML structures (nodes, ways, relations).

Can GDAL read .osm files?

Yes. GDAL documents support for reading OpenStreetMap data, including XML-based .osm files (and also .pbf).

Is there an official standardized MIME type for .osm?

The provided sources do not show a registered IANA media type specifically for OSM XML (.osm). If you need a MIME type, confirm it in your environment’s standards list or application documentation.

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