An ISO (.iso) file is a sector-by-sector copy of an optical disc, stored as a single file. It follows the ISO 9660 (and often UDF) filesystem standard, allowing it to be burned to a disc or mounted as a virtual drive.

Are my ISO files uploaded?

No. Files you open from your device stay on your device and are read locally. Only the public sample disc image is requested from the server.

Can it read UDF and bootable ISOs?

The viewer reads standard ISO9660 with Rock Ridge / Joliet extensions and UDF. It lists files for inspection; boot-related sectors are not executed.

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ISO Viewer

Free online ISO viewer. Open disc image files (.iso) in your browser to list contents — no upload, no extraction.

.iso

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Tool usage guide

About this file format

ISO (.iso) is a disc image format that stores a sector-by-sector copy of an optical disc (CD, DVD or Blu-ray) in a single file. It follows the ISO 9660 filesystem standard, often extended with Rock Ridge (Unix permissions) or Joliet (long filenames) extensions, and sometimes UDF for newer discs. ISO images are the standard way to distribute operating systems, games and large software packages.

ISO Viewer

About this file format

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ISO Viewer

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