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.EZ file extension

To open .EZ files on Windows, if you have Andrew/AUIS (Andrew Toolkit) tools installed, open the file from within the EZ editor (or use Open With and select that tool).

To open a .ez file, use software from the Andrew User Interface System / Andrew Toolkit—most notably the EZ editor. If your device cannot run AUIS/ATK tools, the most reliable option is to open the file on a desktop system where those tools are available.

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Last updated: April 30, 2026 · Reviewed by Julian Stricker

Open on your device

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

How to open .EZ files

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

Windows

  1. If you have Andrew/AUIS (Andrew Toolkit) tools installed, open the file from within the EZ editor (or use Open With and select that tool).
  2. If you do not have Andrew tools on Windows, transfer the .ez file to a system where AUIS/ATK tools are available and open it there (this is often the most practical approach).
Full Windows guide

Mac

  1. If you have Andrew/AUIS (Andrew Toolkit) software installed, open the .ez file from that application (or use Open With and choose the Andrew tool).
  2. If you cannot install or run Andrew tools on macOS, open the file on a desktop environment where AUIS/ATK tools are available.
Full Mac guide

Linux

  1. Try opening the .ez file with an Andrew Toolkit/AUIS EZ editor installation (the format is recognized in shared MIME info as application/andrew-inset for *.ez).
  2. If your file manager doesn’t know what to do, use Open With and select an Andrew/ATK application associated with “andrew-inset”.
Full Linux guide

iOS

  1. There is no common native iOS app for Andrew/AUIS .ez documents; transfer the file to a desktop system with Andrew Toolkit/AUIS tools (EZ editor) to open it.
Full iOS guide

Android

  1. There is no common native Android app for Andrew/AUIS .ez documents; transfer the file to a desktop system with Andrew Toolkit/AUIS tools (EZ editor) to open it.
Full Android guide

Security notes

  • Treat .ez files as untrusted input if they come from unknown sources: they rely on a specific parser (Andrew Toolkit/AUIS), and malformed files could potentially trigger vulnerabilities in that software.
  • Because .ez maps to application/andrew-inset in shared MIME databases, be cautious with automatic “open on download” behaviors; prefer opening it explicitly in the intended Andrew/EZ tools.
  • If you must inspect a suspicious .ez file, avoid opening it directly in the full Andrew environment; instead, request a safe export from the sender or examine it in a controlled environment.

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Can't open this file?

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

Common reasons

  • No app can open the .ez file
  • The file opens as unreadable text in a generic editor
  • Wrong file type: not an Andrew/EZ document

Fix steps

  1. On Linux/desktop systems, install and use an Andrew Toolkit/AUIS application (EZ editor) to open the file.
  2. If you are on iOS/Android, move the file to a desktop system where Andrew tools are available.

OS-specific troubleshooting

What is a .EZ file?

The .ez extension is associated with Andrew Toolkit content; in shared MIME databases it maps to application/andrew-inset and the glob *.ez (commented as an “ATK inset”). EZ documents can include structured content used by Andrew applications, not just plain text, so opening them in unrelated editors may show markup or unreadable data.

Background

EZ is a document/editor environment developed as part of the Andrew User Interface System (AUIS). In practice, many .ez files are “EZ” documents produced/used by the EZ editor and related Andrew tools.

Common MIME types: application/andrew-inset

Further reading

Authoritative resources for more details on the .EZ format.

Common .EZ issues

No app can open the .ez file

Many systems do not have Andrew Toolkit/AUIS software installed, so the OS cannot associate .ez with an appropriate application.

  1. On Linux/desktop systems, install and use an Andrew Toolkit/AUIS application (EZ editor) to open the file.
  2. If you are on iOS/Android, move the file to a desktop system where Andrew tools are available.

The file opens as unreadable text in a generic editor

.ez files may contain structured Andrew “inset” data rather than plain text, so a basic text editor can show confusing markup or binary-like content.

  1. Open the file in the EZ editor / Andrew Toolkit software rather than a generic text editor.
  2. If you only need to view content, ask the sender to export to a more common format from their Andrew environment (if available).

Wrong file type: not an Andrew/EZ document

Some filenames use .ez for other purposes; if the file did not come from an Andrew/AUIS workflow, it may be unrelated despite sharing the same extension.

  1. Confirm the originating application/workflow with the sender (e.g., whether it came from AUIS/Andrew/EZ Word).
  2. If available, check your system’s file type identification (MIME may show application/andrew-inset when it’s an Andrew inset).

FAQ

What program opens .ez files?

.ez files are commonly Andrew Toolkit/AUIS “EZ” documents (Andrew insets). They are opened with the EZ editor and related Andrew/AUIS tools.

Is .ez the same as a normal text document?

Not necessarily. EZ/Andrew documents can store structured “inset” content, so they may not display correctly in plain text editors.

What is the MIME type for .ez?

In the freedesktop.org shared MIME database, *.ez is associated with application/andrew-inset (commented as an “ATK inset”).

Can I open .ez files on iPhone or Android?

There is no common native support for Andrew/AUIS .ez documents on iOS/Android. The practical approach is to transfer the file to a desktop system with Andrew Toolkit/AUIS tools.

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