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.AXV file extension

To open .AXV files on Windows, install or update VLC media player.

To open a .AXV file, try VLC media player first, because VLC lists Annodex among its supported container formats. Do not rename the file extension; if it will not open, the file may be incomplete, misidentified, or require Annodex-aware software.

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Last updated: April 29, 2026 · Reviewed by Julian Stricker

Open on your device

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

How to open .AXV files

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

Windows

  1. Install or update VLC media player.
  2. Right-click the .AXV file, choose Open with, and select VLC media player.
  3. If VLC does not open it, confirm the file finished downloading and that it is really an Annodex video rather than a renamed file.
Full Windows guide

Mac

  1. Install or update VLC media player for macOS.
  2. Control-click the .AXV file, choose Open With, and select VLC.
  3. If needed, try another player known to support .AXV/Annodex, such as a Macgo player listed for this file type.
Full Mac guide

Linux

  1. Install VLC from your distribution's software manager if it is not already installed.
  2. Open VLC, choose Media/Open File, and select the .AXV file.
  3. If playback fails, check whether your system recognizes the file as video/annodex and verify the file is not damaged.
Full Linux guide

iOS

  1. iOS does not normally preview .AXV files in Files or Quick Look.
  2. If a trusted media player on the device cannot open it, transfer the file to a desktop system and try VLC there.
Full iOS guide

Android

  1. Android does not normally provide native .AXV playback.
  2. If an installed media player cannot open the file, transfer it to Windows, macOS, or Linux and try VLC.
Full Android guide

Security notes

  • .AXV is a media container format, not a document format with macros, but media parsers can still have vulnerabilities; open untrusted files only in up-to-date players.
  • Annodex can include CMML annotation and indexing metadata. Treat any links or external references shown by a player as untrusted unless you know the source.
  • Be cautious with very old or obscure Annodex tools, because unsupported media software may not receive security fixes.
  • If a file was unexpectedly sent as an .AXV attachment, verify the sender and the file type before opening it.

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Can't open this file?

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

Common reasons

  • No app is associated with .AXV
  • The file opens but does not play correctly
  • The .AXV file is incomplete or corrupted
  • The file is served or detected with the wrong type

Fix steps

  1. Install or update VLC media player.
  2. Use Open with and select VLC manually.
  3. Avoid changing the extension to .mp4, .avi, or another format; that does not convert the video.

OS-specific troubleshooting

What is a .AXV file?

An .AXV file is an Annodex video file. Annodex is a digital media format based on Ogg and can include compressed video, codec information, and CMML metadata used for annotation, indexing, and time-based navigation. The associated MIME type is video/annodex.

Background

Annodex was developed as a way to make time-based media easier to search, annotate, and reference. It combines Ogg-based media with CMML metadata, allowing video and audio to be linked to descriptions, time offsets, and other indexing information.

Common MIME types: video/annodex

Further reading

Authoritative resources for more details on the .AXV format.

Common .AXV issues

No app is associated with .AXV

Because Annodex is uncommon, many systems do not automatically know which program should open .AXV files.

  1. Install or update VLC media player.
  2. Use Open with and select VLC manually.
  3. Avoid changing the extension to .mp4, .avi, or another format; that does not convert the video.

The file opens but does not play correctly

The container may be recognized, but the video stream, metadata, or codec information may not be handled correctly by the chosen player.

  1. Try VLC if you used another player first.
  2. Update the player to the latest available version.
  3. If possible, ask the sender to export or convert the video to a more common format.

The .AXV file is incomplete or corrupted

A partial download or interrupted transfer can prevent the Ogg/Annodex structure from being read.

  1. Compare the file size with the original source if available.
  2. Download or copy the file again.
  3. Try opening a different .AXV file to confirm whether the problem is the file or the software.

The file is served or detected with the wrong type

Web servers and file managers may misidentify uncommon formats. For .AXV, the expected MIME type is video/annodex.

  1. If you manage the server, configure .axv files as video/annodex.
  2. If downloading from a website, save the file locally before opening it in a media player.
  3. Check that the filename did not gain an extra extension such as .html or .txt during download.

FAQ

What program opens .AXV files?

VLC media player is the best first choice because VideoLAN lists Annodex among VLC's supported container formats. FileInfo also lists Macgo players as possible software for this extension.

Is .AXV the same as an Ogg video?

It is related but not exactly the same. Annodex is based on Ogg and adds CMML metadata for annotation and indexing.

Can I convert .AXV to MP4 by renaming it?

No. Renaming only changes the filename suffix. Use a media tool that can read the Annodex file and export or transcode it to another format.

What is the MIME type for .AXV?

The MIME type associated with .AXV is video/annodex, as listed by sources such as FILExt, Debian media-types, and Apache Tomcat MIME mappings.

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