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.UVI file extension

To open .UVI files on Windows, right-click the .UVI file → Open with → Choose another app.

To open a .UVI file, try an image viewer that can handle the MIME type image/vnd.dece.graphic (DECE graphic). If your default photos app won’t open it, use “Open with” on a desktop OS or move the file to a machine that has broader format support.

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Last updated: June 11, 2026 · Reviewed by Julian Stricker

What “reviewed” means on this page
  • Format fit: whether the “what is this file?” description matches common real-world use of the extension, including category, typical MIME types, and aliases.
  • Opening paths: whether Windows / macOS / Linux steps read plausibly for current OS dialogs and default apps; we remove fantasy menus and unsafe shortcuts.
  • Security framing: whether risk notes match the extension class (for example executables vs plain data) and whether affiliate wording does not contradict the security section.
  • Sources and further reading: whether external links point to vendors, standards bodies, or other primary references where possible; we avoid inventing details we cannot ground.
  • Limits: this is clarity and safety-messaging QA, not a guarantee that every statement is exhaustive or that every binary you download is harmless.

Full methodology in the Imprint — The Imprint also states where AI is used and what that does—and does not—replace.

Open on your device

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

How to open .UVI files

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

Windows

  1. Right-click the .UVI file → Open with → Choose another app.
  2. If no installed app opens it, move the file to a desktop machine with more image tools available and try a different viewer/graphics tool that supports image/vnd.dece.graphic.
  3. If you’re serving it from a web server, ensure it’s sent as Content-Type: image/vnd.dece.graphic (so compatible clients can recognize it).
Full Windows guide

Mac

  1. Control-click the .UVI file → Open With → choose an available image/graphics app.
  2. If it fails with “unsupported,” try opening it on another desktop environment or toolset that supports image/vnd.dece.graphic (macOS may recognize the extension but still not render it).
Full Mac guide

Linux

  1. In your file manager, right-click → Open With and try your installed image viewers.
  2. If it doesn’t open, verify your desktop MIME database recognizes the file type and then try a different image tool; some environments map the MIME type but don’t ship a decoder.
Full Linux guide

iOS

  1. In the Files app, tap the .UVI file to try a preview; if there’s no preview/it fails, transfer the file to a desktop OS to open it with a compatible image tool.
Full iOS guide

Android

  1. Tap the .UVI file in your file manager; if no app can open it, transfer it to a desktop OS and open it there (many Android viewers won’t include a decoder for this format).
Full Android guide

Security notes

  • .UVI is an image media type (image/vnd.dece.graphic), but image decoders can still have vulnerabilities; only open files from sources you trust, especially if the viewer is older.
  • Avoid “fixing” a .UVI by renaming it to .png/.jpg; that can confuse software and lead you to open it in tools that mis-parse the content.
  • If you host .UVI files on a web server, set the correct Content-Type (image/vnd.dece.graphic) to reduce content sniffing and incorrect handling by clients.

Complex decoders and untrusted media

Image, audio, and video decoders are large software surfaces; issues are uncommon for everyday files but show up with crafted files from unknown sources. Keeping the OS and media apps updated matters most; scanning is reasonable extra caution for downloads you cannot vouch for.

Avast

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Norton

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Can't open this file?

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

Common reasons

  • “Unsupported format” or the image won’t preview
  • File opens as a generic/binary file or the wrong app launches
  • Web server serves the file with the wrong Content-Type

Fix steps

  1. Try “Open with” and test a different image/graphics application on a desktop OS.
  2. If you received the file from someone, ask the sender what application/workflow produced it and whether they can export to a more widely supported image format.

OS-specific troubleshooting

What is a .UVI file?

.UVI is an extension associated with the IANA media type image/vnd.dece.graphic. It is part of the DECE (Digital Entertainment Content Ecosystem) graphic family, which is also associated with extensions like .uvvi, .uvg, and .uvvg. Because support varies by software, many systems may recognize the MIME mapping but still lack a built-in decoder to display the image.

Background

The .UVI extension is formally tied to the IANA-registered image subtype image/vnd.dece.graphic, with DECE Technical Working Group listed as the change controller. This registration also covers related extensions (.uvvi, .uvg, .uvvg), which may represent closely related variants within the same family.

On many systems, file extension recognition (and web server content-type configuration) is handled via MIME mappings. For example, common server and library mappings associate .uvi with image/vnd.dece.graphic so that the correct Content-Type can be sent when the file is hosted on the web.

However, MIME recognition does not guarantee that a given photo viewer can render the file. If your OS or app doesn’t include a decoder for this format, you may see errors like “unsupported format” even though the file is correctly identified as an image type.

Common MIME types: image/vnd.dece.graphic

Further reading

Authoritative resources for more details on the .UVI format.

Common .UVI issues

“Unsupported format” or the image won’t preview

Your OS may recognize .UVI as image/vnd.dece.graphic but your viewer does not include a decoder for this specific image format/variant.

  1. Try “Open with” and test a different image/graphics application on a desktop OS.
  2. If you received the file from someone, ask the sender what application/workflow produced it and whether they can export to a more widely supported image format.

File opens as a generic/binary file or the wrong app launches

The file association may be missing or incorrect even if the extension-to-MIME mapping exists in some databases or server configurations.

  1. Manually choose an application via “Open with” rather than double-clicking.
  2. On Linux, ensure your environment’s MIME database is up to date so .uvi maps to image/vnd.dece.graphic.

Web server serves the file with the wrong Content-Type

If the server does not map .uvi to image/vnd.dece.graphic, browsers and clients may mis-handle downloads or rendering.

  1. Configure your server to send Content-Type: image/vnd.dece.graphic for .uvi (and related extensions if needed).
  2. If using Apache, confirm your mime.types / mod_mime configuration includes the mapping for uvi → image/vnd.dece.graphic.

FAQ

What MIME type is associated with .UVI?

IANA registers .uvi under the MIME type image/vnd.dece.graphic (also used with .uvvi, .uvg, and .uvvg).

Why doesn’t my Photos app open a .UVI image?

MIME/extension recognition does not guarantee decoding support. Your app may not include a decoder for the DECE graphic format even if it identifies it as an image.

Can I convert a .UVI file by just renaming the extension?

No. Renaming only changes the filename, not the underlying image encoding. Use an application that can open the file and export/save to another format.

Are .UVI and .UVG the same thing?

They are both mapped to the same IANA media type (image/vnd.dece.graphic) and are part of the same registered family of extensions, but different extensions can indicate different variants or usage contexts.

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