CVT File

What are CVT files and how to open them

Are you having problems opening a CVT file or are you simply curious about its contents? We're here to explain the properties of these files and provide you with software that can open or handle your CVT files.

What is a CVT file?

A .CVT file is a GEOS ConVerT Container Format file.

GEOS ConVerT Container Format files store GEOS files in a special form that allows them to be moved or transmitted using non-GEOS disk formats. They are produced by the GEOS utility Convert (notably version 2.0 / 2.5) to turn a GEOS-native file into a standard Commodore sequential file. Such conversion is done so that files can be uploaded, shared, archived, or otherwise handled outside the GEOS desktop environment. Later the same utility reverses the process, restoring the file to GEOS-native form so that GEOS can use it again.

The tool that creates and restores these files is the GEOS "Convert" program (versions such as Convert 2.0 and 2.5). When converting, the GEOS file's full metadata - including its internal GEOS information block - is embedded into the sequential file. Upon reconversion, metadata and structure are reinstated so GEOS interprets the file as if it were never converted. These converted files often carry the .cvt suffix by convention.

Files in this format begin with a signature: at offset 33 there is the ASCII string "formattedGEOSfileV", and the file also includes the human-readable string "FORMATTED GEOS FILE V". These are used to identify converted files.

How to open CVT files

Important: Different programs may use files with the CVT file extension for different purposes, so unless you are sure which format your CVT file is, you may need to try a few different programs.

While we have not verified the apps ourselves yet, our users have suggested three different CVT openers which you will find listed below.

Last updated: September 19, 2026

Various apps that use files with this extension

These apps are known to open certain types of CVT files. Remember, different programs may use CVT files for different purposes, so you may need to try out a few of them to be able to open your specific file.

Help us help others

File.org helps thousands of users every day, and we would love to hear from you if you have additional information about CVT file formats, example files, or compatible programs. Please use the links below or email us at submit@file.org to discuss further.