T64 File

What are T64 files and how to open them

Are you having problems opening a T64 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 T64 files.

What is a T64 file?

A .T64 file is a Commodore 64 Tape Image file.

Commodore 64 Tape Image files in the T64 format store software programs or data originally distributed on cassette tapes for the Commodore 64 computer. They combine several individual files from a tape into one archive, preserving directory information and load/datastart addresses. Emulators use them to load several tape files or programs as if they were on one DAT file.

T64 files are created mainly by Miha Peternel for use in the C64S emulator. Once made, they are generally used only for loading programs in emulators that support the format. The VICE emulator supports them read-only and presents their file directory so you can choose which file to load. Because they are a container and not a raw tape dump format, they do not precisely emulate tape timing and signal details.

Internally the format begins with a fixed-size header (a "tape record" or T64 header), which includes a magic identifier string, version number, number of directory entries, number of used entries, and a descriptive label. Following that are directory entries each describing one logical file: its type, load and end addresses in the Commodore 64 address space, and the offset in the T64 file where that file's contents begin. After the directory, the actual file data is stored consecutively.

How to open T64 files

We have identified one T64 opener that is compatible with this specific type of T64 file.

Programs that open Commodore 64 Tape Image files

Last updated: August 13, 2026

Various apps that use files with this extension

These apps are known to open certain types of T64 files. Remember, different programs may use T64 files for different purposes, so you may need to try out a few of them to be able to open your specific file.

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