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P4 CLI Documentation | 2026.1

# P4DIFFUNICODE

Used to support UTF-16 and UTF-32 character sets from the Command-line Client.

## Usage notes

Used by Client? | Used by Server? | Command-Line Alternative | Can be set in P4CONFIG file?
--- | --- | --- | ---
Yes | No | None | Yes

## Value if not explicitly set

Operating System | Value
--- | ---
Windows | None

## Notes

This environment variable is used in place of P4DIFF if the file being diffed is of type unicode or utf16, and the character set is passed as the first argument to the command.

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