How to check if a file exists from inside a batch file

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How to verify if a file exists in a DOS (Windows Command Prompt) .BAT file? 3 answers

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if exist <insert file name here> (
    rem file exists
) else (
    rem file doesn't exist
)

Or on a single line (if only a single action needs to occur):

if exist <insert file name here> <action>

for example, this opens notepad on autoexec.bat, if the file exists:

if exist c:autoexec.bat notepad c:autoexec.bat

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C:>help if

Performs conditional processing in batch programs.

IF [NOT] ERRORLEVEL number command

IF [NOT] string1==string2 command

IF [NOT] EXIST filename command

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Try something like the following example, quoted from the output of IF /? on Windows XP:

    IF EXIST filename. (
        del filename.
    ) ELSE (
        echo filename. missing.
    )

You can also check for a missing file with IF NOT EXIST .

The IF command is quite powerful. The output of IF /? will reward careful reading. For that matter, try the /? option on many of the other built-in commands for lots of hidden gems.

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