UTF8 file validator. This small utility will help to check if UTF-8 files are really properly encoded.

Find the ready-built tool Utf8Validate.jar in bin/ subdirectory. Run the tool and check for exit code:

java -jar Utf8Validate.jar < "somefile.txt" > /dev/null

Exit codes:

• 0: UTF-8
• 1: UTF-8 with BOM
• 2: Plain ASCII
• 10: Not valid UTF-8

You can find ready-made example script in scripts/ directory.

This mini-tool is written in Java. You will need

• Java compiler,
• JUNIT jar library located here: $JUNIT_HOME/junit.jar
• ant

To build the tool:

ant clean jar