このツールとは？
The Base64 encoder/decoder converts text or binary data to Base64, or decodes Base64 back to the original data.
なぜ使う？
Useful when you need to pass images or files as text, or when working with Base64 in APIs or config. Common in development.
使い方
Enter text or paste a Base64 string, then choose "Encode" or "Decode". Copy the result. Invalid Base64 will show an error.
Processing is done only in the browser; data is not sent to the server.