Convert text to Base64, or Base64 back to plain text. Split input by line to process multiple items in one batch.
Base64 is an encoding scheme that represents binary data as plain text. It's commonly used for email attachments, embedding images inside JSON, and API auth tokens. Encoding is not encryption — don't use it to hide sensitive data.
Use "process each line separately" when you need to encode or decode a list of API keys, emails, or config values at once. One item per line in, one result per line out, in the same order.